Pepperl+Fuchs NVD-111 Manual page 16

Warning Device NVD-111
Installation
EN
14 - EN
1
A
B
C
Figure 3.2 Mounting the overflow sensor
1 Overflow sensor KVF-O
A Air
B Fat, oil, grease (FOG)
C Water
L Water zero line
S Sensor switching point
X Alarm limit (maximum liquid level)
If a non-electrically conductive fat layer settles on the surface, there is a risk that a
possible overflow will not be detected by the sensor. Therefore we recommend
mounting a pitot tube for overflow sensor KVF-O. This ensures that the sensor
only comes into contact with water and the overflow is detected. The following
diagram shows the composition.
S
L