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RKI Instruments GX-2012 Confined Space Multi Gas Monitor, 3 Sensor, LEL/O2/CO Base, Alkaline and Li-Ion Battery Pack with 100-240 VAC Charger - 72-0290-17-B

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RKI Instruments GX-2012 Confined Space Multi Gas Monitor, 3 Sensor, LEL/O2/CO Base, Alkaline and Li-Ion Battery Pack with 100-240 VAC Charger - 72-0290-17-B

RKI Instruments GX-2012 Confined Space Multi Gas Monitor, 3 Sensor, LEL/O2/CO Base, Alkaline and Li-Ion Battery Pack with 100-240 VAC Charger...


72-0290-17-B GX-2012 Confined Space Multi Gas Monitor, 3 Sensor, LEL/O2/CO Base, Alkaline and Li-Ion Battery Pack with 100-240 VAC Charger by RKI Instruments

Built around high-quality micro-sensor technology, the GX-2012 is RKI's smallest personal 5 sensor gas monitor with a built in sample pump. Weighing only 12.3 ounces, the GX-2012 can monitor the standard confined space gases (LEL combustibles, Oxygen content, Carbon Monoxide, and Hydrogen Sulfide). When equipped with an optional sensor, it can also measure 100% volume Methane and dynamically display either % LEL, or % volume with its auto-ranging ability. With this version, the GX-2012 can be used for gas line purge testing as well as standard safety testing, and includes two operating modes: Normal (for confined spaces) and Bar Hole.

The GX-2012's large LCD display shows all gas readings, battery level, current time, and will automatically backlight in alarm conditions. Standard alarm types include vibration, visual, and audible alarms, which can be set to latching or nonlatching. Controlled by a microprocessor, the GX-2012 continuously checks itself for sensor connections, low battery, circuit trouble, low flow, and calibration errors. The GX-2012 can interchangeably operate on either a Li-Ion battery pack or an alkaline battery pack. The batteries are simple to replace requiring no tools to access the removable battery compartment or pack. Calibration and bump test intervals and reminders are user adjustable and can be set to either go into alarm or to lock the user out of normal measurement mode once a calibration period has expired. Calibrations can be performed automatically or individually in single calibration mode. The GX-2012 is also compatible with the economical SDM-2012 single channel calibration station.


  • Monitors LEL, and % volume methane, O2, CO and H2S
  • 0 to 100% volume methane option
  • Auto-ranging display of % LEL and % volume
  • Barhole test mode
  • Bump test reminder option
  • Snap-logging - on demand data recording
  • Status indicators: Pump active, microprocessor status and battery level
  • Internal sample drawing pump with up to 50 foot range
  • Pump pause on demand extends battery life
  • Vibration, visual, and audible alarms
  • Automatic backlight during alarms
  • Calibration reminder with lock out option
  • Lithium ion or alkaline power source (interchangeable)
  • Quick charge
  • Glove friendly large buttons
  • Alarm latching or non-latching
  • High impact protective rubber overmolding
  • Up to 600 hours of datalogging with alarm trends
  • Autocalibration or single calibration
  • TWA and STEL readings with lunch-break mode
  • ntrinsically safe, ATEX/IECEX/CE, c CSA us (pending)
  • High dust and water resistance design
  • 2 year warranty


  • Personal monitoring
  • Confined space entry
  • Refineries / petrochemical
  • 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
Combustible Gases (Methane as Standard)
% Volume Methane
Oxygen (O2)
Hydrogen Sulfide (H2S)
Carbon Monoxide (CO)
Detection Principle
Catalytic combustion
Thermal conductivity
Galvanic cell
Electrochemical cell
Detection Range
0 ~ 100% LEL
0 ~ 100% Vol
0 ~ 40% Vol.
0 ~ 100 ppm
0 ~ 500 ppm
Accuracy Statement (whichever is greater)
± 5% of reading or ± 2% LEL  
± 5% of reading or ± 2% of full scale
± 5% O2
± 5% of reading or 2% ppm H2S
± 5% of reading or ± 5 ppm CO
Sampling Method
Internal sample pump, flow rate nominal 0.5 LPM, includes hydrophobic filter
Digital LCD with 7 segments, auto backlight during alarm
Preset Alarms (User Adjustable)
1st alarm 10% LEL
2nd alarm 50% LEL
Over alarm 100% LEL
No alarms for % Vol. CH4
Low alarm 19.5%
High alarm 23.5%
Over alarm 40.0%
1st 5ppm
2nd 30 ppm
TWA 10 ppm
STEL 15 ppm
Over 100 ppm
1st 25 ppm
2nd 50 ppm
TWA 25 ppm
STEL 200 ppm
Over 500 ppm
Alarms Types
Gas alarms: 1st and 2nd, STEL, TWA (user adjustable) and OVER
Trouble alarms: Sensor connection, low battery, low flow, circuit trouble and calibration error
Alarm Methods
Gas alarms: Flashing lights, two tone buzzer, and vibration
Trouble alarms: Flashing lights, trouble displayed, intermittent buzzer and vibration
Operating Temp. & Humidity
- 20°C to + 50°C (- 4°F to 122°F)
0 to 95 % RH, non-condensing
Response Time
Within 30 seconds (T90)
Continuous Operation
Alkaline battery: 15 hours
Li-Iion battery: 10 hours
70°F (21°C)
Power Source
Li-Ion battery pack, 3 "AA" Alkanine battery pack; interchangeable
Safety Rating
c CSA us classified (pending), as intrinsically safe. Class I, Division 1, Groups A, B, C, D
Dimension & Weight
Approx. 143 (H) x 71 (W) x 43 (D) mm (5.6" H x 2.8" W x 1.6" D), approx. 350 g (12.3 ounces)
Case Material
High dust & water resistant design. RFI shielded high impact plastic with protective rubber overmolding
Standard Accessories
Belt clip
Rubber nozzle, 2.5"
Datalogging software
10" Probe
Quick reference card
10' Hose
Training CD
Optional Accessories
SDM-2012 calibration stations
Calibration kit
Li-Ion battery pack
AC or DC Charger
Sample draw hoses (10' standard, up to 50' max. available)
Carrying case
1, 2, 3, 4, or 5 sensor units
Li-Ion or alkaline battery pack options
Two years material and workmanship

Questions & Answers