Trumen Vibrating Fork Point Level Switch Supplier Manufacturer Exporter in India
                     ABOU FEATURE APPLICATIO OPERATIO TECHNICA CONTA
T S N N L CT
ABOUT LFV ABOUT TRUMEN
Trumen vibrating fork point level switch Trumen came into existence in 2009 and  
model  LFV suitable for all types of flow initially started with manufacturing of 
able liquids  in all process industries. It Tuning  Fork Level Switches for liquid and 
gives reliable  measurement and does not solid  applications. With time, the 
affected due to  material flow, vibrations in manufacturing  range increased with 
the tank, changing  the media properties and addition of Capacitance  Level Transmitter & 
material build-up in  the sensor. Capacitance Level  Switches, RF Admittance 
Level Switches,  Rotating Paddle Level 
Trumen LFV available in three different Switches, Conductivity  Type Level 
design  like ½”, ¾” and 1” depends upon Switches, Vibrating Rod Level  Switches, 
the mounting  requirements. Hydrostatic Level Transmitter, Radar.
KNOW MORE KNOW MORE
FEATURES
Compact Size.  
Calibration-less 
operation.
Universal power supply on same terminals (15 to 80VDC or 15 to 
260VAC).  Inbuilt settable switching delay 5 sec.
Tropicalized sealed electronics module & easy to maintenance.
Customized process connection threaded / flanged / hygienic & dairy fittings 
etc.  Various output options like transistor PNP/NPN , NAMUR, 8/16mA current 
 output. Etc.
APPROVALS
CE 
Certification.  
IP-68/ 66.
Exd Suitable for gas group IIC, T6 as per IEC 60079-1:2007 & IEC 
60529:2001.  Ex ia suitable for gas group IIC T6, as per, IS/IEC 60079-
11:2006.
Vibration test comply as per IEC standard 60068-Part 2-6.
Functionality and environmental test of all instruments RFI-EMC, voltage 
transient and  electrical functionality test as per IEC 61000.
APPROVALS
Trumen vibrating fork point level switch model LFV is used in different 
applications like -
ITrumen vibrating fork is used in different applications like, Water, oil, milk, 
chemicals,  solvents and liquids having viscosity up-to 10,000Cp.
Suitable for hazardous liquids & chemicals.
Process temperature maximum 200° C / 250° C (available on 
requirement).  Operating pressure 20 bar maximum.
OPERATING PRINCIPLE
Electronics of LFV When fork tines are  This change in 
excites  the piezoelectric immersed in liquid, the  frequency  is detected by 
crystals  inside the frequency of fork the  electronic circuit.
tuning fork  which makes vibration  falls due to 
the fork tines  vibrate at the density of  liquid.
their natural  resonance 
frequency in  free air.
OPERATION
Device operation and settings:  
Trumen LFV is very easy to 
1operatOepen the cover of Trumen LFV you can see there are 9 terminals. 
. Terminal  1, 2 & 3 are for auxiliary power supply. Terminal 4, 5, 6 & 7, 
8, 9 are for relay  output.
2 Connect the power supply either 15 to 80VDC or 15 to 260VAC on
. terminal 1 & 2 and plant earth on terminal number 3. Now switch on the 
3 power.  Trumen LFV starts vibrating in air. Power LED is on and status level 
. is in OFF  condition.
4 Now fill the liquid up-to the fork tines level.
. You can see the status LED of LFV is on means liquid reaches to the desired 
5 level.  Now empty the liquid, you can see the status LED is OFF means 
. material goes  below the desired level.
76. Relay status also change from NC to NO.
8. There are 4 DIP switches provided on connection panel. Via DIP switch no.1 we can set 
. the  sensitivity that means if the density of liquid is low density fluids we need to on 
switch  no.1 in this conditon LFV will sense the liquid. Keep it turned off for normal 
9 density fluids.  Switch no.2 is to set dry delay means off delay. ON the DIP switch 
. no.2 and empty the  material. LFV will wait for 5 sec once the material goes below the 
sensor and after 5 sec it  generates switching. During the delay cycle sensor ignore 
10 the turbulence.
. Switch no.3 is to set wet delay means on delay. ON the DIP switch no.3 and fill 
the  material. LFV will wait for 5 sec once the material touches the sensor and 
11 after 5 sec it  generates switching. During the delay cycle sensor ignore the 
. turbulence.
Switch no.4 is to set failsafe means the instrument should be in alarm condition if 
the  sensor faces power failure. When the sensor is installed for high level keep the 
12 DIP switch  no.4 is turned off i.e failsafe high or maximum and when the sensor is 
. installed for low  level keep the DIP switch no.4 turn on i.e. failsafe low or 
13 minimum.
. You can easily replace the electronics as shown
In case of any further technical support please contact our sales and support team.
Connection Terminals
+ of DC or Live of AC Supply input
- of DC or Neutral of AC Supply input 
Supply:  15 to 80VDC or 15 to 260VAC 
50/60Hz
Earth terminal for safety
Normally connected terminal of contact 
1  Common terminal of contact 1  
Normally open terminal of contact 1  
Normally connected terminal of contact 
2  Common terminal of contact 2  
Normally open terminal of contact 2
TYPICAL MOUNTING TYPICAL MOUNTING
TECHNICAL DATA &  INSTRUCTION MANUAL
TESTIMONIALS
WHAT OUR  
HAPPY CLIENTS 
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US
TRUMEN LFV USERS
TRUMEN EXPORT TO
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ABOUT LFV FEATURES APPLICATION OPERATING OPERATION TECHNICAL DATA & TRUMENT AT 
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39, Mangal Nagar, Behind Sai Ram Plaza, 0731-4972065, +91-7049333121, suppor
 AB Road, Indore, Madhya Pradesh +91-7389933120, +91-8109062425 [email protected]  
[email protected]
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