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Serviceline Industrial Sensors
Sales phone: 0161 622 6308
Tech phone: 0161 622 6311
Fax: 0161 624 6537
Serviceline Explosion Protection
Sales phone: 0161 622 6309
Tech phone: 0161 622 6313
Fax: 0161 624 6537

Measuring principle

The piezoelectrically activated vibration of a vibrating fork is damped when the fork comes into contact with the medium. Using this change, an electronic system determines the switching signal. The function is independent of fluctuations in the physical properties of the medium.

Operation mode

The two paddles of a vibrating fork are actuated using a piezoelectric source. In air the vibrating fork vibrates at its resonance frequency. When it is immersed in rising liquid, the frequency and amplitude of the vibration is reduced. The change is evaluated electronically and produces the switching signal.