Siemens SITRANS LG270 Operating Instructions Manual page 15

Mounting socket
PBD-51041064
When mounting rod or cable probes in vessels without metal walls,
e.g. in plastic vessels, the measured value can be influenced by
strong electromagnetic fields (emitted interference according to
EN 61326: class A). In this case, use a probe with coaxial version.
Fig. 5: Mounting in non-metallic vessel
1 Flange
2 Metal sheet
If possible, avoid sockets. Mount the sensor flush with the vessel top.
If this is not possible, use short sockets with small diameter.
Higher sockets or sockets with a bigger diameter can generally be
used. They can, however, increase the upper blocking distance (dead
band). Check if this is relevant for your measurement.
In such cases, always carry out a false signal suppression after
mounting. You can find further information under "Setup procedure".
Fig. 6: Mounting socket
When welding the socket, make sure that the socket is flush with the
vessel top.
SITRANS LG270 - Operating Instructions
1
d
DN40 ... DN150
> DN150 ... DN200
d
2
h
≤ 150 mm ( 5.91")
≤ 100 mm (3 .94")
15