The job of the motion detector is to turn the light on and off dependent on ambient brightness. Particularly in thoroughfares such as stairs or hallways where a person enters the detection range or leaves the room again, automatic lighting control is provided. The main focus here is the prevention of dangerous situations in the dark. In this application, it is not allowed to switch off the light manually. The desired run-on time always expires here and the light switches off if the run-on time is not restarted by movement again. During the locking time, the motion detection is suppressed and thus ensures that the lighting is not immediately switched on again due to cooling lamps.

Presence detectors are motion detectors that are typically placed in rooms where a person is present for longer. The presence detector primarily has the objective to save energy and to switch off or dim the room lighting when no person is present. The presence detector must also be able to recognise small and sporadic movements for this. In this application, the light must also be able to be switched off manually. Presence detectors can be switched off as required and then ignore movements in the detection range.