Measurement Setup - Pipes - bürkert 8138 Bedienerführung

Foam generation
Measurement in a surge
pipe
LEVEL TRANSMITTER 8138 • 4 ... 20 mA/HART - two-wire
Fig. 10: Agitators
Through the action of filling, stirring and other processes in the vessel,
compact foams that considerably damp the emitted signals may form
on the product surface.
If foams are causing measurement errors, the biggest possible radar
antennas, the electronics with increased sensitivity or low frequency
radar sensors (C band) should be used.
As an alternative, sensors with guided microwave can be used. These
are unaffected by foam generation and are best suited for such ap-
plications.
4.3

Measurement setup - Pipes

By using a surge pipe in the vessel, the influence of vessel installa-
tions and turbulence can be excluded. Under these prerequisites, the
measurement of products with low dielectric values (ε
possible.
Note the following illustrations and instructions for measurement in a
surge pipe.
Information:
Measurement in a surge pipe is not recommended for extremely
adhesive products.
4 Mounting
value ≤ 1.6) is
r
15