VEGA VEGAPULS 61 (≥ 2.0.0 - ≥ 4.0.0) Foundation Fieldbus Approval according to LPR radio standard - Manual (Page 21)

As an alternative, sensors with guided microwave can be used. These
are unaffected by foam generation and are best suited for such
applications.
When using a surge pipe in a vessel, influences from vessel
installations and turbulences can be excluded. Under these prereq-
uisites, the measurement of products with low dielectric values (ε
r
value ≥ 1.6) is possible. In very adhesive products, measurement in a
surge pipe is not recommended.
1
2
3
100%
4
5
8
6
7
0%
9
Fig. 16: Configuration surge pipe
1 Radar sensor
2 Marking of the polarisation direction
3 Thread or flange on the instrument
4 Vent hole
5 Holes
6 Weld joint
7 Welding neck flange
8 Ball valve with complete opening
9 Fastening of the surge pipe
Instructions for orientation:
l Note marking of the polarisation plane on the sensor
Measurement in a surge
pipe
VEGAPULS 61 • Approval according to LPR radio standard 21
4 Mounting
41716
-EN
-120301