F
ig
.
12
:
A
gitators
T
hrough the action of
fi
lling
,
stirring and other processes in the vessel
,
compact foams that damp the emitted signals considerably may form
on the product surface
.
I
f foams are causing measurement errors
,
the biggest possible radar
antennas
,
the electronics with increased sensitivity or low frequency
radar sensors
(
C
band
)
should be used
.
A
s an alternative
,
sensors with guided microwave can be used
.
T
hese
are una
ff
ected by foam generation and are best suited for such
applications
.
W
hen using a surge pipe in a vessel
,
in
fl
uences from vessel
installations and turbulences can be excluded
.
U
nder these prereq
-
uisites
,
the measurement of products with low dielectric values
(ε
r
value
≥
1
.
6
)
is possible
.
I
n very adhesive products
,
measurement in a
surge pipe is not recommended
.
F
oam generation
M
easurement in a surge
pipe
18
VEGAPULS
62
•
4
…
20
m
A
/
HART
two
-
wire
4
M
ounting
36503
-
EN
-
100607
