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    Portable Explosion-Proof Multi Gas Detector, 4-Gas, CO, H2S, O2, LEL

    Portable explosion-proof gas detector can detect 4 gases at the same time, including CO (0-1000ppm), H2S (0-100ppm), O2 (0-30%VOL), EX (0-100%LEL). It has IECEX, ATEX explosion-proof certificates, protection level reaches IP67, compact ergonomic design makes it easy to carry. The gas detector can effectively filter water, oil, dust and other impurities, widely used in harsh industrial environments such as coal mines and petroleum fields.
    SKU: GD400-4GAS
    i h
    🚚 Free shipping
    🔙 30-day returns
    📅 Delivery: 7-12 days

    Handheld gas detector has IECEX, ATEX explosion-proof certificates,   protection level reaches IP67, can effectively filter water, oil, dust and other impurities, widely used in harsh industrial environments such as coal mines and petroleum fields. High accuracy multi gas detector is designed for detecting 4 gases at the same time, including CO (0-1000ppm), H2S (0-100ppm), O2 (0-30%VOL), EX (0-100%LEL), compact ergonomic design makes it easy carrying. 

    Explosion proof multi gas detector

    Explosion-proof gas detector can effectively resist a three-meter drop.

    • sisco portable explosion-proof gas detector has got IECEX, ATEX, explosion-proof certificates and the explosion-proof level reaches Exia IICT4 Ga. The alarm function for personnel falling to the ground ensures the safety of underground operators.

    • 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.

    • The gas detector is equipped with a safety reminder function, sound and light vibration alarm function and high & low alarm latched function allowing the operator to better capture the sudden change of the gas concentration value.

    Explosion-proof multi gas detector

    Portable gas detector with built-in powerful sampling pump, fast detection speed. 

    • The explosion-proof gas detector can be connected 20m sampling tube externally, which is convenient for long-distance or confined space detection.
    • With a water trap filter, the multi gas detector 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.
    • Suction and diffusion dual-purpose device. Standard storage function, one-click data export, convenient for users to analyze.
    • sisco portable gas detector is available with a unique modifiable ID identification function and automatic detection functions, automatic prompts for voltage, and pump failure alarms.
    • The gas detector supports each channel sensor to restore the factory setting separately and multi-language including English, Chinese and etc.


    Explosion-proof multi gas detector details


    sisco explosion-proof gas detectors can be used to quickly detect CO, H2S, O2, LEL, widely used in petrochemical, fire protection, municipal construction, mines, food safety, laboratories and other industries.

    Portable explosion proof multi gasdetector applications

    Model GD400-4GAS
    Sampling method Pump suction & diffusion dual-use type
    Gas type CO, H2S, O2, LEL
    Principle Catalytic combustion, Electrochemistry
    Measuring range O2: 0-30%VOL, EX: 0-100%LEL, CO: 0-1000PPM, H2S: 0-100PPM (More measuring range can be customized)
    Resolution O2: 0.01%VOL, EX: 1%LEL, CO: 1PPM, H2S: 0.01PPM
    Response time ≤30 seconds
    Precision ≤±2%F.S except for special gases
    Language Chinese/English(More languages 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 x 96) , the 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 a 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

    Q1: What is a gas detector?
     A gas detector is an instrument for gas leakage concentration detection, including a portable gas detector, handheld gas detector, fixed gas detector, online gas detector, etc.

    Q2: What does a gas detector detect?
    A2: Combustible gases: Natural gas (methane), liquefied gas, coal gas (hydrogen), acetylene, pentane, alkynes, acetone, toluene, alcohols, hydrocarbons, light oil, etc.
    Toxic gases: Carbon monoxide, hydrogen sulfide, ammonia, chlorine, oxygen, phosphine, sulfur dioxide, hydrogen chloride, chlorine dioxide and other toxic and harmful gases.

    Q3: What is ppm of gas detector?
    A3: Parts per million or "ppm" is often used as a fractional measure of concentration. For example, a methane (molecular) concentration of 2% means that 2 out of every 100 air molecules are methane. Likewise, a methane concentration of 2 ppm means that 2 out of every 1 million air molecules are methane.

    Tips for maintaining a portable explosion-proof gas detector

    1. Check the gas flow rate, usually 30/h. Excessive or too small flow will have a greater impact on the portable gas detector results.
    2. Replace the filter paper of gas detector: stop the air pump and drain the filter tank.
    3. Check whether there is any air leakage in the gas system. Whether the diaphragm of the sobbing pump is damaged, whether the sealing ring of the sampling probe is broken, whether the four-way valve and condensate are damaged, etc.
    4. Cleaning the sampling probe of gas detector and dredging the sampling hole pipeline
    5. Check whether the condenser is working normally, usually, the temperature is adjusted within 3℃.
    6. Check the measuring device room to see if it is dirty, and clean it in time.

    Thank you for buying industrial test and measurement equipment on, all products sold by SISCO and the partner cover a 12 months warranty, effective from the date of receiving the products.

    What is covered?

    SISCO is responsible for providing free spare parts, and free technical support to assist the customer to repair the defective products until the problem is solved.

    What is not covered?

    • Product purchased from anyone other than a SISCO store or a SISCO authorized reseller.
    • Expendable parts.
    • Routine cleaning or normal cosmetic and mechanical wear.
    • Damage from misuse, abuse or neglect.
    • Damage from use of parts other than SISCO approved.
    • Damage from use outside the product’s usage or storage parameters.
    • Damage from use of parts not sold by SISCO.
    • Damage from modification or incorporation into other products.
    • Damage from repair or replacement of warranted parts by a service provider other than a SISCO authorized service provider.
    • Damage caused by the application environment not meeting the product usage requirements and the failure to perform preventive maintenance.
    5.0 2
    Write your own review Close
    Matthew | 3/6/2023 11:43 PM
    High-quality explosion-proof detector
    I bought this explosion-proof gas detector for my work safety. I appreciate its safety reminder feature, and sound and light vibration alarm function, which provides me with the information I need to act quickly and avoid potential hazards.
    White | 3/6/2023 10:42 PM
    Excellent gas detector
    This multi explosion-proof gas detector is an essential tool for any workplace that handles hazardous materials. It can measure 4 gas, easy to use, extremely reliable, helping us maintain a safe work environment.