Panasonic napion series pir motion sensors high sensitivity human detection panasonic amn31112j a high sensitivity passive infrared pir motion sensor designed for the detection of the small movements of people animals etc the small size of the detector means it can be mounted in inaccessible places and the miniaturised lens with its 64 small elements give excellent sensitivity the circuitry of the sensor is enclosed in a metal to 5 can giving excellent resistance to radiation and power