erosing The Royal Renaissance Man Premium Member May 29, 2010 #1 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.
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.