Emerson Rosemount 5402 Reference Manual page 28

Introduction
October 2018
Process medium characteristics
Materials with very low dielectric
Changing density/dielectric/pH/
pressure/temperature
Coating/viscous/crystallizing liquids
Solids, granules, powders
1. The obstruction should not be within the radar beam. Preferred choices due to more narrow radar beam: Rosemount 5402, and cone antenna.
2. If tall nozzle, use extended antenna.
3. The active part must protrude beneath the nozzle.
4. An extended cone antenna must be used.
5. Air purging might be needed.
6. Build-up can often be avoided or reduced by using heat-tracing or cleaning arrangements.
7. Use a 6 or 8 in. (150-200 mm) cone antenna.
8. Foam can either reflect, be invisible, or absorb the radar signal. Pipe mounting is advantageous since it reduces the foaming tendency.
9. Other wetted material options include Alloy C-276 and Alloy 400. See the Rosemount 5400 Series
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Product Data Sheet for details.
Reference Manual
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Introduction