Siemens SITRANS L Series Operating Instructions Manual page 20

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Figure 4.3
Inflowing medium
Do not mount the transmitters in or above the filling stream. Make sure that you de-
tect the product surface, not the inflowing product.
Figure 4.4
Mounting nozzle
For nozzle mounting, the nozzle should be as short as possible and its end rounded.
This reduces false reflections from the nozzle.
With threaded nozzle, the antenna end should protrude at least 5 mm (0.2 in) out of
the nozzle.
Figure 4.5
If the reflective properties of the medium are good, you can mount SITRANS LR110
on nozzles longer than the antenna. The nozzle end should be smooth and burr-free,
if possible also rounded.
Note
When mounting on longer nozzles, we recommend carrying out a auto false each
suppression (see chapter "Parameter adjustment").
You will find recommended values for nozzle heights in the following illustration or
the table. The values come from typical applications. Deviating from the proposed di-
mensions, also longer nozzles are possible, however the local conditions must be tak-
en into account.
SITRANS LR110
Operating Instructions, 01/2020, A5E49829006
Reference point
Reference point
Mounting of the radar transmitter with inflowing medium
Recommended threaded nozzle mounting of SITRANS LR110
Installing/mounting
4.3 Mounting instructions
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