by Fmeaddons


    Smallest Four Gas Confined Space Monitor


    • Simultaneous detection of 4 gases, LEL, O2, H2S & CO
    • Smallest / Lightest 4 gas monitor on the market
    • Dual audible alarm ports
    • 3 visual alarm LED’s
    • Vibration alarm
    • IP-67 water-resistant/dustproof design
    • Calibration and bump test lock out or reminder controls
    • 20 hours of operation (NiMH batteries)
    • Automatic backlighting at alarm
    • Impact resistant over-mold body, RFI shielded body
    • STEL and TWA readouts
    • Intrinsically safe, CSA, C/US classified, IECEx / ATEX approved, SOLAS XI-1/7 Compliant, MSHA approved version available

    Contact RKI Sales


    The smallest and lightest 4-gas portable multi gas detector in the world. The GX-2009. Weighing only 4.6 ounces, it fits in the palm of your hand (2.75” H x 2.95” L x .98” D). It simultaneously monitors and displays combustibles, oxygen, carbon monoxide, and hydrogen sulfide. The GX-2009 represents the latest evolution of gas detection technology. Advancements include dual audible alarm ports and alarm LED’s on 3 sides of the instrument, so that alarm conditions are obvious from multiple perspectives especially in high noise environments. Other features include a water-resistant and dustproof design with IP 67 rating, an impact resistant rubber over-mold body that is RFI resistant, and a large capacity data logging system included as standard.

    GX-2009 Mining Version
    RKI is proud to offer the smallest and lightest 4-gas monitor with an MSHA approval. MSHA (Mine Safety and Health Administration) approval allows this version of the GX-2009 to be used in underground mines, tunnels and excavations under MSHA jurisdiction. The GX-2009 Mining Version simultaneously monitors and displays % volume combustibles, oxygen, carbon monoxide, and hydrogen sulfide.


    • Personal monitoring
    • Confined spaces
    • Refineries/petrochemical
    • Utilities
    • Hazardous material
    • Water/wastewater
    • Fire services
    • Construction


    The GX-2009 is designed around RKI’s compact and proven sensors, utilizing catalytic combustion, electrochemical and galvanic sensor technologies. Each miniaturized sensor is manufactured with the same high quality control that has made RKI sensors and instruments the most reliable and long lasting monitoring devices in the industry.

    Gas Detected
    Combustible Gases (Methane as standard)
    Oxygen (O2)
    Hydrogen Sulfide (H2S)
    Carbon Monoxide (CO)
    Detection Principle Catalytic combustion Galvanic cell Electrochemical cell
    Detection Range (Increments) 0 ~ 100% LEL (1% LEL) 0 ~ 40.0% Vol.
    (0.1% Vol.)
    0 ~ 100.0 ppm (0.5 ppm) 0 ~ 500 ppm (1 ppm)
    Accuracy Statement ± 5% of reading or ± 2% LEL (whichever is greater) ± 0.5% O2 ± 5% of reading or ± 2 ppm H2S (whichever is greater) ± 5% of reading or ± 5 ppm CO
    (whichever is greater)
    Sampling Method Diffusion sampling standard / hand aspirator or motorized pump optional
    Display Digital LCD displays all four gases simultaneously, with auto backlight
    Preset Alarms
    (User Adjustable)
    Overscale alarm
    1st alarm 10% LEL
    2nd alarm 50% LEL
    Over alarm 100% LEL
    Low alarm 19.5%
    High alarm 23.5%
    Over alarm 40.0%
    1st alarm 5 ppm
    2nd alarm 30 ppm
    TWA alarm 1 ppm
    STEL alarm 5 ppm
    Over alarm 100 ppm
    1st alarm 25 ppm
    2nd alarm 50 ppm
    TWA alarm 25 ppm
    STEL alarm 200 ppm
    Over alarm 500 ppm
    Types of Alarms Gas Alarm: 2 Increasing alarms, STEL, TWA, overscale alarm. O2 decreasing/increasing.
    Trouble alarm: Sensor disconnection, low battery, circuit error, calibration range error
    Display of Alarm Gas Alarm: Flashing LEDs, intermittent buzzer (95 db @ 30 cm), flashing gas value, vibration
    Trouble alarm: Flashing LEDs, intermittent buzzer (95 db @ 30 cm), display of error message
    Operating Temp. & Humidity -4°F to 122°F (-20°C ~ +50°C), 0 to 95% RH, non-condensing (splash resistant)
    Response Time Within 30 seconds (T90)
    Continuous Operation 20 hours after a 3 hour full charge (14 hours after 90 min charge)
    Power Source Direct charging NiMH batteries, set of 2
    Safety Design / Approvals IECEx zone 0 Ex ia IIC T4; ATEX II 1G Ex ia IIC T4;
    c CSA us classified, as intrinsically safe. Class I, Division 1, Groups A, B, C, D
    Dimension & Weight 2.7” H x 3” W x 1” D (Approx. 70 H x 75 W x 25 D mm), 4.6 ounces (approx. 130 g)
    Case Material High impact over molded rubber. Dust and water resistant with IP-67 approval.
    Controls Two glow in the dark buttons: POWER / MODE, AIR
    Datalogging Standard with all instruments. Stores 8 alarm trend sessions where readings are recorded 30 minutes
    before and after an alarm event. 3,600 data point capacity with a log time range of 10 to 300 hours
    (based on programmable interval times); and stores up to 100 calibration records.
    Required Accessories Battery charger
    Standard Accessories Alligator clip 13-0116RK
    NiMH batteries (set of 2) 49-1609RK
    Charging station with 115/220 VAC power supply (also available without power supply, 49-2170RK) 49-2170RK-01
    Product CD (includes datalogging software) 71-8002RK
    Optional Accessories Belt Clip 13-0117RK
    Padded carrying case for GX-2009 and accessories 20-0112RK-01
    Charging station, 115/220 VAC powered for 2, 3, 4, or 5 instruments 49-2170RK-XX
    Charging station with 12 VDC power supply and vehicle adapter plug 49-2171RK
    12 VDC adapter with vehicle plug (does not include charger base) 49-2020RK
    RP-2009 pump with 4” rubber nipple, 10’ hose and probe (up to 40’ hose available) 81-1177RK
    RP-6 sample drawing pump with 10’ hose and probe (up to 40’ hose available) 81-1166RK
    Hand aspirated sample draw with 10’ hose and probe (up to 40’ hose available) 81-1160RK
    USB to IrDA downloading cable 47-5027RK
    SDM-2009 single calibration station 81-SDM2009-01
    Configurations • 4 gas, LEL / O2 / H2S / CO • 3 gas, LEL / O2 / H2S • 3 gas, LEL / O2 / CO
    • 2 gas, LEL / O2 • 2 gas, O2 / H2S • 2 gas, O2 / CO
    • Single gas LEL, O2, CO, H2S
    Warranty Two years material and workmanship


    GX-2009 parts

    # Part Number Description
    1 21-1880RK Front case, GX-2009
    2 07-6017RK-01 Gasket for GX-2009 case, one each
    3 30-1054RK Vibration motor for the GX-2009
    4 51-1119RK LCD module assembly with flat cable for GX-2009
    5 57-2052RK PCB main assembly, GX-2009
    5 65-7001RK Dummy sensor for GX-2001 or GX-2009
    6 21-1881RK Case, rear, GX-2009
    7 10-1098RK-01 Screw with split lock and flat washers for alligator or belt clip, GX-2009, 1 each
    8 10-1104RK Screw for case or sensor retainer, M2 x 10 mm, GX-2001 or GX-2009, pack of 100
    9 33-1113RK-01 Metal mesh filter for buzzer hole, GX-2009, 1 each
    9 49-0115RK 115 / 220 VAC Adapter for charger (charger base not included), GX-2009
    10 07-6018RK Gasket for buzzer hole, GX-2009
    11 24-5000RK Flexible printed circuit (FPC), GX-2009
    12 49-1050RK Battery, silver oxide, SR 616, 1.55 volts, GX-2009
    13 49-1609RK NiMH battery set with hardware for GX-2009, set of 2 batteries
    14 13-0119RK Alligator clip, GX-2009
    17 21-1883RK Sensor case with PCB assembly, GX-2009
    18 07-6008RK O-ring gasket for sensor case, GX-2009, pack of 10
    18 07-6008RK-01 O-ring gasket for sensor case, GX-2009, 1 each
    19 OS-BM2 Sensor, Oxygen (O2) for GX-2001/GX-2003/GX-2009/GasWatch 2/OX-01
    20 NC-6264A Sensor, LEL, for GX-2001/GX-2003/GX-2009/GP-01
    21 ES-1821 Sensor, Carbon Monoxide (CO) for GX-2001/GX-2003/GX-2009/GasWatch 2/CO-01
    22 ES-1827i Sensor, Hydrogen Sulfide (H2S) for GX-2009
    23 07-6019RK Sensor chamber gasket,for sensor retainer,GX-2009
    24 21-1882RK Sensor retainer, GX-2009 (inner piece)
    25 33-7114RK Filter disk, H2S scrubber, 5 pack, for combustible diffusion port, set of 5
    26 33-7102RK Filter, charcoal, for CO sensor, pack of 5
    26 33-7102RK-01 Filter, charcoal, for CO sensor, 1 each
    27 07-6021RK Gasket, sensor retainer
    28 33-0172RK Sensor Cover, water proof, sheet for 4 sensors, GX-2009, 1 each
    29 21-1884RK Sensor cover, GX-2009 (outside piece)
    30 10-1104RK-01 Screw for case or sensor retainer, M2 x 10 mm, GX-2001 or GX-2009, 1 each
    31 13-0112RK Wrist strap, GX-2001/GX-2003
    32 13-0117RK Belt clip, GX-2009


    GX-2009 Software

    Data Logger Management Software
    User Setup Program Software
    SDM-2009 Software
    (Calibration Station)
    GX-6000 Datalogging Manual
    GX-2009 Datalogging Manual
    GX-2009 User Setup Manual
    GX-2009 User Setup Program Manual

    Manuals & Literature

    GX-2009 datasheet
    GX-2009 Product Datatsheet
    Calibration Station User Guide
    GX-2009 Operator's Manual

    GX-2009 Operator’s Manual

    GX-2009 spanish datasheet
    GX-2009 Spanish Datasheet
    GX-2009 Quick CHeck Cylinder Manual
    GX-2009 Quick Check Cylinder Supplement
    GX-2009 Spanish Manual
    GX-2009 Spanish Operator’s Manual
    GX-2009 Quick Reference Card
    Quick Reference Card
    GX-2009 Spanish reference card
    Spanish Quick Reference Card
    GX-2009 User Setup Manual
    GX-2009 User Setup Program

    Training Video

    This video is also available on YouTube and CD (by request)