A motion detector that activates when it detects that people are in the area and deactivates when there are not. Most commonly used to turn on/off lights only as needed, thus saving energy. Show contributors This page has been seen 1,063 times. Created by Arez on Aug 12, 2013 Contributors: erosing
A motion detector that activates when it detects that people are in the area and deactivates when there are not. Most commonly used to turn on/off lights only as needed, thus saving energy.