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Working Principle

Capacitance type limit switch is a static level sensor,Its sensing parts are:-

Earth Extension (body)

Sensing Rod

The capacitance is formed by the sense rod and earth extension.

When no material is present, the capacitance is analogically a multiple of probe dimension and dielectric constant of air {ε(air)≈1}.

When the material is present, the capacitance gets multiplied by dielectric constant of the material.

This variation in capacitance is then translated into switching output by the device.


  • Suitable for non-sticky liquids and solids.
  • Suitable for side as well as top mounting.
  • Single point/multipoint/pump control switching on single probe.
  • Minimum and maximum fail safe field selectable.
  • Process temperature max 600 ºC (ceramic insulation).
  • Process pressure max. 15 bar.
  • PTFE coated for corrosive and conductive liquids.


  • Compact size.
  • Universal industrial power supply (15 to 80 VDC & 15 to 260 VAC).
  • Low power consumption.
  • Easy dip switch calibration.
  • Customized process connections like Threaded/Flanged/Hygienic etc.
  • Remote electronics version available on request.
  • Exd version available-suitable for gas group IIC, T6 as per IEC 60079-1-2007 & IEC 600529-2001.

Typical Mounting Positions

Product Video

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+91-731-656 2425, +91-731-243 5106,