Operating Instructions
19
Installation in underfloor boxes
The sensors are often installed in protective boxes for taking level measurements in concrete silos.
These may, for example, take the form of metallic sealed underfloor boxes.
For this application the minimum scattered radiation of the sensor may be reflected and amplified by the walls
of the underfloor box. On sensors with plastic housings this may result in interference. The use of a sensor
with an aluminium or stainless steel housing prevents this.
1
2
Fig. 25: Device installation in an underfloor box
1 Underfloor box
2 Concrete floor
Installation in a multi-chamber vessel
The silo walls in multi-chamber silos are often profile walls made of trapezoidal sheet metal, for example, to
provide the required strength. If the radar sensor is installed very close to a heavily textured vessel wall, it
may suffer serious interference reflections. The sensor should therefore be installed at as great a distance as
possible from the partition wall. It should ideally be installed on the external wall of the silo with the sensor
aligned towards the discharge in the centre of the silo.
Fig. 26: Installation in multi-chamber silos
Fig. 27: Alignment to the discharge in the centre of the silo
