Vibrating tuning fork switches for opening or closing electrical contacts at a preset fluid level.
Vibrating tuning fork fluid level switches are threshold contact trip devices which typically consist of a tuning fork which extends out from the switch housing.
In operation a piezoelectric oscillator is used to vibrate the tuning fork at its natural frequency for air.
A second piezoelectric device is used to pick-up the frequency of the vibrating tuning fork. When the fluid level rises and covers the tuning fork it will vibrate at a lower frequency.
This change in vibration frequency is used to detect when the required fluid level has been reached.
Featured liquid level measurement products
Hydrostatic Liquid Level Switches - Select hydrostatic level switches for precise threshold detection in tanks. Understand density effects, sealed tank solutions, and flush diaphragm benefits.
LevCal Submersible Hydrostatic Liquid Level Sensor Calibration Kit - Pressure calibration kit for calibrating a submersible hydrostatic liquid level sensor out of the water using a battery powered automatic pressure controller calibrator to generate and accurate source of air pressure, and the necessary test hose and adapters to attach to the different types and styles of submersible pressure sensor probe ends.
Glossary of Liquid Level technical terms
- Capacitive Fluid Level Measurement
- cmH2O – Centimetres of Water Column at 4 deg C Pressure Unit
- Conductive Fluid Level Detection
- 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
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
