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    Photoelectric Smoke Detector, Dual Sensor, Smoke Alarm

    5 out of 5 based on 1 reviews | Write a review
    Photoelectric smoke detector hardwired with blue light and red light dual light source smoke temperature detection can test smaller smoke particles. Quiescent current less than or equal to 1mA (uA) and working voltage DC 9V~32V. Detection angle 360° with detection distance reach to 40-60m. The optical smoke alarm equipped with two high-sensitivity thermistor sensors to upload the temperature to the controller in real time, work at the temperature -40°C~ 85°C. Widely used in families and community factories, companies, schools, warehouses, petroleum, chemical and many other places.
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    Photoelectric smoke alarm equipped with high-sensitivity thermistor sensor to upload the temperature to the controller in real time. Work at -40°C~ 85°C and detection angle 360°, detection distance reach to 40-60m. The detector needs to communicate with the host computer through the RS485 bus.


    Model ATO-GM-RS411
    Power supply DC 18V~32V
    Electric current Quiescent current ≤ 4mA
    Alarm current ≤ 6mA
    Smoke Sensitivity 0.1% ~ 5% OBS (adjustable)
    Relative humidity ≤95% RH (40°C ±2°C) (no condensation)
    Detect light source 470nm/ blue light + 940nm infrared light
    Operating temperature -40℃~85°C
    Shell material Fireproof ABS
    Alarm temperature 57°C~ 62°C
    Dimensions 55mm x 102mm
    Communication method MODBUS RTU
    Detection angle 360 degrees
    Detection distance 40-60 (m2)
    Quiescent Current ≤1mA (uA)
    Operating Voltage DC 9V~32V
    Alarm current ≤5mA (mA)
    Operating temperature -10℃~50℃
    Scope of application All fire hazards
    Installation method Ceiling type
    Communication method 485 communication mode


     Photoelectric smoke detector dimension

    Terminal connection method

    Terminal number Terminal identification Terminal function Wiring Instructions
    1 IN - Negative pole of power supply ( DC 24V- ) It is recommended to use a wire core greater than 0.75 square mm wire
    2 IN + Positive pole of power supply ( DC 24V+ )
    3 A RS485 bus A It is recommended to use a wire core greater than 1.0 square mm twisted-pair wires (parallel wires not recommended)
    4 B RS485 bus B
    5 E Connect the cable shield Connecting the cable shield


    1. Photoelectric smoke alarm accurate measurement with protection circuit, made of environmentally friendly material. Thermal response probe, efficient and accurate. Worry-free after-sales, national guarantee.
    2. Best smoke detector layered structure, stable and reliable with ABS corrosion resistance, not easy to deform. It adopts a unique inverted spiral smoke inlet structure, blue light and red light dual light source smoke detection.
    3. Technology, as well as optimized data algorithms and intelligent judgment and other technologies are designed comprehensively. Optical smoke alarm can accurately detect smoke particles with smaller particle sizes, and can distinguish dust, water vapor, smog, pesticides and other interference sources similar to smoke.
    4. Fire detector can be widely used in rail transit, locomotives, shopping malls, warehouses, civil and industrial places such as motor rooms, fresh air ducts in power distribution cabinets, and new energy battery boxes.
    5. The dual sensor smoke alarm also has two high-sensitivity thermistor sensors, which can upload the ready-made temperature to the controller in real time. The temperature parameters can be used as a reference for fire alarm judgment. The dual sensor smoke detectors needs to be connected with the host computer through the RS485 bus.

     Tips: What is photoelectric smoke detector?

    1. Photoelectric or optical smoke detectors consist of an infrared, visible, or ultraviolet source [usually an incandescent bulb or light-emitting diode (LED)], a lens, and a photoelectric receiver (usually a photodiode).
    2. In point detectors, all of these components are arranged in a chamber where the air may contain smoke from nearby fires. In large open areas such as atriums and auditoriums, beam or projected beam smoke detectors are used instead of chambers within the unit: wall-mounted units emit a beam of infrared or ultraviolet light that is received and processed by a separate unit or reflected by a reflector to a receiver.
    3. In some types, especially beam types, the light from the light source passes through the air under test and reaches the photoelectric sensor. The received light intensity is reduced due to scattering by smoke particles, dust in the air, or other matter; circuitry detects the light intensity and issues an alarm when it falls below a specified threshold (possibly due to smoke).
    4. In other types, usually the chamber type, the light is not directed at the sensor and the sensor is not illuminated without particles. If the air in the chamber contains particles (smoke or dust), the light is scattered and part of it reaches the sensor, which triggers the alarm
    Existing reviews of Photoelectric Smoke Detector, Dual Sensor, Smoke Alarm
    Photoelectric smoke detector easy to use
    I purchased the photoelectric smoke detector to replace the old one. The item is surprisingly small and light weight. It is easy to install and have a good useful life. Works great as description to detect smoke in high accuracy.
    From: zoeline | Date: 30/01/2023
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