Level Measurement · Glossary

What is False Echo Suppression?

echo mappingLevel Measurement

False echo suppression teaches a radar or ultrasonic transmitter to ignore echoes from fixed obstructions inside the tank.

False Echo Suppression Explained

Ladders, agitators, nozzles and welds reflect signal. The transmitter records an echo map of the empty or partly empty tank and suppresses these echoes so it tracks the real surface.

Do the mapping with the level low, and only up to just above the surface, otherwise the real level echo may be suppressed.

Calculators for False Echo Suppression

CalculatorRadar Level CalculatorFree online calculator with formula and worked example.CalculatorUltrasonic Level CalculatorFree online calculator with formula and worked example.

Free Downloads

Free downloadRadar Level Transmitter Commissioning ProcedureFree step by step procedure, Word and PDF.

Frequently Asked Questions

What is False Echo Suppression?

False echo suppression teaches a radar or ultrasonic transmitter to ignore echoes from fixed obstructions inside the tank.

When should the echo map be redone?

After changes inside the tank, after relocating the sensor, or when a fixed false echo is tracked.

Can mapping hide the real level?

Yes, if mapped below the actual surface. Always check the map range.

Learn more on the blog

Guided wave radar vs non contact radar

A practical guide on instrumentationblog.in with more detail on false echo suppression and how it is applied on real plants.

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More Level Measurement Terms

Level termDisplacer Level TransmitterA displacer level transmitter measures level from the buoyancy force on a heavy cylinder partly submerged…Level termFloat Level SwitchA float level switch uses a buoyant float that rises and falls with the liquid to operate a contact at…Level termVibrating Fork Level SwitchA vibrating fork level switch detects liquid when the frequency of its vibrating tines drops as they are…Level termMagnetic Level GaugeA magnetic level gauge shows level with coloured flaps turned by a magnetic float inside a chamber beside…Level termCapacitance Level ProbeA capacitance level probe measures level from the change in capacitance as liquid replaces air between…Level termLoad Cell Tank WeighingLoad cell tank weighing measures the mass of a vessel contents from load cells under its supports.

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