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
Submersible Hydrostatic Level Sensors & Probes - Explore submersible hydrostatic level sensors for continuous liquid level measurement. IP68 rated probes for tanks, boreholes, rivers & chemical compatibility.
Portable battery powered tank level gauge with submersible sensor - Is there anything portable that could be dropped into different sized and irregularly shaped tanks to measure the amount of change in liquid height?
Related 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
- Liquid Level Sensors
- 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
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