Vibrating Fork Level Switch (LFV)

Extensions TubeSS 304, SS 316, SS 316L
Process ConnectionsNPT / BSP / Hygienic ½", ¾", 1", 1¼", 1½", & Flanged ANSI/JIS/DIN/ASA/custom
Max. Viscosity10,000 cStokes (= cPose/(g/cm3)), (Higher viscosity available on request)
Process Temp.-20°C ... 80°C (-4°F ... 176 °F)
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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Material & Length50mm to 3,000mm
Extended Process-30°C ... 200°C (-22°F ... 392 °F)
Ambient Temp.-20°C ... 70°C (-4°F ... 158 °F)
Process Temp.-20°C ... 80°C (-4°F ... 176 °F)
Extensions TubeSS 304, SS 316, SS 316L
Temperature(extensions & heat sinks required)
Max. Viscosity10,000 cStokes (= cPose/(g/cm3)), (Higher viscosity available on request)
Process Pressureabsolute / max. 15 bar
Wetted PartsSS 316 or SS 316L, PTFE, PFA, TEFZEL, HALAR
Vibration TestAs per IEC 60068 part 2-6 sinusoidal, 10-55Hz, 0.15mm
Process ConnectionsNPT / BSP / Hygienic ½", ¾", 1", 1¼", 1½", & Flanged ANSI/JIS/DIN/ASA/custom

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 of LFV.
Presence of liquid is thus detected.

Features :

Fast Switching Response 1 sec
½" screw mountings available
High pressure 15 bar forks
High Tempreture up-to 250°C available
Calibration-less operation
Remote electronics with std 10 meters cable length
External indication LED available
Threaded & Flanged Mountings
NAMUR (L-H / H-L) as per IEC-60947-5-6
Ingress protection : IP 68/65 (as per IS-13947)
Ex-proof (Ex d T6 IP-66 IIC )
- Flameproof as per IS/IEC 60079-1:2007
- Weatherproof (IP-66) as per IS/IEC 60529:2001
- Suitable for Gas Group - IIC
- Suitable for Zone 1 & 2 atmospheres