GX-3R Personal 4-Gas Monitor for O2/LEL/CO/H2S

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Item #: 72-RA-C
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$562.84 Was: $595.00
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Product Details

GX-3R Personal 4-Gas Monitor for O2/LEL/CO/H2S

The GX-3R is a durable 4-gas monitor that only weighs 3.52 ounces. With dimensions of 2.2” W x 2.55” H x 1.02” D, the gas detector can be comfortably clipped within a worker's breathing zone. It simultaneously monitors and displays combustibles (LEL), O2, CO (Hydrogen compensated CO also available), and H2S.

The GX-3R contains RKI's newest generation of micro sensors. The LEL sensor has a unique design with two active filaments in one sensor to increase its resistance to silicone poisoning. If one filament gets poisoned the second filament takes over. The lead-free O2 electrochemical sensor has an impressive 3 to 5 year life span. The combined CO and H2S sensor allows the gas detector to measure 4 gases with only 3 sensors.

The instrument is compatible with the RK-3R sample pump for confined space work and the SDM-3R bump test and calibration station.


  • Smallest & lightest 4 gas monitor (2.2" W x 2.55" H x 1.02" D, 3.52 ounces)
  • Simultaneous detection of 4 gases LEL, O2, H2S, and CO
  • Simple 2-button operation
  • Non-Compliance Indicator that flashes every 30 seconds (adjustable) when the detector has not been calibrated, bump tested, or if there's a gas alarm event.
  • Audible, visual, & vibration alarms with user-adjustable alarm levels
  • Datalogging
  • Impact resistant body with removable rubber boot
  • Large LCD Auto-backlit display
  • Li-Ion rechargeable battery with up to 25 hours of operation
  • Field replaceable sensors & filters
  • Water and dust resistant design, IP66/68
  • Stealth mode for law enforcement
  • Optional RP-3R sample pump
  • 3 Year warranty

GX-3R Personal 4-Gas Monitor for O2/LEL/CO/H2S

Sampling Method Diffusion sampling standard (hand aspirator or clip-on motorized pump optional)
Display Full dot LCD with Autobacklight and Autorotation
Alarm Types Gas Alarm: STEL, TWA, Overscale, O2 decreasing / increasing, Man Down, Panic

Trouble Alarm: Sensor disconnection, low battery, circuit error, calibration range error, cal or bump due alarm
Gas Alarm Display

Display Alarm:

  • Flashing LED’s
  • Continuous buzzer (100 db @ 30cm)
  • Flashing gas value
  • Vibration
Trouble Alarm:
  • Flashing LED's
  • Intermittent buzzer (95 db @ 30cm)
  • Display of error message
Operating Temp. & Humidity -20°C ~ +50°C [ -4°F ~ +122°F ] 10 to 90% RH, non-condensing (continuous environment)

-40°C ~ +60°C [ -40°F ~ +140°F ] 0 to 95% RH, non-condensing (temporary environment)
Response Time Within 30 seconds (T90)
Run Time 25 hours Li-Ion, 16 hours Alkaline
Dimension & Weight 2.4” W x 2.63” H x 1.06” D (Approx. 61 W x 67 H x 27 D mm), 3.70 ounces (approx. 105 g) with rubber boot
Case Material Explosion proof, dust and water resistant to IP-66/68 (2m,1h) approval. Drop height 23 ft
Bluetooth Communication BLE: with iOS and Android phone app: RK Link
Datalogging Logs user ID, station ID, Calibration & Bump Test history, Alarm Events & Alarm Trends
Standard Accessories Alligator clip, protective rubber boot, charger, calibration adapter
Optional Accessories
  • Padded carrying case
  • RP-3R Attachable sampling Pump with 4” rubber nipple, 10’ hose and probe (up to 40’ hose available)
  • USB to IrDA downloading cable for datalogger
  • SDM-3R calibration station
  • Hand aspirator
Safety Design / Approvals ATEX, CSA (Pending)
Warranty Three years material and workmanship including sensors

GX-3R Personal 4-Gas Monitor for O2/LEL/CO/H2S

GX-3R Personal 4-Gas Monitor for O2/LEL/CO/H2S

There are no reviews yet.