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RKI Instruments GX-2001 Personal Four Gas Monitor, 2 Gas, O2/H2S with Belt Clip, No Charger - 72-0224RK

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RKI Instruments GX-2001 Personal Four Gas Monitor, 2 Gas, O2/H2S with Belt Clip, No Charger - 72-0224RK

RKI Instruments GX-2001 Personal Four Gas Monitor, 2 Gas, O2/H2S with Belt Clip, No Charger - 72-0224RK



72-0224RK GX-2001 Personal Four Gas Monitor, 2 Gas, O2/H2S with Belt Clip, No Charger by RKI Instruments

RKI is proud to offer the smallest 4-gas monitor in the world, the GX-2001. Weighing only 6 ounces and about the size of a pager (2.8" H x 2.2" W x 1.1" D), the GX-2001 simultaneously monitors combustibles, oxygen, carbon monoxide, and hydrogen sulfide. The GX-2001 is armed with standard features like a vibration alarm, autocalibration, datalogging, rechargeable Ni-MH battery pack, STEL / TWA readings, peak hold and auto backlighting at alarm on a large LCD display, and it even tells the time! All of these controls and features are operated through 3 simple glow in the dark buttons. Utilizing either the standard charger or datalogging / charger station, the Ni-MH battery pack will operate for 18 hours and fully recharge in 90 minutes. Also available is the datalogging software program which is Windows 95, 98, ME, and XP compatible. The GX-2001 is also compatible with the Data Cal 2000 instrument maintenance system and SM-2001U calibration station.

The GX-2001 is designed around the world's smallest gas 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.


  • Simultaneous detection of 4 gases LEL, O2, H2S and CO
  • Smallest 4 gas monitor on the market 2.8" H x 2.2" W x 1.1" D, 6 oz.
  • Audible, visual, & vibration alarms
  • Alarm trend data
  • Datalogging standard
  • Autocalibration
  • Rechargeable Ni-MH battery pack
  • Battery pack recharges in 90 minutes
  • Continuously operates for up to 18 hours
  • Large LCD display screen
  • Automatic backlighting at alarm
  • High impact, RFI shielded body
  • STEL and TWA readouts (USA Version)
  • Continuously displays current time
  • Intrinsically safe, CSA, C / US
  • 2 year warranty


  • Personal monitoring
  • Confined spaces
  • Refineries / petrochemical
  • Utilities
  • Chemical plants
  • Hazardous material
  • Water / wastewater treatment
  • Fire services
  • Mining

*Please note we can only ship RKI products to customers within the United States

Gas Detected All 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)
Sampling Method Diffusion sampling, standard hand aspirator or motorized pump optional
Display Digital LCD with 7 segments, auto backlight at alarm display automatically cycles every 3 seconds reading each gas, immediate reading for alarm condition.
Preset Alarms * (User 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 10 ppm
2nd alarm 30.0 ppm
TWA alarm 10 ppm
STEL alarm 15 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
Trouble alarm: Sensor disconnection, wire disconnection, low battery, circuit error, calibration range error
Display of Alarm Gas Alarm: Flashing LEDs, intermittent buzzer, flashing gas value, vibration
Trouble alarm: Flashing LEDs, intermittent buzzer, display of error message
Special Functions Manual back light LCD (Automatic at alarm)
Datalogging (40 hours)
Alarm trend
Peak hold
Direct charging in just 90 minutes
Continuous display of current time
Operating Temp. & Humidity 14 to 104°F (-20° C ~ + 40°C), 0 to 85% RH, non-condensing (splash resistant)
Response Time Within 30 seconds (T90)
Continuous Operation Up to 18 hours
Power Source Direct charging NiMH battery pack, charges in just 90 minutes
Safety Design / Approvals CSA classified, "C / US", as Intrinsically Safe. Exia. Class I, Groups A, B, C, & D
Class I, Zone 0, Group IIC. Temperature Code T3C
Dimension & Weight 2.8" H x 2.2"W x 1.1"D (Approx. 72 (H) x 56 (W) x 27 (D) mm) , 6 ounces (approx. 140g)
Case Material Dust & weather resistant. RFI shielded high impact plastic and stainless steel
Controls Three glow in the dark buttons: POWER / MODE, DISP, AIR
Required Accessories Battery charger (basic charger or datalogging charger)
Standard Accessories Wrist strap - 3-0112RK
Belt clip (hard hat clip also available) - 13-0202RK
Ni-MH battery pack - 49-1605RK
Optional Accessories Neck strap (Wrist strap is standard) - 13-0113RK
Padded carrying case for GX-2001 and accessories - 20-0112RK-01
Protective rubber boot - 20-0315RK
Charger, 12 VDC, with cigarette lighter plug - 49-2157RK
Charger, 12VDC & 115 VAC dual input - 49-2162RK
Basic charger station, 115 VAC powered - 49-2163RK-01
Datalogging / Charger station (IR) with cable and software for datalogging (Windows 95, 98, ME, XP, Vista, & NT) - 49-2156RK-01
RP-6 sample drawing pump with hose and probe - 81-1166RK
Hand aspirated sample draw with hose and probe - 81-1160RK
GX-2001 docking module - 81-DM2001
SM-2001U calibration station - 81-SM2001U
Data Cal 2000 calibration station - 81-DC2000-02
Configurations 4 gas, LEL/O2/H2S/CO
2 gas, LEL/O2
2 gas, LEL/CO
3 gas, LEL/O2/H2S
2 gas, O2/H2S
2 gas, LEL/H2S
3 gas, LEL/O2/CO
2 gas, O2/CO
1 gas, LEL
Warranty Two years material and workmanship

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