Especially suitable for high-rise buildings without shelter space, such as shopping malls, halls and halls, ancient buildings, large workshops, warehouses, tunnels, interlayers and stuffy roofs of various buildings, etc. This product can be used in all places where smoke appears before the fire. When smoke enters the detection area, the intensity of the received infrared light decreases due to the occlusion of the beam. When the smoke reaches a certain concentration so that the intensity of infrared light is lower than the set threshold, the detector alarms, starts the buzzer and lights the red indicator.
