The GX-2012 sensor detects the four standard confined space gasses (O, CO, H2S, and LEL) and displays them as a percentage on the visual display. Gasses are continuously monitored with the built-in sample pump. The GX-2012 is the smallest multi-gas sensor with a sample pump.
The GX-2012 has three main operating modes that fit a variety of uses:

  • Confined space safety monitoring
  • Leak investigation
  • Underground leak checking

General Specifications

Gas DetectedCombustible Gases (Methane as standard)% Volume MethaneOxygen (O2)Hydrogen Sulfide (H2S)Carbon Monoxide (CO)
Detection PrincipleCatalytic combustionThermal conductivityGalvanic cellElectrochemical cellElectrochemical cell
Detection Range0 ~ 100% LEL 0 ~ 500 / 1,000 / 2,000 / 5,000 ppm0 ~ 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
Preset Alarms (User Adjustable)1st alarm 10% LEL 2nd alarm 50% LEL Over alarm 100% LELNo alarms for % Vol. CH4Low 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 ppm1st 25 ppm 2nd 50 ppm TWA 25 ppm STEL 200 ppm Over 500 ppm
Alarms TypesGas alarms: 1st and 2nd, STEL, TWA (user adjustable) and OVER Trouble alarms: Sensor connection, low battery, low flow, circuit trouble and calibration error
Alarm MethodsGas alarms: Flashing lights, two tone buzzer, and vibration Trouble alarms: Flashing lights, trouble displayed, intermittent buzzer, and vibration
Sampling MethodInternal sample pump, flow rate nominal 0.5 LPM, includes hydrophobic filter
DisplayDigital LCD with 7 segments, auto backlight during alarm
Operating Temp. & Humidity-20°C to +50°C (-4°F to 122°F) 0 to 95% RH, non-condensing
Response TimeWithin 30 seconds (T90)
Continuous OperationAlkaline battery: 15 hours Li-Ion battery: 10 hours 70°F (21°C)
Power SourceLi-Ion battery pack, or 3 “AA” Alkaline battery pack; interchangeable
Safety RatingATEX, TIIS, IECEx, CE, CSA classified (as standard), as intrinsically safe. Class I, Division 1, Groups A, B, C, D (optional version available)
Dimension & WeightApprox. 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 MaterialHigh dust & water resistant design. RFI shielded high impact plastic with protective rubber overmolding
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, • Carrying case up to 100’ max. available)
Configurations1, 2, 3, 4, or 5 sensor units Li-Ion or alkaline battery pack options
WarrantyTwo years material and workmanship

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