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
Storm surge protected low range submersible river level transmitter - This submersible level transmitter offers accurate low range water level monitoring with high overpressure resistance for storm surge protection in rivers
IMCL Low Cost Submersible Pressure Sensor - Economical IP68 protected sensor with stainless steel 316L housing and Ceramic strain gauge sensing diaphragm for measuring liquid depth pressure.
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
- 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
- Determining the hydrostatic pressure range for a tank level sensor
- Measuring liquid level in a sealed tank with a hydrostatic pressure sensor
- Difference between vented and non-vented water level measurement
- How do you measure the volume of a liquid using pressure
- Measuring liquid level in a tank using a dp sensor
