Siemens SITRANS LVL100 Operating Instructions Manual page 14

Mounting
Inflowing medium
Flows
14
If SITRANS LVL100 is mounted in the filling stream, unwanted
false measurement signals can be generated. For this reason,
mount SITRANS LVL100 at a position in the vessel where no
disturbances, e.g. from filling openings, agitators, etc., can
occur.
To minimise flow resistance caused by the tuning fork,
SITRANS LVL100 should be mounted in such a way that the
surfaces of the blades are parallel to the product movement.
SITRANS LVL100 l CONTACTLESS ELECTRONIC SWITCH