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Conductive Fluid Level Detection

Conductive sensing for detecting when a preset fluid level has been reached.

Conductive fluid level switches are threshold contact trip devices which typically consist of one or two metal rods extending out from the switch probe housing.

One of the metal rods has a custom length to reach the required fluid height.

The other metal rod extends down to a lower position, or alternatively the outer wall of a metal tank is used to complete the circuit.

When the fluid touches the custom length metal rod, the circuit is closed between the two electrodes.

Both electrodes are wired to an electrode controller module which maybe fitted within the probe housing or connected remotely. The controller will monitor the two electrodes and when the resistance changes, due to the fluid touching both electrodes, it will activate the switch contacts.

Additional fluid level switching thresholds can be achieved by incorporating more metals rods into the switch assembly, each one providing an additional level switching channel.

Featured liquid level measurement products

  • LevCal Submersible Hydrostatic Liquid Level Sensor Calibration Kit LevCal Submersible Hydrostatic Liquid Level Sensor Calibration Kit
  • IMCL Submersible Absolute Reference Depth Sensor
  • DS200 Combined Hydrostatic Level Switch, Gauge and Sensor
  • 0-10 Volts Output Hydrostatic Sensors, Probes & Transducers

Glossary of Liquid Level technical terms

  • Capacitive Fluid Level Measurement
  • cmH2O – Centimetres of Water Column at 4 deg C Pressure Unit
  • Float Fluid Level Detection
  • ftH2O – Feet of Water Column at 4 deg C Pressure Unit
  • Hydrostatic Pressure
  • mH2O – Metres of Water Gauge at 4 deg C Pressure Unit
  • mmH2O – Millimetres of Water Column at 4 deg C Pressure Unit
  • Specific Gravity
  • Vibrating Tuning Fork Fluid Level Detection

Help from Liquid Level resources

  • Measuring liquid level in a sealed tank with a hydrostatic pressure sensor
  • Measuring the volume of liquid in a horizontal cylinder tank
  • Determining water tank volume using hydrostatic pressure
  • How do you measure the volume of a liquid using pressure
  • Calculating required pressure range for fuel tank level measurement
  • Measuring liquid level in a tank using a dp sensor

Guidance with Liquid Level requirements

  • Hydrostatic Pressure
  • Hydrostatic Liquid Level Sensors
  • Liquid Level Sensors

Tools for Liquid Level calculations

  • Fluid Depth, Density, Gravity, and Pressure Calculator

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