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.
Liquid level measurement products
- 1.6 mH2O submersible transmitter for wash water break tanks
- CIP protected dairy sensor for measuring level of milk in 6m high tank
- 0-10 Volts Output Hydrostatic Sensors, Probes & Transducers
- Hazardous Area Submersible Hydrostatic Liquid Level Sensors
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
- 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