Radar (Non Contact) Level Transmitter working and Parameters


Working Principle

A radar signal is emitted via a horn antenna, reflected on the measuring surface and received with a time delay (Doppler’s effect).The frequency difference is transformed via an electronic circuit into the difference of the frequency spectrum and then the distance is calculated.


Important Parameters and settings of a CONE type Radar LT (Rosemount 5600)

Consider a tank as shown below

Untitled - Copy

LRV = 0 mm

URV = 10600 mm

Tank height = 11310 mm

Distance Offset = 0 mm (normally assumed zero)

Minimum Level offset = 0 mm (normally assumed zero)

Calibration distance = 0 mm (normally assumed zero)

Upper Null Zone = 500 mm

Antenna Cone 6” PTFE

Tank type Vertical cylinder

Tank bottom type Flat

Tank environment

  1. 1.Process condition Rapid change OFF

    2.Product DC between 2.5 and 4 (here crude oil)

    3.Basic volume Calculation method not changed

Tank Presentation

Negative level as 0

No alarm if empty ON

No alarm if full   ON

Slow search OFF

Bottom echo visible ON

General Threshold

3340 mV


No. Of sensors 0

Type RTD PT 100


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Basic Instrumentation and Calibration

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