KROHNE OPTISOUND 3020C 4wire EN - Manual (Page 16)

Fig. 12: Agitators
Do not mount the instruments in or above the filling stream.
Make sure that you detect the product surface and not the
inflowing product.
Fig. 13: Inflowing liquid
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 are causing measurement errors, the sensor should
be used in a standpipe or, alternatively, the more suitable
guided radar sensors (TDR) should be used.
Inflowing material
Foam
16 OPTISOUND 3020 C - 4 ... 20 mA/HART - four-wire
Mounting
30508
-EN
-050914