Starting at $1,080.00
Due to restrictions on hazardous shipping, a $48 hazardous materials fee will be added to your shipping costs & shipping may take longer.
  • Usually ships in 3-4 weeks



  • Up to 4 gases simultaneously
    • LEL, O2, H2S & CO
  • Simple 2-button operation
  • Non-compliance indicator
  • Alarms: audible, visual, & vibration
  • 3 user adjustable alarm levels
  • Impact resistant body with removable rubber boot
  • Large LCD Auto-backlit display

What's in the Box

  • GX-3R for LEL/O2/CO/H2S
  • 100-240 VAC charger
  • tubing
  • screwdriver
  • carrying case


The RKI Instruments GX-3R Gas Detector is the worlds smallest 4 gas monitor weighing only 3.52 ounces and can comfortably be clipped within a worker's breathing zone (2.2" W x 2.55" H x 1.02" D). It simultaneously monitors and displays LEL combustibles, O2, CO, and H2S. The kit contains a GX-3R for LEL/O2/CO/H2S, 100-240 VAC charger, tubing, screwdriver and carrying case. You can choose the options of including 34AL cylinder CH4/O2/H2S/CO with a 0.25 LPM regulator and/or a RP-3R with a 10ft hose & probe.