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    Portable Explosion-Proof Hydrogen (H2) Gas Detector

    5 out of 5 based on 4 reviews | Write a review
    Portable Hydrogen (H2) gas detector for sale at best price, high performance, with IECEX, ATEX, explosion-proof certificates, measuring range of 0 to 500 ppm, 0 to 1000 ppm, 0 to 2000 ppm, 0 to 5000 ppm available, compact design makes it easy carrying.
    SKU: GD400-H2
    30-day Returns
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    Delivery date: 6-12 days

    High performance portable gas detector is a suction and diffusion dual-purpose device. When the air pump fails or in special emergency situation, it can automatically switch to the diffusion sampling method, thereby improving the protection to a new level.


    • The portable gas detector can effectively resist a three-meter drop, has passed the EMC anti-static interference test and can work normally in the walkie-talkie environment.
    • It has got IECEX, ATEX, explosion-proof certificates and the explosion-proof level reaches Exia IICT4 Ga. The man down alarm function has upgraded the safety of underground operators.
    • Password protection function prevents non-operators from modifying menu parameters. With safety reminder function, sound and light vibration alarm function, let operators work without worries. The high and low alarm latched function allows the operator to better capture the sudden change of the gas concentration value.
    • Real-time value, TWA, STEL, MAX, MIN multiple numerical display, and the screen can be automatically turned 180 degrees, which is convenient for viewing in special operating environments.
    • Built-in powerful sampling pump, fast detection speed. It can be connected 20m sampling tube externally, which is convenient for long-distance or confined space detection.
    • Pump suction and diffusion dual use, to provide operators with more reliable protection. With a water trap filter, it can effectively filter water, oil, dust and other impurities. It can also be used in harsh industrial environments such as coal mines and petroleum fields.
    • Beautiful and friendly user interface, reasonable and easy-to-use interactive mode. Standard storage function, one-click data export, convenient for users to analyze.
    • Unique modifiable ID identification function, convenient for users to allocate and manage the instrument. A full range of automatic detection functions, automatic prompts for voltage, pump failure alarms, etc., more comfortable to use.
    • One-key open storage, automatic image flip. It supports each channel sensor to restore the factory setting separately and multi-language including English, Chinese and etc.


    Model GD400-H2
    Sampling method Pump suction & diffusion dual-use type
    Gas type Hydrogen (H2)
    Principle Catalytic combustion, Electrochemistry
    Measuring range 0 to 500 ppm, 0 to 1000 ppm, 0 to 2000 ppm, 0 to 5000 ppm
    Resolution 0.1ppm (0-500 ppm) or 1ppm (0-1000/2000/5000 ppm)
    Response time ≤30 seconds
    Precision ≤±2%F.S except for special gases
    Language Chinese/English (More language can be customized)
    Automatically test and calibrate after power-on Including reset, maximum value (MAX), minimum value (MIN), STEL, TWA value
    Unit PPM and mg/m3 can be switched and displayed by one key, and the concentration value is automatically converted by the system
    Display Monochrome graphics (160 x96), screen can be automatically flipped
    Backlight The backlight time can be manually set, and will be turned on automatically
    when an alarm is issued
    Data record Can store 100,000 sets data, the storage interval is adjustable from 5 to 3600 seconds, data can be exported, with data cable
    Alarm 95dB buzzer (@30cm), vibration alarm and flashing red LED and alarm
    status indication on the screen, alarm latched; diagnostic alarm and battery undervoltage alarm, pump block alarm; man down alarm, with early warning and optional real-time remote Bluetooth notification function
    Battery 3.7V rechargeable lithium battery, battery capacity 2200mA
    Working hours More than 15 hours in continuous pumping mode
    Charger Travel charger with DC interface, charging time ≥ 4 hours
    Explosion-proof grade ll 2G Ex ia ll CT4 Ga
    (EU regulations)
    Protection grade IP67
    Working temperature -20℃~+50℃
    Humidity 0~90%RH (no condensation)
    Environmental pressure 86~106Kpa
    Size 157*84.5*59.5mm (including back clip/water trap filter) (length * width * height)
    Weight 365g (including battery, belt clip and filter)
    Package Included 1 piece Gas detector, 1 piece 12V/1A DC power adapter, 1 piece USB cable, 1 piece User manual, 1 piece Warranty card, 1 piece Filter, 1 piece Aluminum suitcase


    Portable Explosion-Proof Hydrogen (H2) Gas Detector Details


    Applications of Portable Multi Gas Detector

    Tips: How to prevent the hydrogen leakage of the H2 gas detector?

    The hydrogen gas detector is a personal portable gas detection alarm, which equipped with an electrochemical sensitive sensor. It is suitable for continuous detection of the percentage concentration of oxygen in the ambient air of industrial and mining enterprises. Low-limit sound, light, and vibration alarm to warn people on site to evacuate the dangerous area as soon as possible.

    Measures to prevent hydrogen leakage from the H2 detector:

    • Strengthen equipment safety management, and regularly check hydrogen pipelines that are prone to corrosion and damage with a hydrogen detector. The leaking pipeline was found to be repaired in time.
    • Strict open flames appear on the road section of the hydrogen pipeline, and workers entering and exiting hydrogen use or transportation areas need to wear anti-static overalls. Use mobile phones or non-explosion-proof lighting tools strictly in areas where hydrogen exists, do a good job of insulating cable laying in the workshop; use more corrosive materials in the rigorous workshop.
    • Strengthen employee safety awareness, launch safety knowledge training activities, and establish a sound safety management model.
    • Install a fixed hydrogen alarm and use it with a hydrogen detector to realize 24 hours of uninterrupted online work anytime, anywhere, and achieve double protection.

    Precautions for post-maintenance of H2 detector:

    • The gas calibration has been done before leaving the factory. After installation, please do not change the components at will. If you need to replace it, you must re-calibrate.
    • The normal service life is 3 years. Due to the difference in the use environment, its service life may be reduced, and inspection and maintenance should be carried out regularly every year.
    • High-concentration hydrogen shock is forbidden in the parts to avoid poisoning the gas sensor and damaging the detector.
    • During the use process, check whether the hydrogen gas detector is working normally, and the check period should be kept within 3 months at least.
    Existing reviews of Portable Explosion-Proof Hydrogen (H2) Gas Detector
    Questions about your hydrogen gas detector
    For your hydrogen gas detetcor, Does it continuously check the hydrogen leakage automatically or we need to check it manually? Can we use this device for continuous monitoring of the hydrogen leakage 24 x 7 ?
    From: Juliene | Date: 19/01/2022
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, it continuously checks the hydrogen leakage automatically.
    And, you can use this device for continuous monitoring of the hydrogen leakage 24 x 7.
    Questions about gas detector
    1) What is the lowest concentration of methane that can be detected in air (ppm)? We will be working at very low levels.
    2) Is 100% relative humidity a problem? We must analyze the headspace above water samples.
    3) What is the expected delivery time? We wish for delivery to Denmark.
    Thanks so much.
    From: Alecx | Date: 23/12/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    1. The lowest concentration of methane that can be detected in air is 1000ppm.
    2. If the humidity in the air is approximately 100%, we shall equip the gas detector with a filter.
    But our gas detector cannot detect methane in water or liquid.
    3. Lead Time: 5 days.
    Questions about gas detectors
    I would like to know what cross sensitivity this model has. We work in a facility where we use acetone and ipa to clean parts and our current LEL monitor is picking this up and not instilling confidence in our measurement of H2 around the special atmosphere furnace.
    From: Joanne | Date: 19/11/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Ok, if you want to measure H2 GAS in your below gas environment, then yes, we recommend using model SKU: ATO-GAS-H2 with 0-1000ppm measuring range, which has no interference with other gases and will not be interfered by other gases.
    Measuring range of hydrogen gas detector
    Hi, I'm looking for a meter that can read 1-100% hydrogen in other flammable gases, with a background of natural gas (mix of methane, ethane, and heavier hydrocarbons)? 0-100% hydrogen is desired. If there is a loss of accuracy at high or low end, that might be OK.
    From: Kelsey | Date: 13/10/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Unfortunately, it is not possible to detect 100% VOL hydrogen in the mixed gas. You can choose any other measurement ranges. The H2 gas detector can be used in the air or in natural gas, but for measuring the hydrogen in natural gas, 0 -100%VOL is not available.
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