Panasonic passive infrared motion sensors panasonic amn12111 a highly compact pir sensor housed in a to5 package fitted with a zoned fresnel lens the sensor detects infra red radiation in the low infrared spectrum 10microm wavelength which is emitted by human movementthe sensors are able to detect a change in temperature from object to ambient from as little as 3degc changes in the level of detected emission are evaluated by a window comparator and if the change exceeds the upper or