Conventional Photoelectric Smoke Detector Adopting photoelectric sensing principle, when fire break out and smoke enters the light-tight chamber of detector then the smoke particles cause the infrared light reflex. As receiving unit receive certain extent of emitting light, the fire alarm will be activated. The due-colored LEDs are built in the main body in order to easily identify the status of the detector. Green light blinks every 15 seconds to indicate the detector is working normally and red light lights up continuously to indicate fire alarm activated. other product; -Smoke & Heat Combined Detector -Multipurpose Heat Detector -Conventional Fixed Temperature Heat Detector -Conventional Rate of Rise Heat Detector -Conventional Photoelectric Smoke Detector -Addressable Photoelectric Smoke Detector -Addressable Rate of Rise Heat Detector -Addressable Fixed Temperature Heat Detector -Indicating Lamp -Fire Alarm Complex -Fire Alarm Bell -Addressable Repeater/Module -Manual Call Point