The wireless PIR Motion Sensor is an INPUT DEVICE, the motion sensor works on the principle of sensing
infrared energy (heat) emitting from an intruder"s body moving through a protected area. The MOTION SENSOR is commonly referred to as a PIR, which stands for passive Infrared. The sensor usually covers a 40" x 40" open area at a 90 degree angle. The sensor is more sensitive to movement perpendicular to it rather than to and from it. The unit should be installed in a location where there will be a "cross catch" across its pattern. The Motion Sensor will not detect intruders through walls, glass, furniture or any other solid objects. If the customer has pets, a special PET ALLEY LENS or PET IMMUNE MOTION SENSOR is utilized. The Pet Alley Lens mounts at about light switch height and creates a blind spot to allow pets to wander around underneath whereas a Pet Immune Motion Sensor knows the difference between an intruder and a pet. If the premise has more than one Pet, ensure that the Pet Immune Sensor installed is capable of handling more than one pet.
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