WHAT IS THE MOTION DETECTOR (PIR)?
The motion detector is used to detect movement inside the house. This device sends a series of fan shaped, infra-red beams approximately 35-40 feet at a ninety degree angle. It is normally placed in a hallway or central pathway in the home leading to the master bedroom area, since this is the first place most intruders go. Your home may require more than one motion detector to give maximum protection.