Level

MEASURING PRINCIPLE

Guided-wave radar level

Low-power radar pulses travel down a probe; the reflection at the liquid surface sets the level, and a second echo can show the interface.

PRINCIPLE · LIVE SIGNAL13.9mA

HOW IT WORKS

See the principle in action

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Guided-wave radar level

LEVEL
50 %

OUTPUT
12.0 mA

ADJUST LEVEL

A radar pulse runs down a probe.
Part of the pulse reflects where the dielectric changes, at the surface.
Time of flight gives level, even through foam, vapour and turbulence.

AT A GLANCE

Strengths and limits

STRENGTHS

Contact method for foam, vapour and interface

LIMITS

Probe fouling and buildup need consideration

INSTRUMENTS

Instruments using this principle

LV-220

Level

Guided-Wave Radar Level Transmitter

Level and interface measurement through foam and vapour.

ACCURACY

±2 mm

PROTECTION

IP67

APPLICATIONS

Where this principle is the answer

APPLICATION

Corrosive chemical tank level

Fumes, condensation and aggressive media attack contact sensors and defeat ultrasonic readings.

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Articles and downloads

Technical article

How radar level measurement works

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Application note

Choosing level technology for corrosive tanks

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FAQ

Common questions

RFQ

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