KROHNE OPTISOUND 3040 C 4wire EN - Manual (Page 20)

Fig. 13: Transducers on traverse crane
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. 14: Inflowing material
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.
Guided radar is not influenced by foam generation and is
particularly suitable for such applications.
Inflowing material
Foam
20 OPTISOUND 3040 C - 4 ... 20 mA/HART - four-wire
Mounting
30515
-EN
-050914