RAE Systems introduces the QRAE 3, one-to four-gas monitor in pumped or diffusion models. The QRAE 3 senors include Oxygen (O2), combustibles and toxic gases options of Hydrogen Sulfide (H2S), Carbon Monodixe (CO), Sulfur Dioxide (SO2), and Hydrogen Cyanide (HCN) for responders and workers subject to hazardous environments.

The QRAE 3 has wireless capability which enables access to instrument readings in real time. The QRAE 3 also includes Man Down alarm. Real time readings allow for faster response and better worker visibility. The ProRAE Guardian Safety System and the EchoView Host Mini-Controller Closed-Loop wireless systems can also communicate real time hazard readings for safety-enhancing wireless monitoring.

  • Easy maintenance with field-replaceable sensors and pump
  • Fully automated bump testing and calibration with AutoRAE 2
  • Pumped or Diffusion model option
  • Large graphic display can rotate 180°
  • Available in Diffusion or Pumped version
  • IP-65/67 water- and dust-resistant case
  • Strong, protective, concussion-proof design
  • five-way local and remote wireless alarm notification
  • Large graphical display icon-driven user interface


Size 140mmHx 82mmW x 42mmW
Weight Diffusion: 365g with Li-ion battery and clip
Pumped: 410g with Li-ion battery, clip and filter

up to four field-replacement sensors:

  • LEL: catalytic bead for combustibles (built-in correction factor library
  • Oxygen: Liquid electrolyte O2
  • Toxic: electrochemical for H2S, CO, SO2, HCN
Battery Rechargeable Li-Ion
Running Time
  • 14 hours continuous non-wireless, diffusion
  • 11 hours continuous non-wireless, pumped
  • 10 hours continuous with wireless, diffusion
  • 8 hours continuous with wireless, pumped
  • Note: all battery specifications at 20oC; lower temperatures and alarm conditions will affect runtime
Direct Readout
  • Real time reading of gas concentrations
  • battery status
  • pump status (if equipped with pump)
  • wireless on/off and wireless reception quality
  • STEL, TWA, peak and minimum values
  • Man Down and policy enforcement indicators
  • Continuous datalogging (3 months for 3 sensors at 1-minute intervals, 24/7)
  • User-configurable datalogging intervals (from 1 to 3,600 seconds)
Wireless Network
  • EchoView Host: LOS>200m
  • ProRAE Guardian & RAEMesh Reader:
  • ProRAE Guardian & RAELink3 Mesh: LOS>10m
  • (Receiving >80%)
IP Rating:
  • Pumped: IP-65
  • Diffusion IP-67
Hazardous Area Approvals
  • IECEx/ATEX (II 1G ia IIC T4)
  • USA and Canada: classified for us in Class2, Division 1, Groups A,B,C and D




Confined Space entry and general safety and compliance in:

  • Oil and gas
  • Industrial safety
  • fireground "Toxic Twins" detection
  • Fire and Emergency Response
  • Environmental

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