Relative Humidity And Temperature Transmitter (Model 657-1)

Relative Humidity And Temperature Transmitter (Model 657-1)

model 657-1 relative humidity/temperature transmitter

dual channel design for simultaneous 4-20 ma output signals

the series 657 transmitters provide two 4 to 20 ma channels to produce separate output signals for both relative humidity and temperature. These devices deliver ±2% accuracy for humidity and ±1°f for temperature measurements. Stainless steel probe can be easily mounted to most ductwork using either of the two optional kits below.

product applications

cleanroom monitoring

hvac/building control monitoring

modeldescription

657-1relative humidity/temperature transmitter.

specifications

service:dry clean air.

range:relative humidity: 0-100%; temperature: 32 to 212°f (0 to 100°c).

accuracy:relative humidity: ±2% (10-90% rh), ±3% (0-10% and 90-100% rh); temperature: ±1°f (0.5°c).

enclosure temperature limit:32 to 140°f (0 to 60°c).

pressure limits:1 psi (.07 bar).

compensated temperature range:32 to 140°f (0 to 60°c).

power requirements:10-35 vdc.

output signal:2 channels each 4-20 ma. Loop powered on rh channel.

electrical connections:4 screw type terminal.

mounting orientation:mount in any position.

probe:5/16" x 10" (0.8 x 25.4 cm) stainless steel.

weight:5.5 oz (156 g).

features

polymer film humidity and thin film rtd temperature sensors offer highly reliable and stable measurements

remote mount housing offers installation flexibility (657-1)

rugged die-cast aluminum housing is great for industrial applications (657c-1)

accessories

model numberdescription

a-158split flange.

a-159mounting gland with 1/2" male npt.

Power Requirements:10-35 VDC. : Output Signal:2 channels each 4-20 mA. Loop powered on RH channel.

Service:Dry clean air. : Pressure Limits:1 psi (.07 bar).

Electrical Connection-4 screw type terminal. : Pressure (bar)-1 psi (.07 bar).

Compensated Temperature Range-32 to 140 Degree F (0 to 60 Degree C). : Power-10-35 VDC.

Probe-5/16" x 10" (0.8 x 25.4 cm) stainless steel. : Weight-5.5 oz (156 g).

Output Signal-2 channels each 4-20 mA. Loop powered on RH channel. : Mounting Orientation-Mount in any position.

Brand-Dwyer USA : Enclosure Temperature Limit-32 to 140 Degree F (0 to 60 Degree C)