The sensor must always be immersed in liquid. The alarm is activated when the sludge
layer reaches the alarm switching point (S), which is located inside the sensor gap (T).
The sensor activates the alarm when it is in contact with air. For this reason, the separator
must always be filled with water after draining.
Figure 8. Installing the idOil-SLU sludge
sensor
1 idOil-SLU sludge sensor
A Air
B Oil
C Water
D Sludge
L Standard liquid level
S Alarm switching point
X Maximum allowed sludge layer height
T Sensor gap
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