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    Portable Explosion-Proof Hydrogen Sulfide (H2S) Gas Detector

    5 out of 5 based on 3 reviews | Write a review
    Cost-effective hydrogen sulfide (H2S) gas detector is a high performance sensor, IECEX, ATEX, explosion-proof certificates, selectable measuring range of 0 to 50 ppm, 0 to 100 ppm, 0 to 200 ppm, portable design makes it easy to carry. High performance and high precision, best for indoor air quality monitoring.
    SKU: GD400-H2S
    30-day Returns
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    Delivery date: 6-12 days

    High performance portable gas detector has humanized operation functions such as one-key security detection, one-key storage, automatic image flipping, as well as the man down alarm function. The compact design makes it easy carrying.


    • 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-H2S
    Sampling method Pump suction & diffusion dual-use type
    Gas type Hydrogen Sulfide (H2S)
    Principle Catalytic combustion, Electrochemistry
    Measuring range 0 to 50 ppm, 0 to 100 ppm, 0 to 200 ppm
    Resolution 1ppm (0-50/100/200ppm)
    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 Sulfide (H2S) Gas Detector Details


    Applications of Portable Multi Gas Detector

    Tips: What is portable explosion-proof gas detector?

    Portable gas detectors can be used for harmful gas detection, organic VOC gas detection, combustible gas detection and single gas detection. Its development direction is miniaturization and automation, in order to achieve long-term monitoring. The development of portable gas detectors allows the leakage process to be discovered at an early stage. The occurrence of certain disasters is inevitable. How to effectively restrain, monitor and early-warning, and how to reasonably use high-tech means to effectively control accidents and reduce casualties and property losses in response to accidents that have occurred are practical problems that need to be addressed in key production safety technologies. Through the study of the physical and chemical properties in the early stage of the accident, gas detection and monitoring can effectively carry out pre-disaster suppression, so that possible disasters can be controlled in advance, while protecting personal safety. The key to the transition from passive rescue technology to a new generation of active prevention and control technology is intelligent monitoring technology as the core.
    Portable gas detectors are widely used in industrial safety monitoring, indoor air quality testing, hazardous substance testing, and environmental protection monitoring. Aiming at the key links in the process of disaster incubation, occurrence, and development, disrupting the chain development chain is an important link in the safety accident prevention and control technology system.
    The portable gas detector can be divided into diffusion type and pump suction type according to its sampling principle. The so-called diffusion type is to place the probe in the dangerous zone of detecting gas, the gas to be measured is diffused into the probe from the space, and the alarm is placed in the monitoring room for instructions and alarms. The pumping type is to suck the gas to be measured into the detection probe. The suction pump and the built-in gas detector are set together. The detector is set in the dangerous place of the gas to be measured to detect the execution instructions and alarm functions.

    Existing reviews of Portable Explosion-Proof Hydrogen Sulfide (H2S) Gas Detector
    Can you provide a gas detector that meets my client's needs?
    My client needs a portable air quality monitor which includes below. Can you provide:
    Dust (PM10 and PM2.5)
    From: Berte | Date: 25/01/2022
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, but our gas detector can detect the gases (NO2, SO2, O3, CO), but cannot detect the dust (PM10 and PM2.5).
    The use time limit of the gas detector
    Is there a recommended maximum time limit that this leak detector can be on? What I’m asking is can I use it for 4-5 hours straight without an issue of damage to the unit?
    From: Marie | Date: 29/12/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    After the gas detector is fully charged, it can be used normally for about 10 hours, so there is no problem if you use it for 4-5 hours.
    Recommend everyone to buy
    Thanks to the recommendation of ATO for letting me buy this explosion-proof hydrogen sulfide gas detector, it is really very useful. I will recommend everyone to buy it.
    From: Jkober | Date: 01/11/2021
    Was this review helpful? Yes No (0/0)
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