GX-3R Pro

GX-3R Pro

The GX-3R Pro is the world’s smallest 5-gas monitor and fits in the palm of your hand. It simultaneously monitors and displays 5 different gases. In addition to monitoring standard confined space gases, LEL, O2, CO, & H2S, the GX-3R Pro has a 5th channel where you can add infrared or toxic sensors. Two of the four sensor slots have interchangeable sensors providing flexible configurations, which can easily be changed in the field.

The GX-3R Pro utilizes Bluetooth® communication to display direct gas readings from the instrument to a phone app (Download Now iOS or Android). Automatic notifications can be programmed to send text or email messages if there is an alarm event from the GX-3R Pro.

Finally, like the Gx-3R, the Pro version also comes with a non-compliance indicator. The instrument flashes it’s 3 LED lights every 30 seconds (adjustable interval) if the instrument has not been bump tested, or if calibration is due, or if there was a gas alarm event. The 3 LED lights will continue to flash once every 30 seconds until the non-compliance condition has been resolved.

Available Accessory: RP-3R Sample Draw Pump

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  • Smallest & lightest 5 gas monitor
  • Simultaneous detection of 5 gases (LEL, O2, H2S, CO, and other optional sensors; H2 Compensated CO sensor available)
  • Simple 2-button operation
  • Bluetooth® communication with iOS & Android App
  • Non-Compliance Indicator
  • 3 user-adjustable alarm levels
  • Panic Alarm (Tap instrument twice)
  • Man Down Alarm
  • Impact-resistant body
  • Large full dot, auto-backlit display with auto-rotation
  • Stealth mode for law enforcement
  • Field replaceable sensors & filters
  • Water and dust resistant design, IP66/68
  • 3 Year Warranty

  • Dimensions: 2.9 W x 2.6 H x 1.06 D inches
  • Weight: 4.58 ounces
  • Alarm Types:
    • Gas alarm: Two increasing alarms, STEL, TWA, and Overscale alarm. O2 decreasing/increasing
    • Trouble: Sensor disconnection, low battery, a circuit error, calibration range error, calibration or bump due alarm
  • Sample Method: Diffusion sampling standard (hand aspirator or clip-on motorized pump optional)
  • Response Time: Within 30 Seconds (T90)
  • Display: Full dot LCD with Auto backlight and Autorotation
  • Audible Alarm: Gas Alarm 100 dB @ 30 cm; Trouble Alarm 95 dB @ 30cm
  • Power Source: Li-ion (16 - 25 hours depending on sensors installed); Alkaline (7 - 16 hours depending on sensors installed)
  • Operating Temperature: -20°C to +50°C (-4°F to +122°F )
  • Relative Humidity: 10 t0 90% RH non-condensing
  • Bluetooth® Communication: BLE with iOS and Andriod phone app: RK Link
  • Datalogging: Logs user ID, Station ID, Calibration/Bump History, Alarm Events, and Alarm Trends
  • Warranty: Three-year material (including sensors) and workmanship

Sensor Type Measuring Range Resolution
Dual H2S/CO H2S: 0 - 200.0 ppm
CO: 0 - 2,000 ppm
H2S: 0.1 ppm
CO: 1 ppm
CO (H2 Compensated) 0 - 2000 ppm 1 ppm
LEL 0 to 100% LEL 1% LEL
O2 0 - 40.0 % Vol. 0.1 %Vol.
SO2 0 - 100.0 ppm 0.05 ppm
CO2 (%) 0 - 10.0 % Vol. 0.01 %Vol.
CO2 (ppm) 0 - 10,000 ppm 20 ppm