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.
  • 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
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