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    Handheld Multi-Gas (4-Gas) Detector, CO, H2S, O2, LEL

    5 out of 5 based on 1 reviews | Write a review
    Multi-gas detector provides detection and monitoring of 4 gases including CO, H2S, O2, LEL with high accurate sensors, and sound and light alarms, light weight and compact size, easy to carry, long battery life, reliable quality and cost effective.
    Free Shipping Worldwide
    Delivery date: 6-20 days

    Multi gas detector can measure 4 gases (CO, H2S, O2, LEL) at the same time with high accuracy and reliability, and it is widely used in oil, metallurgy, chemical, medical, agriculture, refinery and other industries.


    • Use high accuracy sensors
    • LCD dot matrix display, easy to read
    • Gas unit ppm and mg/m3 can be switched quickly
    • Alarm with ultra-high buzzer sound and light, high and low alarm values are settable
    • Rechargeable lithium polymer battery with high capacity enables long working time
    • With a clip, easy to carry
    • Rugged and durable housing, comfortable touch


    Model ATO-YT-1200H-M4
    Sampling Method Diffusion
    Gas Carbon Monoxide (CO), Hydrogen Sulfide (H2S), Oxygen (O2), Combustible (LEL)
    Range CO: 0 to 1000ppm, H2S: 0 to 100ppm, O2: 0 to 30%VOL, EX: 0 to 100%LEL
    Resolution CO: 1ppm, H2S: 0.1ppm, O2: 0.1%VOL, EX: 1%LEL
    Accuracy ≤±3%F.S.
    Display LCD dot matrix display
    Backlight Backlight time is settable; the backlight will be auto on when alarming.
    Signal Output (Optional) High speed data transmission by USB, available for data downloading and printing
    Alarms Sound and light
    Operation Language Chinese/English
    Gas Unit Gas units ppm and mg/m3 are switchable
    Battery 3.7V rechargeable lithium battery
    Operating time about 13h
    Typical charge time less than 6 hours
    Explosion-proof Grade Exia ll CT4
    Protection Grade IP65
    Operating Temperature -20℃~50℃
    Operating Humidity 0~90%RH (non-condensing)
    Dimension 155*78*35mm
    Weight 300g

    Tips: What does it mean, the gas units PPM, %LEL, %VOL in multi-gas detector's specification?

    1. PPM
    PPM refers to parts per million, a unit of gas volume concentration.
    For solution: it means that there’s 1/1000 ml solute in the 1L aqueous solution, so its concentration is 1ppm.
    For gas: it’s one of representation method of pollutant concentration in the ambient atmosphere (air).
    2. %LEL
    LEL refers to the lower explosive limit. When the combustible gas reaches 100%LEL, it’s easy to explode, and the explosion occurs as soon as contacting an electric spark. Therefore, 0-100%LEL generally refers to the range of combustible gas measurement. For example, hydrogen: 4%VOL=100%LEL, methane: 5%VOL=100%LEL.
    3. %VOL
    VOL refers to the volume ratio of target gas in per volume. It’s generally used for high concentration. 1%VOL is equal to 10000PPM, and generally it is for oxygen and combustible gases. For example, how much oxygen in a space.

    Existing reviews of Handheld Multi-Gas (4-Gas) Detector, CO, H2S, O2, LEL
    Useful multi gas detector.
    Useful multi gas detector. It helps me a lot in my work.
    From: Zachary | Date: 28/08/2018
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