GX-2012 Portable Gas Monitor, Bar Hole Mode by RKI Instruments


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Multi Gas, Leak Check, Bar Hole Gas Detector


  • Monitors ppm LEL, % volume methane, O2, CO and H2S
  • 0 to 100% volume methane option
  • Auto-ranging display of % LEL and % volume
  • 3 Operating modes: Normal, leak check, & bar hole
  • PPM leak detector
  • Adjustable display ranges
  • Visual / audible pulses change with gas concentration
  • CO display in leak check mode
  • Bar hole test mode for underground leak checks
  • Internal sample drawing pump with up to 100 feet range
  • Vibration, visual, and audible alarms
  • Automatic backlight during alarms
  • Lithium ion or alkaline battery packs (interchangeable)
  • Intrinsically safe, ATEX/IECEx/CE or CSA/CE (Optional)
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With the GX-2012, you have multiple tools in one instrument. Having 3 operating modes, the GX-2012 can be used for confined space, safety monitoring in it’s Normal Operating mode; for leak investigation in Leak Check mode; and for underground leak checking in Bar Hole mode. When equipped with an optional TC sensor, the GX-2012 can measure 100% volume methane and dynamically auto range from % LEL to % volume. This is ideal for line purge testing.

Built around high-quality micro-sensor technology, the GX-2012 is RKI’s smallest personal 1-5 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).

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 non-latching. 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.


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


Gas Detected Combustible Gases
(Methane as standard)
% Volume
Oxygen (O2) Hydrogen Sulfide (H2S) Carbon Monoxide (CO)
Detection Principle Catalytic combustion Thermal conductivity Galvanic cell Electrochemical cell
Detection Range 0 ~ 100% LEL
0 ~ 500 / 1,000 / 2,000 / 5,000 ppm
0 ~ 100% Vol. 0 ~ 40% Vol. 0 ~ 100 ppm
(optional 0-500 ppm)
0 ~ 500 ppm
Accuracy Statement
(whichever is greater)
± 5% of reading or
± 2% LEL(LEL mode only)
± 5% of reading or ± 2% of full scale ± 0.5% 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
Display 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 5 ppm
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-Ion battery: 10 hours
70°F (21°C)
Power Source Li-Ion battery pack, or 3 “AA” Alkaline battery pack; interchangeable
Safety Rating ATEX, TIIS, IECEx, CE, CSA classified (as standard), as intrinsically safe. Class I, Division 1, Groups A, B, C, D (optional version available)
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
Controls Five buttons: POWER / ENTER, DISPLAY, AIR, RESET, SHIFT
Standard Accessories
  • •Belt clip
  • Rubber nozzle, 3.5”
  • Datalogging software
  • 10” Probe
  • Manual
  • 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 100’ max. available)
  • Carrying case
Configurations 1, 2, 3, 4, or 5 sensor units
Li-Ion or alkaline battery pack options
Warranty Two years material and workmanship


GX-2012 Spare Parts

Part # Description
1. 17-1001RK Tapered rubber inlet nozzle, 4”, RP-6 / GX-2003 / GX-2012 / Gas Tracer
2. 21-1833RK Filter holder, clear plastic, GX-2003
3. 33-1031RK Cotton balls, filters for probe, bag of 25
4. 33-0159RK Teflon filter disc, 10 pieces, RP-6 / GX-2003
5. 33-1112RK Wire mesh disk filter, RP-6 / GX-2003 / GX-2012, 10 pack
6. 21-1890RK Top cover assembly, GX-2012 / Gas Tracer
7. 30-0022RK Pump replacement for GX-2012 and RP-2009, with cable and connector
8. 21-1889RK Main case assembly, GX-2012
9. 07-6024RK Battery pack gasket, GX-2012 / Gas Tracer
10. 07-6025RK Main case gasket, GX-2012 / Gas Tracer
11. 51-1125RK LCD display, GX-2012 / Gas Tracer
12. 57-2043RK CPU PC board assembly, GX-2012
13. 49-1406RK Battery, lithium, CR 1220, for main PCB, GX-2012 / Gas Tracer
14. 30-1053RK Vibration motor, GX-2003 / GX-2012 / Gas Tracer
15. 10-1090RK Tap tight screw M2x4.5 mm, phillips self-tapping
16. 57-2041RK Sensor PC board assembly, GX-2012
17. 07-6026RK Sensor gasket, GX-2012 / Gas Tracer
18. 33-7114RK Filter disk, H2S scrubber, 5 pack, for combustible diffusion port
19. 33-7102RK Filter, charcoal, for CO sensor, pack of 5 GX-2009 / GX-2012 / Gas Tracer / GX-2001
20. 21-1892RK Sensor cap assembly, GX-2012
21. 13-0118RK Belt clip, GX-2012 / Gas Tracer
22. 49-1615RK Batter pack, lithium ion, GX-2012 / Gas Tracer
23. 49-1616RK-01 Alkaline Battery pack cover with gasket, GX-2012 / Gas Tracer
24. 49-1616RK-02 Alkaline Battery pack without cover with gasket, GX-2012 / Gas Tracer
25. 13-0112RK Wrist strap
26. 10-1108RK Screw M2 x 16
27. 10-1093RK Screw M2 x 6 SUS304
28. 10-1091RK Screw M2 x 5 SUS
29. 10-1092RK Truss screw M2 x 5
30. OS-BM2 O2 sensor OS-BM2
31. NC-6264A
NC-6264B (CSA version)
LEL sensor (non CSA)
LEL sensor for GX-2012 CSA
32. ES-1821 CO sensor ES-1821
33. ES-1827I H2S sensor ES-1827I
34. TE-7561 VOL sensor TE-7561
35. SH-8641 PPM sensor SH-8641, Gas Tracer
36. 49-1616RK Alkaline Battery pack without batteries with gasket, GX-2012 / Gas Tracer


Training Video

This video is also available on YouTube and CD (by request)

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