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Level Measurement · Glossary

What is a Vibrating Fork Level Switch?

point levelLevel Measurement

A vibrating fork level switch detects liquid when the frequency of its vibrating tines drops as they are covered.

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Vibrating Fork Level Switch Explained

A piezo drive keeps the fork vibrating at its resonant frequency in air. Liquid around the tines lowers the frequency, and the electronics switch the output.

Forks have no moving parts to stick, are almost unaffected by foam, flow and bubbles, and self check their own vibration. They are popular for overfill and dry run protection.

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Calculators for Vibrating Fork Level Switch

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Free downloadLevel Switch Testing ProcedureFree step by step procedure, Word and PDF.

Frequently Asked Questions

What is a Vibrating Fork Level Switch?

A vibrating fork level switch detects liquid when the frequency of its vibrating tines drops as they are covered.

Can a fork detect solids?

Yes, special forks with longer tines detect powders and granules.

Why mount forks horizontally?

So liquid drains from between the tines and build up is reduced; follow the maker orientation guide.

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All level measurement terms · Full glossary A to Z

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