01

MEASURING PRINCIPLE

80 GHz FMCW radar level

A frequency-modulated radar beam reflects off the surface; the frequency offset between emitted and returned signal gives distance.

PRINCIPLE · LIVE SIGNAL13.9mA
80 GHz FMCW radar level: how it works | INSTRAVAPRIN01

02

HOW IT WORKS

See the principle in action

Move the slider to change the process variable and watch the signal respond.

80 GHz FMCW radar level
80 GHz FMCW radar level: how it works | INSTRAVA4300 mm
LEVEL
50 %
OUTPUT
12.0 mA
  1. A radar chirp is transmitted downward.
  2. The echo returns from the product surface.
  3. The frequency offset between sent and returned signal is proportional to distance, and so to level.

03

AT A GLANCE

Strengths and limits

STRENGTHS

Non-contact, tight beam, unaffected by vapour or temperature

LIMITS

Foam and heavy condensate can attenuate the echo

07

FAQ

Common questions

RFQ

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