Wall mounted occupancy sensors that replace conventional light switches are available at low cost.

Some occupancy sensors utilize both passive infrared and ultrasonic technology, but are usually more expensive.

Other lighting applications include occupancy sensors, light sensors and key card switches.

The best applications for passive infrared occupancy sensors are open spaces with a clear view of the area being scanned.

The table below shows potential electricity savings from using occupancy sensors to control lighting in various types of spaces.

Some occupancy sensors use both passive infrared and ultrasonic technology.

Proper placement and orientation of occupancy sensors is crucial.

Some buildings rely on occupancy sensors to activate lighting and/or climate conditioning.

If occupancy sensors are present, they can also be used as burglar alarms.

These occupancy sensors automatically turn off the lights after 30 minutes if there is no motion in a room.