More About Motion Detectors Sensors
Motion detectors can cover a wide area for the detection of movement. If you would rather not arm all of your windows with switches, you can cover a group of windows with one or two motion detectors. Motion detectors are best used as a backup to other devices such as door contacts. Motion sensors work by reading the heat signatures of a room and detecting large moving signatures of people entering the area. Motion detectors can be wall-mounted, corner-mounted, or, in some cases, ceiling-mounted. They are not recommended for use in hallways or to be pointed at stairwells as these installation instances can cause problems such as false alarms.