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

    Portable multi-gas detector is designed for monitoring CO (0-1000ppm), H2S (0-100ppm), O2 (0-30%VOL), EX (0-100%LEL). Reliable gas detector comes with highly accurate sensors, sound & light vibration alarms, light weight, mini size and long battery life.
    SKU: GD500-4GAS
    i h
    🚚 Free shipping
    🔙 30-day returns
    📅 Delivery: 7-12 days

    sisco gas detector can measure 4 gases (CO, H2S, O2, LEL) at the same time with high accuracy and reliability, min size and high portability. Handheld multi-gas detector is widely used in oil, metallurgy, chemical, medical, agriculture, refinery and other industries.

    Portable multi gas detector sensors
    • Using 4 different high-precision sensors/Provides a data storage function

    • The portable multi-gas detector employs the original imported high-precision sensor.
    • Four random gas sensors can be combined freely.
    • sisco handheld multi 4-gas detector can record 100 sets alarm data, alarm record can be checked on the device.
    • Data storage function, gas detector can record 100 thousand set data, and historical data can be viewed on the device (optional function).
    • Strong and upscale alligator clip, convenient to take along during operation.
    • Special engineering plastics housing of high intensity, strong and durable, exquisite and comfortable in touch.
    Handheld multi gas detector

    Multi gas detectors can detect any four gases (CO, H2S, O2, LEL) at the same time.

    • The gas detector is available with an LCD dot matrix display and Chinese and English operation modes.
    • The gas concentration unit PPM and mg/m3 can be shifted quickly.
    • The battery and voltage can be checked with one press.
    • One press to restore factory settings.
    • Ultra-high buzzer alarm sound, alarm with sound, light and vibration at the same time.
    • Rechargeable lithium polymer battery of large capacity, which ensures the gas detector works continuously for a long time.


    Portable multi gas detector details


    sisco portable 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 multi gas detector applications

    Model GD500-4GAS
    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 Monochrome dot matrix 128*128 LCD graphic display
    Backlight Backlight time is settable; the backlight will be auto-on when alarming.
    Data Logging (Optional Function) Storage capacity of over one hundred thousand sets. Interval time ranging from 10~3600 seconds are settable.
    Alarms Sound, light and vibration
    Operation Language Chinese/English
    Gas Unit Gas units ppm and mg/m3 are switchable
    Battery 3.7V rechargeable lithium battery with 2300mAh capacity
    Operating time is about 10-12h
    Charger Travel charger with USB. Typical charge time: 4-6 hours.
    Explosion-proof Grade Exia ll CT3
    Case Material ABS+PC
    Protection Grade IP65
    Operating Temperature -20℃~50℃
    Operating Humidity 0~90%RH (non-condensing)
    Dimension 131*85*35mm
    Weight 240g

    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 using a portable multi gas detector

    1. Before using the gas detector, please read the product instruction manual carefully.
    2. It is strictly forbidden to open the cover and replace the sensor in the field.
    3. Installation, commissioning, setting and other operations must be carried out by professionals.
    4. Calibration checks should be carried out on a regular basis, and sensors that are beyond the effective service period and faulty should be replaced in time.
    5. It is strictly forbidden to use gas higher than the measuring range to impact the sensor.
    6. Prevent the gas detector from being dropped from a height or subjected to violent shocks.
    7. It is strictly forbidden to expose the gas detector to a high-concentration corrosive gas environment for a long time to prevent damage to the sensor.
    8. The gas detector cannot be used in a high temperature and high humidity environment. If the ambient humidity is high, a filter and dehumidification device must be added.

    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 1
    Write your own review Close
    Haly01 | 10/6/2023 2:26 AM
    Perfectly meet my needs
    This portable multi-gas detector is awesome! I am an occupational safety officer and need to monitor various gases on a daily basis to ensure workplace safety. Its excellent performance and amazing portability perfectly meet my needs, and it can detect 4 different gases at the same time, which is very useful for a variety of industrial environments.