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Article | REF: R2011 V2

Level Measurement and verification – systems for liquids and solids

Author: Florestan OGHEARD

Publication date: June 10, 2020, Review date: April 26, 2021

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8. Vibrating fork sensors

8.1 Symmetrical blade system

Two blades, arranged like a tuning fork, are raised to their resonant frequency (of the order of a hundred hertz) by the piezoelectric effect. When immersed in a liquid or bulk solid, the resulting damping causes a relay to switch (figure 31 ).

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