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Working Principle

Conductivity type level limit switches are static devices with no moving parts.

A low voltage sine-wave is supplied into the liquid using a reference rod (or electrode).

The electronics continuously scans the sense rod (or electrode) for the presence of sine-wave signal on it. As soon as liquid bridges the two electrodes, the signal begins to appear on sense-electrode

Device gives the switching output by analyzing the received signal at sense electrode.


  • Suitable for conductive liquids like water.
  • Top mounting & side mounting options.
  • Minimum and maximum fail safe field selectable.
  • Single point/multipoint/pump-control switching.
  • Process temperature max 200 ÂșC.
  • Process pressure max. 10 bar.
  • Exd version available-suitable for gas group IIC, T6 as per IEC 60079-1-2007 & IEC 600529-2001.


  • Compact size.
  • Integral version with universal power supply (15 to 60 VDC & 15 to 260 VAC).
  • Low power consumption.
  • No calibration required.
  • Various customized process connections like Threaded/Flanged.
  • Remote electronic version available on request.

Typical Mounting Positions

Product Video

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Contact Us

Trumen Technologies Pvt. Ltd.
86, Tilak Path, Rambagh Indore
PIN: 452 007 MP. India

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