Motion Sensor Light Switches

Motion sensors are also outmoded indoors and are generally called occupant sensors. A special feature of many occupant sensors is that they detect not only the presence of a person in a particular region but also detect the absence of a person as well. The arrangement they work is fairly simple and straightforward. The motion detector itself is designed to sense both the presence and the absence of a person, send the appropriate message or signal to what is called the control unit which then processes the information and sends a signal to a controllable switch which then either opens or closes a relay which either turns lights on or turns them off.

Besides providing security, the occupant sensor is a very effective energy savings way because of its capability to turn off lights when a room or station is not being former.

There are basically two different systems available for occupant sensors.
Motion Sensor Light Switches
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