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    Fixed Sulfur Dioxide (SO2) Gas Detector, 0 to 20/50/100 ppm

    Favorable price SO2 sulfur dioxide gas detector with alarm light is a 24h continuously wall mounted type gas detector which can detect SO2 in different kinds of situations. Measuring range 0 to 20/50/100 ppm, powered by 24V DC, with 4-20mA, RS485, relay signal output.
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    Delivery date: 6-12 days

    Economical price fixed SO2 sulfur dioxide gas detector uses high quality sensors, and advanced micro-process technology, with data display and high/low alarm, fast response, high precision and good stability. Explosion proof, suitable for different kinds of situations.


    • Model: ATO-YT95H-SO2
    • Detected Gas: SO2 Sulfur dioxide
    • Measure Range: 0-20ppm, 0-50ppm, 0-100ppm
    • Install Method: Wall-mounted, piping type, flow-type
    • Output Signal (Optional): 4-20mA, 1-5V, 2-10V, RS485, RS232, relays
    • Precision: ≤±3%F.S. (higher precision is available)
    • Zero shift: ≤±1%(F.S./year)
    • Display: 4 digits Nixie tube display.
    • Connection mode: G1/2 external thread explosion-proof flexible pipe
    • Thread Size: M45*2mm
    • Temperature: -20℃ ~ 50℃
    • Humidity: 0-95%RH (non-condensing)
    • Explosion-Proof: Ex dⅡCT6
    • Degree of Protection: IP65
    • Alarm Mode: Sound, light
    • Material: Case: Die-cast aluminum, Sensor housing: aluminum alloy or 316 stainless steel
    • Power: 12-36V DC
    • Dimensions: 180×150×90mm
    • Weight: 1.6kg
    • Approval: CE, CNEX explosion proof certificate, CMC (China Metrology Certification)
    • Warranty: 12 months


    • The output signal 4-20mA and RS485 CANNOT be used at the same time.
    • To measure confined spaces such as pipelines, please contact us and inform the detailed conditions of use.


    Online monitoring with sound/light alarm

    • 24h continuously monitoring, data will real-time display.
    • High/low alarm with sound and light, sound >90dB, alarm point is settable.

    Non-contacted control the device

    • With infrared ray controller, which can remote control alarm point settings, zero calibration, and address modification.

    Iversified output signals

    • 4-20mA current signal output, compatible with different kinds of controllers.
    • RS485 digital signal output.
    • Relay signal output, to turn on/off ventilator, generators or other external devices.

    Variety of installation methods

    • Wall mounted type, installed on the wall directly, real time monitoring.
    • Piping type, installed on the pipeline, monitoring the gas concentration inside.
    • Flow type, connected with external sampling pump and tube, measure the gas concentration in enclosed space.

    Data transmission

    • Can be installed with computer software, to transmit the data to computer, workers can remote monitor the data.

    High quality case

    • Die-cast aluminum case, strong and durable; Stainless steel case is available for choose, meeting the demand of different situations.
    • IP65 protection degree, water-proof, dust-proof, explosion-proof


    Applications of Portable Multi Gas Detector

    Tips: Gas detector troubleshooting

    • The number cannot be displayed correctly
      If the gas detector has been used for a long time, or it has not been calibrated for a long time, there will be a problem of incorrect readings. We all know that the gas detector is mainly detected by the internal sensor. The sensor has a certain life. When used for a certain number of times, the sensitivity of the sensor decreases, which affects the detection result. In addition, if the calibration is not carried out for a long time, the test results will also be affected.
    • The gas detector cannot inhale
      This type of problem mainly occurs on pump-aspirated gas detectors. A small suction pump inside the detector is used to inhale gas for detection. Once the suction pump is damaged or other failures, the gas detector will not be able to inhale. This problem is easy to deal with, and a new suction pump can be replaced.
    • The gas detector fails
      Such faults are prone to occur in special working environments, such as the presence of a lot of dust and oil in the detection environment, which will contaminate the gas detector and lead to failure. In such an environment, the gas detector needs to be cleaned.
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