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7.1.5 Highly adhesive medium
If the medium is highly adhesive, there is the risk that a bridge forms between the
probe and the tank wall or structures in the tank�
► Increase minimum distances depending on the adhesion intensity�
7.1.6 Heavy foam build-up and turbulence
Heavy foam build-up and turbulence may lead to incorrect measurements�
To avoid this
► install the sensor in a steady area by meeting the hygienic requirements�
For applications in hygienic areas: (→ 7.4.3) (→ 7.4.4)�
Examples how to create a steady area
(e�g� for secondary processes):
• Installation in metal bypass or metal still pipe (fig� 7-5)�
• Separation of the installation location by metal sheets / perforated
sheets (without figure)�
Fig. 7-5
d
d
A
B
C
D
d: minimum diameter (→ 7.1.2)
The upper access to the steady area (A, B) must be above the max� level�
The lower access (C, D) or the area with perforated sheet must be below
the min� level� This ensures that neither foam nor turbulence impact the
sensor zone� When perforated sheets or similar are used, soiling
(e�g� solids in the medium) can also be avoided�
With increased foam build-up the setting [MEdI] = [MId] (→ 11.6.2) is
recommended�
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