Linear Smoke Detectors : The linear smoke detector is the ideal detector for monitoring large store-rooms and production workshops or atrium type buildings. It
consist of the actual detector and a reflector placed opposite the detector. The detector contains a light transmitter and a light receiver. The transmitter supplies a bunched infrared beam, which
is returned to the transmitter by the prism-shaped reflector. If smoke is penetrating in the light beam, the receiver can convert the decrease of the beam to an alarm signal.