DWYER Series A3000 Photohelic Pressure Switch-Gage #1216532

Dwyer A3000-50CM Photohelic Pressure Switch Gauge Range 0-50 cm w.c.

Dwyer A3000-50CM Photohelic Pressure Switch/Gauge (0-50cm w.c.)

Model: A3000-50CM

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3000-50CM Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3000-50CM Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F(75C)copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F(21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20"Hg to 25 psig(-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option;80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F(-28 to 48.9C) with low temperature option

Process Connections:female NPT

Dimensions:4"(101.6 mm) dial face, 5 x 8"(127 x 209.55 mm)

Weight:4 lb (1.81 kg)

dwyer a3205 photohelic pressure switch gauge range 0-5 psi

dwyer a3205 photohelic pressure switch/gauge (0-5 psi)

model: a3205

bezel and front cover (with set point knobs and zero adjustment screw) removed to expose photohelic switch/gage set point mechanism. Cover is clear polycarbonate plastic. Gage pointer and light shutter are mounted on helix and balancing counterweight.

dwyer a3205 offers

features

measure 4 to 20 ma signals without "breaking the loop"

measure ma signals for plc and control system analog i/o

dual backlit display with both ma measurement and percent of 4 to 20 ma span

measurement spotlight illuminates hard to see wires in dark enclosures

detachable clamp with extension cable for measurements in tight locations

measure 10 to 50 ma signals in older control systems using the 99.9 ma range

automatically change the 4 to 20 ma output for remote testing

power saving features, auto-off, backlight timeout extend battery life

hold function captures and displays changing measurements

applications

air conditioner systems

clean rooms

fume exhaust systems

dwyer a3205 specifications

switch specifications

switch type:each set point has 2 form c relays (dpdt)

repeatability:1% of fs

electrical rating:10 a at 28 vdc, 10 a at 120, 240 vac

electrical connections:screw terminals. Use 167f (75c) copper conductors only

power requirements:120 vac, 50/60 hz, 240 vac and 24 vac power optional

mounting orientation:diaphragm in vertical position. Consult factory for other position orientations

set point adjustment:adjustable knobs on face

agency approvals:ce, csa, ul

gauge specifications

service:air and non-combustible, compatible gases

accuracy:2% of fs at 70f (21.1c), 3% on -0, 4% on -00 models

pressure limits:-20" hg to 25 psig (-0.677 to 1.72 bar), mp option; 35 psig (2.41 bar), hp option; 80 psig (5.52 bar)

temperature limits:20 to 120f. (-6.67 to 48.9c), -20 to 120f (-28 to 48.9c) with low temperature option

process connections:? female npt

dimensions:4" (101.6 mm) dial face, 5 x 8" (127 x 209.55 mm)

weight:4 lb (1.81 kg)

Dwyer A3000-125PA Photohelic Pressure Switch Gauge Range 0-125 Pa.

Dwyer A3000-125PA Photohelic Pressure Switch/Gauge (0-125 Pa)

Model: A3000-125PA

Bezel and Front Cover (With Set Point Knobs And Zero Adjustment Screw) Removed To Expose Photohelic Switch/Gage Set Point Mechanism. Gage Pointer And Light Shutter Are Mounted On Helix And Balancing Counter Weight.

Dwyer A3000-125PA Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Specifications

GAGE SPECIFICATIONS

Service:Air and Non-Combustible, Compatible Gases.

Wetted Materials:Consult Factory.

Accuracy:2% of FS at 70F (21.1C).3% on -0 and 4% on -00 models.

Pressure Limits:-20" Hg.to 25 psig (-0.677 to 1.72 bar).MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar).

Temperature Limits:20 to 120F.(-6.67 to 48.9C).-20 to 120F (-28 to 48.9C) with low temperature option.

Process Connections:1/8" female NPT.

Size:4" (101.6 mm) dial face, 5"(127 mm) O.D.x 8-1/4"(209.55 mm).

Weight:4 lb (1.81 kg).

SWITCH SPECIFICATIONS

Switch Type:Each setpoint has 2 Form C relays (DPDT).

Repeatability:1% of FS.

Electrical Rating:10 A @ 28 VDC, 10 A @ 120, 240 VAC.

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only.

Power Requirements:120 VAC, 50/60 Hz; 240 VAC & 24 VAC power optional.

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations.

Set Point Adjustment:Adjustable knobs on face.

Agency Approvals:CE, CSA, UL.

Dwyer A3000-1KPA Photohelic Pressure Switch Gauge Range 0-1 kPa.

Dwyer Instruments A3000-1KPA

Photohelic Pressure Switch/Gage Range 0-1 kPa.

Order : A3000-1KPA

Mfg : A3000-1KPA

Photohelic Switch/Gages Function as Versatile, Highly Repeatable Pressure Switches Combined with a Precise Pressure Gage employing the time-Proven Magnehelic Gage design. The Photohelic switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Single pressure 36000S models measure to 6000 psig (413 bar) with a 9000 psig (620 bar) rating. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25" (0-6 mm) w.c. up to 30 psi (21 bar); single positive pressure to 6000 psig (413 bar).

Availability: Item ships in about Ships in 4-6 weeks

Product Highlights

Range: 0-1 kPa.

Gage Specifications

Service:Air and non-combustible, compatible gases

Range:0-1 kPa.

Accuracy:2% of FS at 70F (21.1C)

Pressure Limits:-20" Hg.to 25 psig (-0.677 to 1.72 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C)

Process Connections:1/8" female NPT

Size:4" (101.6 mm) dial face, 5"(127 mm) O.D. x 8-1/4"(209.55 mm)

Weight:4 lb (1.81 kg)

Switch Specifications

Switch Type:Each setpoint has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10A @ 28 VDC, 10A @ 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F(75C) copper conductors only

Power Requirements:120 VAC, 60 Hz

Mounting Orientation:Diaphragm in vertical position

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Dwyer A3000-1.5KPA Photohelic Pressure Switch/Gauge (0-1.5 kPa)

Model: A3000-1.5KPA

Bezel and Front Cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3000-1.5KPA Series A3000 Photohelic Pressure Switch Range 0 to 1 5 kPa

The Dwyer A3000-1.5KPA has a Range From 0-1.5 kPA.

Photohelic Switch/Gauges Function as versatile, highly repeatable Pressure Switches combined with a precise pressure gauge employing the time-proven Magnehelic gauge design. The Photohelic switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Single pressure 36000S models measure to 6000 psig (413 bar) with a 9000 psig (620 bar) rating. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gauge face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gauge reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25" (0-6 mm) w.c. up to 30 psi (21 bar); single positive pressure to 6000 psig (413 bar).

Photohelic Sensing - How It Works

In typical applications, these Dwyer Switch/Gages control between high and low pressure set points.When pressure changes, reaching either set point pressure, the infrared light to the limiting phototransistor is cut off by the helix-driven light shutter. The resulting phototransistor signal is electronically amplified to actuate its DPDT slave relay and switching occurs. Dead band between make and break is 1% of full scale or less - just enough to assure positive, chatter-free operation.

Relay-Transformer Features

A plastic housing protects all electronic components.Solid-state and integrated circuit electronics are on glass-epoxy printed circuit boards and self-extinguishing terminal boards.

Specifications

GAGE SPECIFICATIONS

Service:Air and non-combustible, compatible gases.

Wetted Materials:Consult Factory.

Accuracy:2% of FS at 70F (21.1C). 3% on -0 and 4% on -00 models.

Pressure Limits:-20" Hg. to 25 psig (-0.677 to 1.72 bar).MP option;35 psig (2.41 bar), HP option;80 psig (5.52 bar).

Temperature Limits:20 to 120F.(-6.67 to 48.9C).-20 to 120F (-28 to 48.9C) with low temperature option.

Process Connections:1/8" female NPT.

Size:4" (101.6 mm) dial face, 5" (127 mm) O.D. x 8-1/4"(209.55 mm).

Weight:4 lb (1.81 kg).

SWITCH SPECIFICATIONS

Switch Type:Each setpoint has 2 Form C relays (DPDT).

Repeatability:1% of FS.

Electrical Rating:10 A @ 28 VDC, 10 A @ 120, 240 VAC.

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only.

Power Requirements:120 VAC, 50/60 Hz;240 VAC & 24 VAC power optional.

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations.

Set Point Adjustment:Adjustable knobs on face.

Agency Approvals:CE, CSA, UL.

Dwyer A3300-20MM Photohelic Pressure Switch Gauge Range 10-0-10 mm w.c.

Dwyer A3300-20MM Photohelic Pressure Gauge (10-0-10 mm w.c.)

Model: A3300-20MM

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic Switch/Gage set point

Mechanism.Cover is Clear Polycarbonate Plastic.Gage Pointer and Light Shutter Are Mounted on Helix and Balancing

Counterweight.

Dwyer A3300-20MM Offers

Features

Measure 4 to 20 mA Signals Without "Breaking the Loop"

Measure mA Signals For PLC and Control System Analog I/O

Dual Backlit Display With Both mA Measurement And Percent of 4 to 20 mA Span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3300-20MM Specifications

Switch Specifications

Switch Type:Each Set Point Has 2 Form C Relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals. Use 167F (75C) Copper Conductors Only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air And Non Combustible, Compatible Gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig (-0.677 to 1.72 bar), MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:female NPT

Dimensions:4" (101.6 mm)dial face, 5 x 8" (127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3000-80MM Photohelic Pressure Switch Gauge Range 0-80 mm w.c

Dwyer A3000-80MM Photohelic Pressure Switch/Gauge (0-80mm w.c.)

Model: A3000-80MM

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3000-80MM Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3000-80MM Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F(75C)copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F(21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20"Hg to 25 psig(-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option;80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F(-28 to 48.9C) with low temperature option

Process Connections:female NPT

Dimensions:4"(101.6 mm) dial face, 5 x 8"(127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3000-30KPA Photohelic Pressure Switch Gauge Range 0-30 kPa.

Dwyer A3000-30KPA Photohelic Pressure Switch/Gauge (0-30 kPa)

Model: A3000-30KPA

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic Switch/Gage set point mechanism. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3000-30KPA Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3000-30KPA Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position.Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig (-0.677 to 1.72 bar), MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:female NPT

Dimensions:4"(101.6 mm) dial face, 5 x 8"(127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3000-10KPA Photohelic Pressure Switch Gauge Range 0-10 kPa.

Dwyer Instruments A3000-10KPA

Photohelic Pressure Switch/Gage Range 0-10 kPa.

Order #: A3000-10KPA

Mfg #: A3000-10KPA

PhotohelicSwitch/Gages Function as Versatile, Highly Repeatable Pressure Switches Combined with a precise pressure gage employing the time-proven Magnehelic gage design. The Photohelic switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Single pressure 36000S models measure to 6000 psig (413 bar) with a 9000 psig (620 bar) rating. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25" (0-6 mm) w.c. up to 30 psi (21 bar);single positive pressure to 6000 psig (413 bar).

Availability: Item ships in about Ships in 4-6 weeks

Product Highlights

Range 0-10 kPa

Specifications

GAGE SPECIFICATIONS

Service:Air and Non-Combustible, Compatible Gases.

Wetted: Materials:Consult Factory.

Accuracy:2% of FS at 70F (21.1C).3% on -0 and 4% on -00 models.

Pressure Limits:-20" Hg. to 25 psig (-0.677 to 1.72 bar).MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar).

Temperature Limits:20 to 120F.(-6.67 to 48.9C).-20 to 120F (-28 to 48.9C) with low temperature option.

Process Connections:1/8" female NPT.

Size:4"(101.6 mm) dial face, 5"(127 mm) O.D.x 8-1/4"(209.55 mm).

Weight:4 lb (1.81 kg).

SWITCH SPECIFICATIONS

Switch Type:Each setpoint has 2 Form C relays (DPDT).

Repeatability:1% of FS.

Electrical Rating:10 A @ 28 VDC, 10 A @ 120, 240 VAC.

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only.

Power Requirements:120 VAC, 50/60 Hz;240 VAC & 24 VAC power optional.

Mounting Orientation:Diaphragm in vertical position.Consult factory for other position orientations.

Set Point Adjustment:Adjustable knobs on face.

Agency Approvals:CE, CSA, UL.

Dwyer A3000-25MM Photohelic Pressure Switch/Gauge (0-25mm w.c.)

Model: A3000-25MM

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelicswitch/gage set point mechanism. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3000-25MM Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3000-25MM Offers Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals. Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position.Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20"Hg to 25 psig(-0.677 to 1.72 bar), MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F(-28 to 48.9C)with low temperature option

Process Connections:female NPT

Dimensions:4"(101.6 mm)dial face, 5 x 8"(127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3000-8KPA Photohelic Pressure Switch Gauge Range 0-8 kPa.

Dwyer A3000-8KPA Photohelic Pressure Switch/Gauge (0-8 kPa)

Model: A3000-8KPA

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3000-8KPA Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3000-8KPA Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20"Hg to 25 psig(-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option;80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F(-28 to 48.9C) with low temperature option

Process Connections:female NPT

Dimensions:4"(101.6 mm) dial face, 5 x 8"(127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3301 Photohelic Pressure Switch Gauge Range .5-0-.5 Inch w.c.

Dwyer A3301 Photohelic Pressure Switch/Gauge (.5-0-.5 Inch w.c.)

Model: A3301

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic Switch/Gage set point

Mechanism. Cover is Clear Polycarbonate Plastic.Gage Pointer and Light Shutter Are Mounted on Helix and Balancing

Counterweight.

Dwyer A3301

Features

Measure 4 to 20 mA Signals Without "Breaking the Loop"

Measure mA Signals For PLC and Control System Analog I/O

Dual Backlit Display With Both mA Measurement And Percent of 4 to 20 mA Span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3301 Specifications

Switch Specifications

Switch Type:Each Set Point Has 2 Form C Relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw Terminals. Use 167F (75C) Copper Conductors Only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in Vertical Position. Consult Factory For Other Position Orientations

Set Point Adjustment:Adjustable Knobs On Face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air And Non Combustible, Compatible Gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20"Hg to25 psig (-0.677 to 1.72 bar), MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:female NPT

Dimensions:4" (101.6 mm) Dial Face, 5 x 8"(127 x 209.55 MM)

Weight:4 lb (1.81 kg)

Series A3000 Photohelic Pressure Switch/Gage

3-in-1 Indicating Gage, Lo-limit and Hi-limit Control

The Series A3000 Photohelic Switch/Gages function as versatile, highly repeatable pressure switches combined with a precise pressure gage employing the time-proven Magnehelic gage design. The Photohelic switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25 in (0-6 mm) w.c. up to 30 psi (21 bar).

Product Applications

Air Conditioning Systems

Clean Rooms

Fume Exhaust Systems

Specifications

GAGE SPECIFICATIONS

Service:Air and non-combustible, compatible gases.

Wetted Materials:Consult Factory.

Accuracy:2% of FS at 70F (21.1C).3% on -0 and 4% on -00 models.

Pressure Limits:-20" Hg. to 25 psig (-0.677 to 1.72 bar). MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar).

Temperature Limits:20 to 120F.(-6.67 to 48.9C). -20 to 120F (-28 to 48.9C) with low temperature option.

Process Connections:1/8" female NPT.

Size:4"(101.6 mm) dial face, 5" (127 mm) O.D. x 8-1/4" (209.55 mm).

Weight:4lb (1.81 kg).

Dwyer A3008 Photohelic Pressure Switch Gauge Range 0-8.0 Inch w.c.

Dwyer A3008 Photohelic Pressure Switch/Gauge (0-8.0"w.c.)

Model: A3008

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Cover is clear polycarbonate plastic.Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3008 PRESSURE SWITCH GAUGE, 0-8 in WC CSA

Measure 4 to 20 mA signals without breaking the loop

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving Features, auto-off, backlight timeout extend battery life

Dwyer A3008 Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position.Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig(-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections: female NPT

Dimensions:4" (101.6 mm) dial face, 5 x 8"(127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3150 Photohelic Pressure Switch Gauge Range 0-150 Inch w.c.

Dwyer A3150 Photohelic Pressure Switch/Gauge (0-150"w.c.)

Model: A3150

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic Switch/Gage set point mechanism. Cover is clear polycarbonate plastic.Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3150 Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3150 Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position.Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig (-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F. (-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:? female NPT

Dimensions:4"(101.6 mm) dial face, 5 x 8"(127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3204 Photohelic Pressure Switch Gauge Range 0-4 psi

Dwyer A3204 Photohelic Pressure Switch/Gauge (0-4 psi)

Model: A3204

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Cover is clear polycarbonate plastic. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3204 Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3204 Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals. Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig (-0.677 to 1.72 bar), MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F. (-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections: female NPT

Dimensions:4"(101.6 mm) dial face, 5 x 8" (127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3040 Photohelic Pressure Switch Gauge Range 0-40 Inch w.c.

Dwyer A3040 Photohelic Pressure Switch/Gauge (0-40"w.c.)

Model: A3040

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Cover is clear polycarbonate plastic. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3040 Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3040 Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals. Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig (-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F(-28 to 48.9C) with low temperature option

Process Connections:female NPT

Dimensions:4" (101.6 mm) dial face, 5 x 8" (127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3080 Photohelic Pressure Switch Gauge Range 0-80 Inch w.c.

Dwyer A3080 Photohelic Pressure Switch/Gauge (0-80"w.c.)

Model: A3080

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Cover is clear polycarbonate plastic. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3080 Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3080 Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position.Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig (-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F. (-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:? female NPT

Dimensions:4"(101.6 mm) dial face, 5 x 8"(127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3002 Photohelic Pressure Switch Gauge Range 0-2.0 Inch w.c.

Dwyer A3002 Photohelic Pressure Switch/Gauge (0-2.0"w.c.)

Model: A3002

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Cover is clear polycarbonate plastic. Gage pointer and light shutter are mounted on helix and balancing counter Weight.

MORE ABOUT THIS ITEM

The Photohelic Switch/Gauge functions as versatile, highly repeatable pressure switches combined with a precise pressure gauge employing the time-proven Magnehelic gauge design. The Photohelic switch/gauge measures and controls positive, negative or differential pressures of air and compatible gases. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust setpoint indicators are controlled by knobs located on the gauge face. Individual setpoint deadband is one pointer width - less than 1% of full scale. Setpoints can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gauge reading is continuous and unaffected by switch operation, even during loss of electrical power. In typical applications, these switch/gauges control between high and low pressure set points. When pressure changes, reaching either set point pressure, the infrared light to the limiting phototransistor is cut off by the helix-driven light shutter. The resulting phototransistor signal is electronically amplified to actuate its DPDT slave relay and switching occurs. Dead band between make and break is 1% of full scale or less - just enough to assure positive, chatter-free operation. A plastic housing protects all electronic components. Solid-state and integrated circuit electronics are on glass-epoxy printed circuit boards and self-extinguishing terminal boards.

Photohelic switch/gauges are used to control pressures in air conditioning systems, clean rooms, fluidic and pneumatic control systems, materials handling equipment, alarm or control fume exhaust systems, control pressure in air structures, and monitor respiratory and blood pressures.

Warning: This product is not approved or intended for, and should not be used for medical, clinical, surgical or other patient oriented applications.

Dwyer A3002 Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20"Hg to 25 psig(-0.677 to 1.72 bar), MP option; 35 psig (2.41 bar), HP option;80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F(-28 to 48.9C) with low temperature option

Process Connections: female NPT

Dimensions:4"(101.6 mm) dial face, 5 x 8"(127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3010 Photohelic Pressure Switch Gauge Range 0-10 Inch w.c.

Dwyer A3010 Photohelic Pressure Switch/Gauge (0-10"w.c.)

Model: A3010

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Cover is clear polycarbonate plastic. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3010 Pressure switch/gage, range 0-10

The Dwyer A3010 Pressure Switch/Gauge has a range of 0-8" w.c.

Photohelic Switch/Gauges function as versatile, highly repeatable pressure switches combined with a precise pressure gauge employing the time-proven Magnehelic gauge design.The Photohelic switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Single pressure 36000S models measure to 6000 psig (413 bar) with a 9000 psig (620 bar) rating. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gauge face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gauge reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25" (0-6 mm)w.c. up to 30 psi (21 bar); single positive pressure to 6000 psig (413 bar).

Photohelic Sensing - How It Works

In typical applications, these Dwyer switch/gages control between high and low pressure set points. When pressure changes, reaching either set point pressure, the infrared light to the limiting phototransistor is cut off by the helix-driven light shutter. The resulting phototransistor signal is electronically amplified to actuate its DPDT slave relay and switching occurs. Dead band between make and break is 1% of full scale or less - just enough to assure positive, chatter-free operation.

Relay-Transformer Features

A plastic housing protects all electronic components.Solid-state and integrated circuit electronics are on glass-epoxy printed circuit boards and self-extinguishing terminal boards.

Dwyer A3010 Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position.Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig(-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections: female NPT

Dimensions:4" (101.6 mm) dial face, 5 x 8"(127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3000-100CM Photohelic Pressure Switch Gauge Range 0-100 cm w.c.

Dwyer Instruments A3000-100CM

Photohelic Pressure Switch/Gage Range 0-100 cm w.c

Photohelic Switch/Gages function as versatile, Highly Repeatable Pressure Switches combined with a precise Pressure Gage employing the time-proven Magnehelic Gage Design. The Photohelic switch/Gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Single pressure 36000S models measure to 6000 psig (413 bar) with a 9000 psig (620 bar) rating. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25" (0-6 mm) w.c. up to 30 psi (21 bar); single positive pressure to 6000 psig (413 bar).

Availability: Item ships in about Ships in 4-6 weeks

Product Highlights

Range 0-100 cm w.c.

Specifications

GAGE SPECIFICATIONS

Service:Air and non-combustible, compatible gases.

Wetted Materials:Consult Factory.

Accuracy:2% of FS at 70F (21.1C).3% on -0 and 4% on -00 models.

Pressure Limits:-20" Hg.to 25 psig (-0.677 to 1.72 bar).MP option;35 psig (2.41 bar), HP option; 80 psig (5.52 bar).

Temperature Limits:20 to 120F.(-6.67 to 48.9C).-20 to 120F (-28 to 48.9C) with low temperature option.

Process Connections:1/8" female NPT.

Size:4"(101.6 mm) dial face, 5"(127 mm) O.D. x 8-1/4"(209.55 mm).

Weight:4lb (1.81 kg).

SWITCH SPECIFICATIONS

Switch Type:Each setpoint has 2 Form C relays (DPDT).

Repeatability:1% of FS.

Electrical Rating:10 A @ 28 VDC, 10 A @ 120, 240 VAC.

Electrical Connections:Screw terminals.

Use 167F (75C) copper conductors only.

Power Requirements:120 VAC, 50/60 Hz; 240 VAC & 24 VAC power optional.

Mounting Orientation:Diaphragm in vertical position.Consult factory for other position orientations.

Set Point Adjustment:Adjustable knobs on face.

Agency Approvals:CE, CSA, UL.

Dwyer A3220 Photohelic Pressure Switch Gauge Range 0-20 psi

Dwyer A3220 Photohelic Pressure Switch/Gauge (0-20 psi)

Model: A3220

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Cover is clear polycarbonate plastic. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3220 Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3220 Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals. Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position.Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig (-0.677 to 1.72 bar), MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:? female NPT

Dimensions:4" (101.6 mm) dial face, 5 x 8" (127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3300-500PA Photohelic Pressure Switch Gauge Range 250-0-250 Pa.

Dwyer A3300-500PA Photohelic Pressure Switch/Gauge (250-0-250 Pa.)

Model: A3300-500PA

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic Switch/Gage set point

Mechanism. Cover is Clear Polycarbonate Plastic.Gage Pointer and Light Shutter Are Mounted on Helix and Balancing

Counterweight.

Dwyer A3300-500PA

Features

Measure 4 to 20 mA Signals Without "Breaking the Loop"

Measure mA Signals For PLC and Control System Analog I/O

Dual Backlit Display With Both mA Measurement And Percent of 4 to 20 mA Span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3300-500PA Specifications

Switch Specifications

Switch Type:Each Set Point Has 2 Form C Relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw Terminals.Use 167F (75C) Copper Conductors Only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in Vertical Position. Consult Factory For Other Position Orientations

Set Point Adjustment:Adjustable Knobs On Face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air And Non Combustible, Compatible Gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20"Hg to 25 psig(-0.677 to 1.72 bar), MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F. (-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:female NPT

Dimensions:4"(101.6 mm) Dial Face, 5 x 8"(127 x 209.55 MM)

Weight:4 lb (1.81 kg)

Dwyer A3304 Photohelic Pressure Switch Gauge Range 2-0-2 Inch w.c.

Dwyer A3304 Photohelic Pressure Switch/Gauge (2-0-2 Inch w.c.)

Model: A3304

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic Switch/Gage set point

Mechanism. Cover is Clear Polycarbonate Plastic. Gage Pointer and Light Shutter Are Mounted on Helix and Balancing

Counterweight.

Dwyer A3304

Features

Measure 4 to 20 mA Signals Without "Breaking the Loop"

Measure mA Signals For PLC and Control System Analog I/O

Dual Backlit Display With Both mA Measurement And Percent of 4 to 20 mA Span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3304 Specifications

Switch Specifications

Switch Type:Each Set Point Has 2 Form C Relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw Terminals. Use 167F (75C) Copper Conductors Only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in Vertical Position. Consult Factory For Other Position Orientations

Set Point Adjustment:Adjustable Knobs On Face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air And Non Combustible, Compatible Gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig (-0.677 to 1.72 bar), MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F. (-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:? female NPT

Dimensions:4" (101.6 mm) Dial Face, 5 x 8" (127 x 209.55 MM)

Weight:4 lb (1.81 kg)

Dwyer A3210 Photohelic Pressure Switch Gauge Range 0-10 psi

Dwyer A3210 Photohelic Pressure Switch/Gauge (0-10 psi)

Model: A3210

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Cover is clear polycarbonate plastic. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3210 Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3210 Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig (-0.677 to 1.72 bar), MP option; 35 psig (2.41 bar), HP option;80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:? female NPT

Dimensions:4"(101.6 mm)dial face, 5 x 8" (127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3000-300CM Photohelic Pressure Switch/Gauge (0-300cm w.c.)

Model: A3000-300CM

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3000-300CM Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3000-300CM Offers Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability: 1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals. Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position.Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy: 2% of FS at 70 F (21.1 C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig (-0.677 to 1.72 bar), MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120 F. (-6.67 to 48.9 C), -20 to 120F (-28 to 48.9 C) with low temperature option

Process Connections: female NPT

Dimensions:4"(101.6 mm) dial face, 5 x 8" (127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3000-200CM Photohelic Pressure Switch Gauge Range 0-200 cm w.c.

Photohelic Pressure Switch/Gage Range 0-200 cm w.c.

Order : A3000-200CM

Mfg : A3000-200CM

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3000-200CM Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3000-200CM Offers Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability: 1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals. Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position.Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy: 2% of FS at 70 F (21.1 C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig (-0.677 to 1.72 bar), MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120 F. (-6.67 to 48.9 C), -20 to 120F (-28 to 48.9 C) with low temperature option

Process Connections: female NPT

Dimensions:4"(101.6 mm) dial face, 5 x 8" (127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3203 Photohelic Pressure Switch Gauge Range 0-3 psi

Dwyer A3203 Photohelic Pressure Switch/Gauge (0-3 psi)

Model: A3203

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Cover is clear polycarbonate plastic. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3203 Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3203 Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals. Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position.Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig (-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:female NPT

Dimensions:4"(101.6 mm) dial face, 5 x 8" (127 x 209.55 mm)

Weight:4lb(1.81 kg)

Dwyer A3300-1KPA Photohelic Pressure Switch Gauge Range .5-0-.5 kPa.

Dwyer A3300-1KPA Photohelic Pressure Switch/Gauge (.5-0-.5 kPa.)

Model: A3300-1KPA

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic Switch/Gage set point

Mechanism. Cover is Clear Polycarbonate Plastic. Gage Pointer and Light Shutter Are Mounted on Helix and Balancing

Counterweight.

Dwyer A3300-1KPA Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3300-1KPA Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals. Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air And Non Combustible, Compatible Gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20"Hg to 25 psig (-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F. (-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:female NPT

Dimensions:4" (101.6 mm) dial face, 5 x 8"(127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3000-3KPA Photohelic Pressure Switch Gauge Range 0-3 kPa.

Dwyer A3000-3KPA Photohelic Pressure Switch/Gauge (0-3 kPa)

Model: A3000-3KPA

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic Switch/Gage set point mechanism. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3000-3KPA Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3000-3KPA Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and Non Combustible, Compatible Gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig(-0.677 to 1.72 bar), MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F(-28 to 48.9C) With Low Temperature Option

Process Connections:Female NPT

Dimensions:4"(101.6 mm) dial face, 5 x 8"(127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3100 Photohelic Pressure Switch Gauge Range 0-100 Inch w.c.

Dwyer A3100 Photohelic Pressure Switch/Gauge (0-100"w.c.)

Model: A3100

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Cover is clear polycarbonate plastic. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3100 Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3100 Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position.Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig (-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F. (-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:? female NPT

Dimensions:4"(101.6 mm) dial face, 5 x 8"(127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3000-10MM Photohelic Pressure Switch Gauge Range 0-10 mm w.c.

Dwyer Instruments A3000-10MM

Photohelic Pressure Switch/Gage Range 0-10 mm w.c.

Order #: A3000-10MM

Mfg #: A3000-10MM

Photohelic Switch/Gages function as versatile, highly repeatable pressure switches combined with a precise pressure gage employing the time-proven Magnehelic gage design. The Photohelic switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Single pressure 36000S models measure to 6000 psig (413 bar) with a 9000 psig (620 bar) rating. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25" (0-6 mm) w.c. up to 30 psi (21 bar); single positive pressure to 6000 psig (413 bar).

Availability: Item ships in about Ships in 4-6 weeks

Product Highlights

Range 0-10 mm w.c.

Specifications

GAGE SPECIFICATIONS

Service:Air and Non-Combustible, Compatible Gases.

Wetted Materials:Consult Factory.

Accuracy:2% of FS at 70F (21.1C).3% on -0 and 4% on -00 models.

Pressure Limits:-20" Hg. to 25 psig (-0.677 to 1.72 bar). MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar).

Temperature Limits:20 to 120F. (-6.67 to 48.9C).-20 to 120F (-28 to 48.9C) with low temperature option.

Process Connections:1/8"female NPT.

Size:4"(101.6 mm) dial face, 5"(127 mm)O.D. x 8-1/4"(209.55 mm).

Weight:4 lb (1.81 kg).

SWITCH SPECIFICATIONS

Switch Type:Each setpoint has 2 Form C relays (DPDT).

Repeatability:1% of FS.

Electrical Rating:10 A @ 28 VDC, 10 A @ 120, 240 VAC.

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only.

Power Requirements:120 VAC, 50/60 Hz;240 VAC & 24 VAC power optional.

Mounting Orientation:Diaphragm in vertical position.Consult factory for other position orientations.

Set Point Adjustment:Adjustable knobs on face.

Agency Approvals:CE, CSA, UL.

Dwyer A3310 Photohelic Pressure Switch Gauge Range 5-0-5 Inch w.c.

Dwyer A3310 Photohelic Pressure Switch/Gauge (5-0-5 Inch w.c.)

Model: A3310

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic Switch/Gage set point

Mechanism. Cover is Clear Polycarbonate Plastic. Gage Pointer and Light Shutter Are Mounted on Helix and Balancing

Counterweight.

Dwyer A3310

Features

Measure 4 to 20 mA Signals Without "Breaking the Loop"

Measure mA Signals For PLC and Control System Analog I/O

Dual Backlit Display With Both mA Measurement And Percent of 4 to 20 mA Span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3310 Specifications

Switch Specifications

Switch Type:Each Set Point Has 2 Form C Relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw Terminals.Use 167F (75C) Copper Conductors Only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in Vertical Position. Consult Factory For Other Position Orientations

Set Point Adjustment:Adjustable Knobs On Face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air And Non Combustible, Compatible Gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20"Hg to 25 psig(-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option;80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:? female NPT

Dimensions:4"(101.6 mm) Dial Face, 5 x 8" (127 x 209.55 MM)

Weight:4 lb (1.81 kg)

Dwyer A3003 Photohelic Pressure Switch Gauge Range 0-3.0 Inch w.c.

Dwyer A3003 Photohelic Pressure Switch/Gauge (0-3.0"w.c.)

Model: A3003

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic Switch/Gage set point mechanism. Cover is clear polycarbonate plastic. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3003 Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3003 Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position.Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig (-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option;80 psig (5.52 bar)

Temperature Limits:20 to 120F. (-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:? female NPT

Dimensions:4"(101.6 mm) dial face, 5 x 8"(127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3000-25KPA Photohelic Pressure Switch/Gauge (0-25 kPa)

Model: A3000-25KPA

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3000-25KPA Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3000-25KPA Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals. Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position.Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20"Hg to 25 psig(-0.677 to 1.72 bar), MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F(-28 to 48.9C)with low temperature option

Process Connections:female NPT

Dimensions:4"(101.6 mm)dial face, 5 x 8"(127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3000-250CM Photohelic Pressure Switch Gauge Range 0-250 cm w.c.

Dwyer Instruments A3000-250CM

Photohelic Pressure Switch/Gage Range 0-250 cm w.c.

Order #: A3000-250CM

Mfg #: A3000-250CM

PhotohelicSwitch/Gages function as versatile, highly repeatable pressure switches combined with a precise pressure gage employing the time-proven Magnehelic gage design. The Photohelic switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Single pressure 36000S models measure to 6000 psig (413 bar) with a 9000 psig (620 bar) rating. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25" (0-6 mm) w.c. up to 30 psi (21 bar); single positive pressure to 6000 psig (413 bar).

Product Highlights

Range: 0-250 cm w.c.

Dwyer A3000-250CM Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig (-0.677 to 1.72 bar), MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.

67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:female NPT

Dimensions:4"(101.6 mm) dial face, 5 x 8" (127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3000-15KPA Photohelic Pressure Switch Gauge Range 0-15 kPa.

Dwyer Instruments: A3000-15KPA

Photohelic Pressure Switch/Gage Range 0-15 kPa.

Order: A3000-15KPA

Mfg: A3000-15KPA

Photohelic Switch/Gages Function as versatile, highly repeatable Pressure Switches combined with a precise Pressure Gage employing the time-proven Magnehelic gage design. The Photohelic switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Single pressure 36000S models measure to 6000 psig (413 bar) with a 9000 psig (620 bar) rating. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25" (0-6 mm) w.c. up to 30 psi (21 bar); single positive pressure to 6000 psig (413 bar).

Availability: Item ships in about Ships in 4-6 weeks

Product Highlights

Range: 0-15 kPa.

Gage Specifications

Service:Air and non-combustible, compatible gases

Range:0-150 cm w.c.

Accuracy:2% of FS at 70F (21.1C)

Pressure Limits:-20" Hg.to 25 psig (-0.677 to 1.72 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C)

Process Connections:1/8" female NPT

Size:4" (101.6 mm) dial face, 5" (127 mm) O.D. x 8-1/4" (209.55 mm)

Weight:4lb (1.81 kg)

Switch Specifications

Switch Type:Each setpoint has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10A @ 28 VDC, 10A @ 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F(75C) copper conductors only

Power Requirements:120 VAC, 60 Hz

Mounting Orientation:Diaphragm in vertical position

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Dwyer A3000-00 Photohelic Pressure Switch Gauge Range 0-.25 Inch w.c./300-2000 FPM

Photohelic Switch/Gages function as versatile, highly repeatable pressure switches combined with a precise pressure gage employing the time-proven Magnehelic gage design. The Photohelic switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Single pressure 36000S models measure to 6000 psig (413 bar) with a 9000 psig (620 bar) rating. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25" (0-6 mm) w.c. up to 30 psi (21 bar); single positive pressure to 6000 psig (413 bar).

Availability: Item ships in about Ships in 4-6 Weeks

Dwyer A3000-00AV Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3000-00AV Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability: 1% of FS

Electrical Rating:10 A at 28 VDC 10 A at 120 240 VAC

Electrical Connections:Screw terminals. Use 167 F (75 C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals :CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70 F (21.1 C)3% on -04% on -00 models

Pressure Limits : -20" Hg to 25 psig (-0.677 to 1.72 bar)

MP option; 35 psig (2.41 bar)

HP option; 80 psig (5.52 bar)

Temperature Limits :20 to 120 F.(-6.67 to 48.9C)-20 to 120 F (-28 to 48.9C) with low temperature option

Process Connections : female NPT

Dimensions :4" (101.6 mm) dial face 5 x 8 " (127 x 209.55 mm)

Weight :4 lb (1.81 kg)

Dwyer Series A3000-0 Photohelic Pressure Switch Gage 0-.50" w.c.

Photohelic Switch/Gages function as versatile, highly repeatable pressure switches combined with a precise pressure gage employing the time-proven Magnehelic gage design. The Photohelic switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Single pressure 36000S models measure to 6000 psig (413 bar) with a 9000 psig (620 bar) rating. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25" (0-6 mm) w.c. up to 30 psi (21 bar); single positive pressure to 6000 psig (413 bar).

Availability: Item ships in about Ships in 4-6 Weeks

Dwyer A3000-0 0-.50" w.c.

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3000-0 0-.50" w.c.

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability: 1% of FS

Electrical Rating:10 A at 28 VDC 10 A at 120 240 VAC

Electrical Connections:Screw terminals. Use 167 F (75 C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals :CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70 F (21.1 C)3% on -04% on -00 models

Pressure Limits : -20" Hg to 25 psig (-0.677 to 1.72 bar)

MP option; 35 psig (2.41 bar)

HP option; 80 psig (5.52 bar)

Temperature Limits :20 to 120 F.(-6.67 to 48.9C)-20 to 120 F (-28 to 48.9C) with low temperature option

Process Connections : female NPT

Dimensions :4" (101.6 mm) dial face 5 x 8 " (127 x 209.55 mm)

Weight :4 lb (1.81 kg)

Dwyer A3000-750PA Photohelic Pressure Switch Gauge Range 0-750 Pa.

Dwyer A3000-750PA-240VAC Photohelic Pressure Switch/Gauge (0-750 Pa), 220/240 VAC Relay Pack

Model: A3000-750PA-240VAC

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Cover is clear polycarbonate plastic.Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3000-750PA-240VAC Series A3000 Photohelic Pressure Switch 0 to 750 Pa

The Dwyer A3000-750PA-240VAC has a range from 0-750 Pa and 220/240 VAC Relay Pack.

Photohelic Switch/Gauges function as versatile, highly repeatable pressure switches combined with a precise pressure gauge employing the time-proven Magnehelic gauge design. The Photohelic switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Single pressure 36000S models measure to 6000 psig (413 bar) with a 9000 psig (620 bar) rating. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gauge face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gauge reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25" (0-6 mm) w.c.up to 30 psi (21 bar); single positive pressure to 6000 psig (413 bar).

Photohelic Sensing - How It Works

In typical applications, these Dwyer switch/gages control between high and low pressure set points. When pressure changes, reaching either set point pressure, the infrared light to the limiting phototransistor is cut off by the helix-driven light shutter. The resulting phototransistor signal is electronically amplified to actuate its DPDT slave relay and switching occurs. Dead band between make and break is 1% of full scale or less - just enough to assure positive, chatter-free operation.

Relay-Transformer Features

A plastic housing protects all electronic components. Solid-state and integrated circuit electronics are on glass-epoxy printed circuit boards and self-extinguishing terminal boards.

Dwyer A3000-750PA Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20"Hg to 25 psig(-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option;80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F(-28 to 48.9C) with low temperature option

Process Connections:female NPT

Dimensions:4"(101.6 mm) dial face, 5 x 8"(127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3000-20CM Photohelic Pressure Switch Gauge Range 0-20 cm w.c.

Photohelic Pressure Switch/Gage Range 0-20 cm w.c.

Order : A3000-20CM

Mfg : A3000-20CM

Photohelic Switch/Gages function as versatile, highly repeatable pressure switches combined with a precise pressure gage employing the time-proven Magnehelic Gage design. The Photohelic Switch/Gage measures and controls positive, negative or Differential Pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Single pressure 36000S models measure to 6000 psig (413 bar) with a 9000 psig (620 bar) rating. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25" (0-6 mm) w.c. up to 30 psi (21 bar); single positive pressure to 6000 psig (413 bar).

Availability: Item ships in about Ships in 4-6 weeks

Product Highlights

Range: 0-20 cm w.c.

Gage Specifications

Service:Air and non-combustible, compatible gases

Range: 0-200 cm w.c.

Accuracy:2% of FS at 70F (21.1C)

Pressure Limits:-20" Hg. to 25 psig (-0.677 to 1.72 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C)

Process Connections:1/8" female NPT

Size:4" (101.6 mm) dial face, 5" (127 mm) O.D.x 8-1/4" (209.55 mm)

Weight:4 lb (1.81 kg)

Switch Specifications

Switch Type:Each setpoint has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10A @ 28 VDC, 10A @ 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 60 Hz

Mounting Orientation:Diaphragm in vertical position

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Dwyer A3300-3KPA Photohelic Pressure Switch Gauge Range 1.5-0-1.5 kPa.

Dwyer A3300-3KPA Photohelic Pressure Switch/Gauge (1.5-0-1.5 kPa.)

Model: A3300-3KPA

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic Switch/Gage set point

Mechanism. Cover is Clear Polycarbonate Plastic. Gage Pointer and Light Shutter Are Mounted on Helix and Balancing

Counterweight.

Dwyer A3300-3KPA

Features

Measure 4 to 20 mA Signals Without "Breaking the Loop"

Measure mA Signals For PLC and Control System Analog I/O

Dual Backlit Display With Both mA Measurement And Percent of 4 to 20 mA Span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3300-3KPA Specifications

Switch Specifications

Switch Type:Each Set Point Has 2 Form C Relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw Terminals.Use 167F (75C) Copper Conductors Only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in Vertical Position. Consult Factory For Other Position Orientations

Set Point Adjustment:Adjustable Knobs On Face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air And Non Combustible, Compatible Gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig (-0.677 to 1.72 bar), MP option; 35 psig (2.41 bar), HP option;80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:? female NPT

Dimensions:4"(101.6 mm) Dial Face, 5 x 8"(127 x 209.55 MM)

Weight:4 lb(1.81 kg)

Dwyer A3004 Photohelic Pressure Switch Gauge Range 0-4.0 Inch w.c.

Dwyer A3004 Photohelic Pressure Switch/Gauge (0-4.0"w.c.)

Model: A3004

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3004 Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3004 Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position.Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20"Hg to 25 psig (-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option;80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:female NPT

Dimensions:4" (101.6 mm) dial face, 5 x 8" (127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3000-60PA Photohelic Pressure Switch Gauge Range 0-60 Pa.

Dwyer A3000-60PA-240VAC Photohelic Pressure Switch/Gauge (0-60 Pa), 220/240 VAC Relay Pack

Model: A3000-60PA-240VAC

Bezel and Front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic Switch/Gage set point mechanism. Cover is clear polycarbonate plastic. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3000-60PA-240VAC Series A3000 Photohelic Pressure Switch 0 to 60 PA

The Dwyer A3000-60PA-240VAC has a range from 0-60 Pa and 220/240 VAC Relay Pack.

Photohelic Switch/Gauges function as versatile, highly repeatable pressure switches combined with a precise pressure gauge employing the time-proven Magnehelic gauge design. The Photohelic switch/gage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Single pressure 36000S models measure to 6000 psig (413 bar) with a 9000 psig (620 bar) rating. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust set point indicators are controlled by knobs located on the gauge face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gauge reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25"(0-6 mm) w.c.up to 30 psi (21 bar); single positive pressure to 6000 psig (413 bar).

Photohelic Sensing - How It Works

In typical applications, these Dwyer switch/gages control between high and low pressure set points. When pressure changes, reaching either set point pressure, the infrared light to the limiting phototransistor is cut off by the helix-driven light shutter. The resulting phototransistor signal is electronically amplified to actuate its DPDT slave relay and switching occurs. Dead band between make and break is 1% of full scale or less - just enough to assure positive, chatter-free operation.

Relay-Transformer Features

A plastic housing protects all electronic components. Solid-state and integrated circuit electronics are on glass-epoxy printed circuit boards and self-extinguishing terminal boards.

Dwyer A3000-60PA Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F(75C)copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F(21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20"Hg to 25 psig(-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option;80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F(-28 to 48.9C) with low temperature option

Process Connections:female NPT

Dimensions:4"(101.6 mm) dial face, 5 x 8"(127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3320 Photohelic Pressure Switch Gauge Range 10-0-10 Inch w.c.

Dwyer A3320 Photohelic Pressure Switch/Gauge (10-0-10 Inch w.c.)

Model: A3320

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic Switch/Gage set point

Mechanism. Cover is Clear Polycarbonate Plastic.Gage Pointer and Light Shutter Are Mounted on Helix and Balancing

Counterweight.

Dwyer A3320

Features

Measure 4 to 20 mA Signals Without "Breaking the Loop"

Measure mA Signals For PLC and Control System Analog I/O

Dual Backlit Display With Both mA Measurement And Percent of 4 to 20 mA Span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3320 Specifications

Switch Specifications

Switch Type:Each Set Point Has 2 Form C Relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw Terminals.Use 167F (75C) Copper Conductors Only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in Vertical Position. Consult Factory For Other Position Orientations

Set Point Adjustment:Adjustable Knobs On Face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air And Non Combustible, Compatible Gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig (-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option;80 psig (5.52 bar)

Temperature Limits:20 to 120F. (-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:? female NPT

Dimensions:4" (101.6 mm) Dial Face, 5 x 8"(127 x 209.55 MM)

Weight:4 lb (1.81 kg)

Dwyer A3302 Photohelic Pressure Switch Gauge Range 1-0-1 Inch w.c.

Dwyer A3302 Photohelic Pressure Switch/Gauge (1-0-1 Inch w.c.)

Model: A3302

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic Switch/Gage set point

Mechanism.Cover is Clear Polycarbonate Plastic.Gage Pointer and Light Shutter Are Mounted on Helix and Balancing

Counterweight.

Dwyer A3302

Features

Measure 4 to 20 mA Signals Without "Breaking the Loop"

Measure mA Signals For PLC and Control System Analog I/O

Dual Backlit Display With Both mA Measurement And Percent of 4 to 20 mA Span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3302 Specifications

Switch Specifications

Switch Type:Each Set Point Has 2 Form C Relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw Terminals.Use 167F (75C) Copper Conductors Only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in Vertical Position. Consult Factory For Other Position Orientations

Set Point Adjustment:Adjustable Knobs On Face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air And Non Combustible, Compatible Gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20"Hg to 25 psig (-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option;80 psig (5.52 bar)

Temperature Limits:20 to 120F. (-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:? female NPT

Dimensions:4"(101.6 mm) Dial Face, 5 x 8" (127 x 209.55 MM)

Weight:4 lb (1.81 kg)

Dwyer A3215 Photohelic Pressure Switch Gauge Range 0-15 psi

Dwyer A3215 Photohelic Pressure Switch/Gauge (0-15 psi)

Model: A3215

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Cover is clear polycarbonate plastic. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3215 Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3215 Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F (75C) copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F (21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20" Hg to 25 psig (-0.677 to 1.72 bar), MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar)

Temperature Limits:20 to 120F. (-6.67 to 48.9C), -20 to 120F (-28 to 48.9C) with low temperature option

Process Connections:? female NPT

Dimensions:4" (101.6 mm) dial face, 5 x 8" (127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3001 Photohelic Pressure Switch Gauge Range 0-1.0 Inch w.c

Dwyer A3001 Photohelic Pressure Switch/Gauge, 0-1" WC, 1/8" NPT(F)

Dwyer Mfr # A3001 Item # WW-68062-26

3-in-One Indicating gauge, low-limit and high-limit control

set points and zero are easily adjusted on front of gauge

MORE ABOUT THIS ITEM

The Photohelic Switch/Gauge functions as versatile, highly repeatable pressure switches combined with a precise pressure gauge employing the time-proven Magnehelic gauge design. The Photohelic switch/gauge measures and controls positive, negative or differential pressures of air and compatible gases. Two phototransistor actuated, DPDT relays are included for low/high limit control. Easy to adjust setpoint indicators are controlled by knobs located on the gauge face. Individual setpoint deadband is one pointer width - less than 1% of full scale.Setpoints can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc.Gauge reading is continuous and unaffected by switch operation, even during loss of electrical power.In typical applications, these switch/gauges control between high and low pressure set points. When pressure changes, reaching either set point pressure, the infrared light to the limiting phototransistor is cut off by the helix-driven light shutter. The resulting phototransistor signal is electronically amplified to actuate its DPDT slave relay and switching occurs. Dead band between make and break is 1% of full scale or less - just enough to assure positive, chatter-free operation. A plastic housing protects all electronic components. Solid-state and integrated circuit electronics are on glass-epoxy printed circuit boards and self-extinguishing terminal boards.

Photohelic Switch/Gauges are used to control pressures in air conditioning systems, clean rooms, fluidic and pneumatic control systems, materials handling equipment, alarm or control fume exhaust systems, control pressure in air structures, and monitor respiratory and blood pressures.

Warning: This product is not approved or intended for, and should not be used for medical, clinical, surgical or other patient oriented applications.

Specifications & Description

Accuracy:2% full-scale at 70F (21C)

Dial Size:(in)4

Dial Size:(mm)102

Min Pressure:(in WC)0

Max Pressure:(in WC)1

Min Temperature:(F)20

Max Temperature:(F)120

Min Temperature:(C)7

Max Temperature:(C)60

Case:Aluminum

Lens:Material Polycarbonate

Process Connection:1/8" NPT(F)

Unit Of Measurement":WC

Display:Analog dial

Battery Type:120 VAC, 50/60 Hz

Electrical Connections:Screw terminal

Switch output:10 A at 120/240 VAC/28 VDC

Output:DPDT

Media:Compatibility Air and noncombustible, noncorrosive gases

Description:Photohelic Pressure Switch/Gauge, 0-1" WC, 1/8" NPT(F)

Dwyer A3000-80CM Photohelic Pressure Switch Gauge Range 0-80 cm w.c.

Dwyer A3000-80CM Photohelic Pressure Switch/Gauge (0-80cm w.c.)

Model: A3000-80CM

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3000-80CM Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3000-80CM Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F(75C)copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F(21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20"Hg to 25 psig(-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option;80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F(-28 to 48.9C) with low temperature option

Process Connections:female NPT

Dimensions:4"(101.6 mm) dial face, 5 x 8"(127 x 209.55 mm)

Weight:4 lb (1.81 kg)

Dwyer A3000-6MM Photohelic Pressure Switch Gauge Range 0-6 mm w.c.

Dwyer A3000-6MM Photohelic Pressure Switch/Gauge (0-6mm w.c.)

Model: A3000-6MM

Bezel and front cover (with set point knobs and zero adjustment screw) removed to expose Photohelic switch/gage set point mechanism. Gage pointer and light shutter are mounted on helix and balancing counterweight.

Dwyer A3000-6MM Offers

Features

Measure 4 to 20 mA signals without "breaking the loop"

Measure mA signals for PLC and control system analog I/O

Dual backlit display with both mA measurement and percent of 4 to 20 mA span

Measurement Spotlight illuminates hard to see wires in dark enclosures

Detachable clamp with extension cable for measurements in tight locations

Measure 10 to 50 mA signals in older control systems using the 99.9 mA range

Automatically change the 4 to 20 mA output for remote testing

Power saving features, auto-off, backlight timeout extend battery life

Hold function captures and displays changing measurements

Applications

Air Conditioner Systems

Clean Rooms

Fume Exhaust Systems

Dwyer A3000-6MM Specifications

Switch Specifications

Switch Type:Each set point has 2 Form C relays (DPDT)

Repeatability:1% of FS

Electrical Rating:10 A at 28 VDC, 10 A at 120, 240 VAC

Electrical Connections:Screw terminals.Use 167F(75C)copper conductors only

Power Requirements:120 VAC, 50/60 Hz, 240 VAC and 24 VAC power optional

Mounting Orientation:Diaphragm in vertical position. Consult factory for other position orientations

Set Point Adjustment:Adjustable knobs on face

Agency Approvals:CE, CSA, UL

Gauge Specifications

Service:Air and non-combustible, compatible gases

Accuracy:2% of FS at 70F(21.1C), 3% on -0, 4% on -00 models

Pressure Limits:-20"Hg to 25 psig(-0.677 to 1.72 bar), MP option;35 psig (2.41 bar), HP option;80 psig (5.52 bar)

Temperature Limits:20 to 120F.(-6.67 to 48.9C), -20 to 120F(-28 to 48.9C) with low temperature option

Process Connections:female NPT

Dimensions:4"(101.6 mm) dial face, 5 x 8"(127 x 209.55 mm)

Weight:4 lb (1.81 kg)