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Level Measurement · Glossary

What is a Stilling Well?

calming pipe inside a tankLevel Measurement

A stilling well is a vertical perforated pipe inside a tank that calms the liquid surface for level measurement.

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Stilling Well Explained

Turbulence, foam and agitation make a rough surface. Inside a stilling well the liquid is calm, giving a stable echo for radar or a steady position for floats and displacers.

The pipe must have holes or slots so the inside level follows the tank. For radar, use a smooth pipe of the right size with an antenna made for pipes.

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Calculators for Stilling Well

CalculatorRadar Level CalculatorFree online calculator with formula and worked example.CalculatorTank Ullage CalculatorFree online calculator with formula and worked example.

Frequently Asked Questions

What is a Stilling Well?

A stilling well is a vertical perforated pipe inside a tank that calms the liquid surface for level measurement.

Why do stilling wells need holes?

So the level inside matches the tank level; without them it lags or differs.

Can viscous liquid block a stilling well?

Yes, deposits can block slots and inside build up causes false echoes.

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Related Terms

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More Level Measurement Terms

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All level measurement terms · Full glossary A to Z

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