ISG Fluid Level Sensor

The Fluid Level Sensor detects and reports the presence or absence of fluid by immersion without moving parts.

Working Principle

  • Uses the non-linear properties of doped silicon to detect a liquid or excessive heat in conjunction with a current limiter and heat sink.
  • As the temperature of the sensor changes, so does the voltage across it - thermally variable resistor.
  • The change is modest within the operating window, but extreme once removed from fluid.
  • Uses "self heating property"
  • Select trigger V between in fluid and air.

fluid level principle


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