Long range smoke detector beam system  
 Beam system Fire Detector is a Long-interval reflection line infrared beam system , which must be used together with a reflector.

In case of smoke on the light path of the detector, the signal arriving at the receiver is reduced;

--when the light reduction rate reaches the preset threshold, the detector will produce the alarm signal;

-when the light beam is completely blocked, the detector will produce the fault signal to prevent the false alarm caused by non-fire blockage.

Deatail show picture of beam system  

Parameters of beam alarm