Alarm can output independent relay smoke sense

Independent photoelectric smoke detector and alarm (hereinafter referred to as alarm) adopts infrared photoelectric sensor with special structure design, MCU with reliable performance and SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT It is suitable for smoke detection and alarm in workshop, household, shop, machine room, warehouse and other places.


Ii. Working principle




The alarm adopts photoelectric sensor designed with special structure and MCU with reliable performance, which can effectively detect the smoke generated in the initial smoldering stage or after the generation of fire. When smoke into the alarm system, make the light scattering, accept element feel light intensity, the received light intensity and smoke concentration have certain linear relationship, the alarm parameters on site constantly gathering, analysis, and judgment, when confirm the intensity of light field data reaches the threshold, the alarm of the red LED lights up, and start the buzzer alarm. When the smoke in the working environment disappears, the alarm will automatically return to the normal working state.

Technical features


Sound pressure level: 80dB(A)/ 3 meters in front


Power supply: DC3V(one CR123A battery)


Battery life: 3 years


Static current: 8uA


Alarm current: 70mA


Working temperature: - 10 ℃ ~ + 50 ℃


Relative humidity: 95% RH or less (40 ℃ plus or minus 2 ℃)


Output form: relay switching quantity signal


Executive standard: gb20517-2006


Weight: about 160g (including battery)

Normal status: the red indicator lights up every 50 seconds or so, and automatically detects the concentration of smoke in the surrounding environment every 8S or so.


Fault status: when the battery of the alarm is lower than 2.6v, it will ring once and the red indicator will flash twice, indicating the battery is under voltage. When the alarm reminds under-voltage, the battery should be replaced in time, otherwise it will affect the normal work of the alarm.


Alarm status: when the smoke concentration reaches the alarm value, the red indicator light will start flashing. At this time, the alarm will judge whether the fire alarm is real or not. When the alarm is confirmed to be correct, the red indicator light will quickly flash and the alarm sound will be sounded.


Self-test status: the alarm should be self-tested regularly. When the button is pressed, the red indicator light will flash and sound the alarm. After releasing the button, the alarm will automatically return to the normal working state.


Mute state: press the button once under the alarm state, and the alarm will enter the mute state. In the silencing state, the alarm sound stops and the red indicator lights quickly flash. After the silencing state is maintained for about 85 seconds, the alarm will automatically exit the silencing state. If there is still smoke at this time, the alarm will start the alarm again.


Exit the mute state, if the smoke has disappeared, the alarm will automatically enter the normal monitoring working state.




This product is not suitable for use in the following places:


Places with smoke retention under normal circumstances.


Places with large dust, water mist, steam, oil mist pollution and corrosive gas.


Where relative humidity is greater than 95%.


Places with ventilation speed greater than 5m/ s.