The GX-2009 is 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.
Part NumberDescription
121-1880RKFront case, GX-2009
207-6017RKGasket for GX-2009 case, one each
330-1054RKVibration motor for the GX-2009 and GX-6000
451-1119RKLCD module assembly with flat cable for GX-2009
557-2052RKPCB main assembly, GX-2009
621-1881RKCase, rear, GX-2009
710-1098RKScrew with split lock and flat washers for alligator or belt clip, GX-2009, 1 each
810-1104RKScrew for case or sensor retainer, M2 x 10 mm, GX-2001 or GX-2009, 1 each
933-1113RKMetal mesh filter for buzzer hole, GX-2009, 1 each
1007-6018RKGasket for buzzer hole, GX-2009
1124-5000RKFlexible printed circuit (FPC), GX-2009
1249-1050RKBattery, memory backup, silver oxide, SR 616, 1.55 volts, GX-2009 and GX-6000Battery, memory backup, silver oxide, SR 616, 1.55 volts, GX-2009 and GX-6000
1349-1609RKNiMH battery set with hardware for GX-2009, set of 2 batteries
1413-0119Clip, alligator, with mounting screws, new type, GX-2009
1721-1883RKSensor case with PCB assembly, GX-2009
1807-6008RKO-ring gasket for sensor case, GX-2009, 1 each
1807-6008RK-01 O-ring gasket for sensor case, GX-2009, pack of 10
19OS-BM2Sensor, Oxygen (O2) for GX-2009/GX-2012/GX-6000/GasWatch 2/OX-03/Gas Tracer
19OS-BM2-05Sensor, Oxygen (O2) for GX-2009/GX-2012/GX-6000/GasWatch 2/OX-03/Gas Tracer (pack of 5)
20NC-6264ASensor, LEL, for GX-2009/GX-2012/GX-6000/GP-03/Gas Tracer
21ES-1821Sensor, Carbon Monoxide (CO) for GX-2009/GX-2012/GX-6000/CO-03/GasWatch 2/Gas Tracer
22ES-1827iSensor, Hydrogen Sulfide (H2S) for GX-2009/GX-2012/GX-6000/HS-03/GasWatch 2Sensor, Hydrogen Sulfide (H2S) for GX-2009/GX-2012/GX-6000/HS-03/GasWatch 2
2307-6019RKSensor chamber gasket for sensor retainer, GX-2009, 1 each
2421-1882RKSensor retainer, GX-2009 (inner piece)
2533-7114RKFilter disk, H2S scrubber, strip of 5, for LEL sensor port, GP-01/GX-2001/GX-2009/GX-2012/Gas Tracer/GX-6000
2633-7102RKFilter, charcoal, for CO sensor, pack of 5
2633-7102RK-01Filter, charcoal, for CO sensor, 1 each
2707-6021RKGasket, sensor retainer, 1 each
2833-0172RKSensor Cover, water proof, sheet for 4 sensors, GX-2009, 1 each
2921-1884RKSensor cover, GX-2009 (outside piece)
3010-1104RKScrew for case or sensor retainer, M2 x 10 mm, GX-2001 or GX-2009, 1 each
3113-0112RKWrist strap
3221-1885RKSensor cap assembly, GX-2009 (8 parts)
  • Simultaneous detection of 4 gases
    • LEL, O2, H2S & CO
  • Smallest / Lightest 4 gas monitor on the market
    • 2.7” H x 3” W x 1” D
    • 4.6 oz.
  • Dual audible alarm ports (95 db @ 30 cm)
  • 3 visual alarm LED’s
  • Vibration alarm
  • IP-67 water-resistant/dustproof design
  • Calibration and bump test lock out or reminder controls
  • Large capacity data logging standard
    • 8 alarm trends
    • Log time range of 10 to 300 hours
    • 100 calibration records stored
  • 20 hours of operation (NiMH batteries)
  • Large LCD display screen
  • Automatic backlighting at alarm
  • Impact resistant over-mold body
  • STEL and TWA readouts
  • Intrinsically safe, CSA, C/US classified IECEx / ATEX approved (optional MSHA version available)
  • 2 year warranty
  • Personal monitoring
  • Confined spaces
  • Refineries/petrochemical
  • Utilities
  • Oil and Gas
  • Water/wastewater
  • Fire services
  • Construction
Gas DetectedCombustible Gases (Methane as standard)Oxygen (O2)Hydrogen Sulfide (H2S)Carbon Monoxide (CO)
Detection PrincipleCatalytic combustionGalvanic cellElectrochemical 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 MethodDiffusion sampling standard / hand aspirator or motorized pump optional
DisplayDigital LCD displays all four gases simultaneously, with auto backlight
Preset Alarms (User Adjustable)
Overscale alarm (Non-adjustable)
1st alarm 10% LELLow alarm 19.5%1st alarm 10 ppm

1st alarm 25 ppm

2nd alarm 50% LELHigh alarm 23.5%2nd alarm 30 ppm2nd alarm 50 ppm
Over alarm 100% LELOver alarm 40.0%TWA alarm 1.0 ppmTWA alarm 25 ppm
STEL alarm 5.0 ppmSTEL alarm 200 ppm
Over alarm 100 ppmOver alarm 500 ppm
Types of AlarmsGas Alarm: 2 Increasing alarms, STEL, TWA, overscale alarm. O2 decreasing/increasing.
Trouble alarm: Sensor disconnection, low battery, circuit error, calibration range error
Display of AlarmGas 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 TimeWithin 30 seconds (T90)
Continuous Operation20 hours after a 3 hour full charge (14 hours after 90 min charge)
Power SourceDirect charging NiMH batteries, set of 2
Safety Design / ApprovalsIECEx 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
Dimension2.7” H x 3” W x 1” D (Approx. 70 H x 75 W x 25 D mm)
Weight4.6 ounces (approx. 130 g)
Case MaterialHigh impact over molded rubber. Dust and water resistant with IP-67 approval.
ControlsTwo buttons: POWER / MODE, AIR
DataloggingStandard 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 AccessoriesBattery charger
Standard AccessoriesAlligator clip13-0116RK
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 AccessoriesBelt Clip13-0117RK
Padded carrying case for GX-2009 and accessories20-0112RK-01
Charging station, 115/220 VAC powered for 2, 3, 4, or 5 instruments49-2170RK-XX
Charging station with 12 VDC power supply and vehicle adapter plug49-2171RK
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
Hand aspirated sample draw with 10’ hose and probe (up to 40’ hose available)81-1160RK
USB to IrDA downloading cable47-5084RK-01
SDM-2009 single calibration station81-SDM2009-01
Configurations4 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
WarrantyTwo years material and workmanship