Two-Wire Capacitance Continuous Level Transmitter (Model : TLC)

The probe forms a capacitance with the metallic tank-wall. The capacitance is sum of three capacitance.


  • Compact size.
  • Rigid rod/flexible rope versions.
  • Wide range industrial dc power supply (15 to 60 VDC).
  • Loop powered device (true-two wire).
  • No potentiometers – hassle free calibration.
  • Various customized process connections like Threaded/Flanged/Hygienic etc.
  • Water bed sensing for oil/fuel/fatty-acid applications.
  • Remote electronics version available on request.
  • Exd version available-suitable for Gas Group IIC, T6 as per IEC 60079-1-2007 & IEC 600529-2001.


trumenThe probe forms a capacitance with the metalic tank-wall.

The capacitance is sum of three capacitance:-

C(air)=ε(air) x P x (H-L)
C(material)=ε(material) x P x L
C(residual) is due to device itself.

Where ε(air) is the dielectric constant of air ≈1.
ε(material) is dielectric constant of material.
P is the constant of probe and installation, H is the active length of probe and L is the level of material.

Capacitance to level translation is performed with the aid of on-site calibration also called “wet-calibration”.

trumenThe device stores a low level capacitance as level for 4mA and high level capacitance as level for 20mA as defined by the user.




  • Free flowing homogeneous liquids Like oil, raw water, WFI, DM/DI water etc.
  • Suitable for top mounting.
  • Process temperature max. 200 ºC.
  • Process pressure max. 20 bar.
  • Suitable for corrosive liquids.


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