User's Manual

Fig. 13: Agitators
Through the action of filling, stirring and other processes in the
vessel, dense foams which considerably damp the emitted
signals may form on the product surface.
If foams lead to measurement errors, you should use the
biggest possible radar antennas and low frequency radar
sensors, e.g. VEGAPULS 65, 66 (C-band).
VEGAFLEX sensors with guided microwaves are not influ-
enced by foam generation and are particularly suitable for such
applications.
By the use of a standpipe, influences of vessel installations
and turbulence can be excluded. Under these requirements,
the measurement of products with low dielectric values (from
DK value 1.6) is possible.
Surge or bypass tubes must extend all the way down to the
requested min. level, as measurement is only possible within
the tube.
Foam generation
Measurement in the stand-
pipe (surge or bypass tube)
22 VEGAPULS 62 - 4 ... 20 mA/HART
Mounting
28435-EN-060317