How do motion detectors work?
Our PIR (Passive Infrared) motion detectors frequently take a snapshot of the heated surfaces in the room. The multiple tiny windows give the detector a peculiar view, similar to a fly or spider. If a heat source moves from one window to another, the motion recognizes the movement and will sound the alarm. If the motion is rated for animal movement, it will ignore the heat sources under a certain height up to a certain number of windows wide. It senses animals 40–80 pounds in weight.
