Pepperl+Fuchs NVD-111 Manual page 20

Warning Device NVD-111
Installation
3.1.3
EN
18 - EN
Mounting the FAU-104 Fat Level Sensor
The sensor must be immersed a few centimeters when the liquid is at its normal
level (water zero line).
The exact immersion depth depends on
the type of grease interceptor,
n
its design
n
and the height of the maximum fat layer thickness.
n
The sensor must always be immersed in the liquid. The switching point of the
sensor is located at the same level as the reflectors (see chapter 2.3).
Caution!
Damage to the cable as a result of aggressive greases
The sensor cable must not be in continuous contact with grease or with water that
contains grease. The sensor is therefore fitted with shrink tubing. The shrink
tubing protects the cable from the effect of the grease to a fat layer thickness of
30 cm.
If fat layer thicknesses of more than 30 cm occur in your application, protect the
cable with additional shrink tubing.