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Vibrating Tuning Fork Fluid Level Detection

Vibrating Tuning Fork Fluid Level DetectionVibrating 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.

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