GX-2009, 4 gas, LEL (isobutane) / O2 / H2S / CO with alligator clip and 115 / 220 VAC charger


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The smallest and lightest 4-gas portable multi gas detector in the world. Weighing only 4.6 ounces, it fits in the palm of your hand (2.75” H x 2.95” L x .98” D). The GX-2009 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 dust-proof 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. Other standard features are vibration alarm, auto-calibration, calibration and bump test lock out or reminder control, STEL / TWA readings, peak hold, auto backlighting at alarm on a large LCD display, and it even tells the time! All of these controls and features are operated through 2 simple glove friendly buttons.
  • 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
  • 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 (Non-adjustable) 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; (optional MSHA version also available) 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 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 47-5084RK-01 SDM-2009 single calibration station 81-SDM2009-01
  • 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, or H2S
Warranty Two years material and workmanship
# 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
6 65-7001RK Dummy sensor for GX-2009
7 21-1881RK Case, rear, GX-2009
8 10-1098RK-01 Screw with split lock and flat washers for alligator or belt clip, GX-2009, 1 each
9 10-1104RK Screw for case or sensor retainer, M2 x 10 mm, GX-2001 or GX-2009, 1 each
10 33-1113RK-01 Metal mesh filter for buzzer hole, GX-2009, 1 each
11 49-0115RK 115 / 220 VAC Adapter for charger (charger base not included), GX-2009
12 07-6018RK Gasket for buzzer hole, GX-2009
13 24-5000RK Flexible printed circuit (FPC), GX-2009
14 49-1050RK Battery, silver oxide, SR 616, 1.55 volts, GX-2009
15 49-1609RK NiMH battery set with hardware for GX-2009, set of 2 batteries
16 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, 1 each
18 07-6008RK-01 O-ring gasket for sensor case, GX-2009, pack of 10
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
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
31 13-0112RK Wrist strap
32 13-0117RK Belt clip, GX-2009

Additional information

Weight 1 lbs