RKI Instruments

RKI GX-2012 Purge Testing Instrument

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RKI GX-2012 Purge Testing Instrument is an application that requires a special configuration of the GX-2012 and the addition of the “T” fitting adapter. It essentially adds a second combustible sensor that extends the detectable range of CH4 up to 100% Vol. (the LEL sensor is only up to 5% Vol or 100% LEL). A standard 4-gas confined space instrument will not adequately test for safe conditions during this process, as the high gas level will overwhelm or damage an LEL sensor, and the sensor will not function in an oxygen-depleted (inert) atmosphere. All measurements are taken at stand pipe or diffuser with service valve cracked.

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

Key Features:

  • LEL, % volume CH4, O2, H2S and CO gas sensors
  • Percentage by volume methane detection can be added
  • 50 ft. range for internal active sampling pump
  • Three standard alarms include vibration, visual, and audible alarm modes
  • TWA and STEL exposure alarms along with lunch-break mode
  • Lightweight at only 12.3 ounces
  • Auto-calibration
  • Circuit checking and calibration reminder complete with lockout option
  • Rapid charging to full in under 90 minutes
  • Large, glove friendly buttons
  • Protective rubber housing and IP-67 water and dust protection
  • Up to 600 hours of data logging with alarm trends
  • Intrinsically safe
  • Meets OSHA standards
  • Meets Class I, Division 1, Groups A, B, C, D: TIIS, IECEx, ATEX, CE


  • Monitor
  • 10 ft. sample hose
  • Probe
  • Chosen battery option
  • "T" fitting adapter

Remember to calibrate every six months and regularly perform bump tests.

Optional Accessory: Downloading cable, USB / IrDA adapter

Purge/Test Procedure with GX-2012:

Specification Sheet:

GX-2012 Quick Reference Guide:

GX-2012 Manual:

Part Numbers:
72-0290-27- - GX-2012 5-Gas Monitor (specify battery option)
17-4430RK-01 - Bypass Tee Probe with GX-7 Quick Disconnect

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Additional Information

Gas Type:
LEL/% vol. CH4/O2/H2S/CO
bundle|Multi-Gas Monitor|required:
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