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Microsystems - Process Control Instruments & Automation Systems - ABB Partner
Tuning Fork Switch

A tuning fork switch comprises a two prong fork which is driven to oscillation at its natural frequency, usually by a piezo-crystal assembly. The switch is usually mounted on the side or top of a tank using a flange or threaded process connection such that the forks protrude into the tank.

The vibrating fork type level switch working principle is simple and effective.  This makes vibrating fork type level switches (a.k.a. tuning fork type level switches) reliable, cost effective and very popular for use in detecting the presence or absence of liquids and bulk solid materials.  The vibrating fork type level switch working principle is based upon detecting the change in harmonic vibration frequency of the sensing element as a result of the presence of the target media.




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