motion detectors
securityman sm 80 wireless wide angle pir motion sensor for air alarm system
disti content the add on wireless wide angle pir passive infra red motion sensor for air alarm system by securityman detects an infrared emitting source with one temperature such as a human body that passes in front of a source with another temperature such as a wall . it does not detect non temerature objects or real motion it detects that something has broken the field which the sensor has determined as the normal state . the pir sensor is set to detect rapid temperature change which means that it works in the cases of intrusion human and fire . end disti content
security man