Compact Vibrating Fork Level Switch (LFV12)

Process Connections LFV12 (Material SS316)Threaded NPT / BSP ½", ¾", 1" Tri-Clamp 1"...1½", SMS Union 1" Flush Mounting 1", 1½"
Process PressureAbsolute / max. 15 bar
Max. Viscosity10, 000 cStokes (= cPose/(g/cm3)) (Higher viscosity available on request)
Sensor Insertion LengthLFV12 : 50 mm excluding threads
Supply TypeExporter, Supplier, Retailer
Preferred Buyer Location India, Benin, Egypt, South Africa, Argentina, Brazil, Canada, Mexico, United States, Afghanistan, Bahrain, Bangladesh, China, Hong Kong, India, Indonesia, Iran (Islamic Republic of), Iraq, Israel, Japan, Jordan, Kuwait, Malaysia, Nepal, Oman, Pakistan, Philippines, Saudi Ara bia, Singapore, Korea, Republic of, Sri Lanka, Syrian Arab Republic, Taiwan, Thailand, Turkey, United Arab Emirates, Viet Nam, Yemen, France, Germany, Greece, Italy, Netherlands, Poland, Romania, Russian Federation, Spain, Ukraine, United Kingdom, Australia, New Zealand

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External IndicationRed LED : Alarm Indicator, Green LED : Power On Indicator
Extensions TubeSS 316, SS 316L, SS 304
Enclosure Protection ClassIP-65/67 as per IS-13947
Ambient Temp.-20°C ... 70°C (-4°F ... 158°F)
Process PressureAbsolute / max. 15 bar
Enclosure MaterialSS316
Vibration Test0.15mm, As per IEC 60068 part 2-6 sinusoidal, 10-55Hz
Extended Process Temperature-30°C ... 150°C (-22°F ... 302°F) (extensions & heat sinks required)
Extended Process-30°C ... 200°C (-22°F ... 392 °F)
Process Connections LFV11 (Material SS316)Threaded NPT / BSP 1, Tri-Clamp 1½, Tri-Clamp 2
Material & Length000mm, 50mm to 3
Max. Viscosity10, 000 cStokes (= cPose/(g/cm3)) (Higher viscosity available on request)
Process Connections1¼, 1, ¾, 1½, & Flanged ANSI/JIS/DIN/ASA/custom, NPT / BSP / Hygienic ½
Sensor Insertion LengthLFV12 : 50 mm excluding threads
Process Temp.-20°C ... 80°C (-4°F ... 176°F)
Process Connections LFV12 (Material SS316)Threaded NPT / BSP ½", ¾", 1" Tri-Clamp 1"...1½", SMS Union 1" Flush Mounting 1", 1½"

Operating Principle :

Electronics of LFV excites the piezo-electric-crystals inside tuning fork, which makes the fork tines vibrate at their natural resonance frequency in free air.
When fork tines are immersed in liquid, the frequency of fork vibration falls due to the density of liquid.
This change in frequency is detected by electronic circuit.
Liquid presence is thus detected.

Features :

Applications :

Vibrating fork level limit switch used as a full, empty and demand alarm in fluid containers, tanks containing liquids of various types, including milk & milk products, edible oil, fuel oil, lube oil, brewery, pharmaceutical fluids etc. LFV11 can be used in solid also.
Also for Flow-No-Flow/Empty Pipe Detection.