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    Fixed Phosphine (PH3) Gas Detector, 0 to 100/1000/3000 ppm

    Selling a PH3 phosphine gas detector with an alarm light at a low price. This is a wall-mounted explosion-proof gas detector with a measuring range of 0 to 100/1000/3000 ppm. It can work continuously for 24 hours and is powered by 12-24V DC, the gas detector has a connection distance of >1000m, and the protection level is IP65.
    SKU: GD300-PH3
    Free Shipping Worldwide
    Delivery date: 6-12 days

    The economical and affordable fixed PH3 phosphine gas detector adopts high-quality sensors and advanced micro-processing technology. The operating temperature is -20~+50℃. It uses gas diffusion to detect whether there are toxic gases in the air. It can work continuously for a long time. The working voltage is 12-30V DC, it can detect 0-100/1000/3000 ppm, the gas leak detector can display data and alarm reminders on the screen, and the response speed is fast.


    • Model: GD300-PH3
    • Detected Gas: PH3 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.


    Fixed Sulfur Dioxide (SO2) Gas Detector Details


    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: How Does a Fixed Phosphine (PH3) Gas Detector Work?

    • Gas Collection: The primary task of a gas detector is to collect air samples from the surrounding environment. This is usually accomplished through an air inlet or sampling line.
    • Gas Sensor: The gas leak detector has a built-in phosphine gas sensor, which usually uses chemical sensing elements, such as semiconductor sensors, electrochemical sensors, or infrared sensors. These gas sensors work by reacting to phosphine molecules, causing changes in electrical resistance, electrical current, or optical signals.
    • Signal Processing: The gas sensor generates an electrical signal that correlates to the detected phosphine concentration. This signal is fed into a built-in microprocessor or control unit for processing.
    • Data Analysis: A microprocessor analyzes the signal generated by the sensor and converts it into a concentration reading. If the concentration exceeds a preset safety threshold, the gas monitor triggers an gas alarm.
    • Alarm Systems: Fixed phosphine gas detectors are often equipped with audible, light, or digital interface alarm systems, as well as features that can transmit information to a monitoring room or automatically shut down the device. This helps to detect dangers early and take necessary measures.
    • Maintenance and Calibration: To ensure the accuracy and reliability of your gas detector for home, regular maintenance and calibration are required. This includes replacing or cleaning sensor elements, verifying gas detector performance, and calibrating measurements.
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