QRae 3 Wireless 4 gas detector

The QRae 3 is a durable and versatile diffusion or pumped one to four gas monitor for detection of combustibles, oxygen, hydrogen sulfide, carbon monoxide, sulfur dioxide, hydrogen cyanide and now ammonia and phosgene. New sensors now available including ammonia, chlorine and nitrogen dioxide.

Standard features include easy to change battery packs, easy access to sensors, internal vibrating alarm, loud 95bD audible alarm, and a water resistant IP-65 case. The rechargeable Lithium-ion battery delivers up to 14 hours of continuous operation in non-wireless diffusion mode. QRae 3 combustible gas detector can deliver wireless real time instrument readings and alarm status 24/7. This provides better incident visibility and can improve response time.

The QRAE 3’s wireless communications capability enables access to real-time instrument readings and alarm status (including Man Down alarm) from any location for better visibility and faster response. Real-time hazard readings can also be communicated to the ProRAE Guardian Safety System and the EchoView Host Mini-Controller Closed-Loop Wireless System for safety-enhancing wireless monitoring.

The wireless QRAE 3 portable gas detector provides safety officers and commanders real-time remote access to the readings and alarm status of workers and responders. Safety officers who are outside the immediate incident area can have the same real-time situational awareness as those in the “hot zone.” This can help facilitate faster, data-driven decision making to alert responders, save lives and protect assets.


  • Man Down Alarm with real time remote wireless notification
  • Easy maintenance with field replaceable sensors and pump
  • Fully automated bump testing and calibration with AutoRae 2
  • Pumped or diffusion models available
  • Large graphic display can rotate 180°
  • IP-65/67 water and dust resistant case
  • Strong, protective, concussion proof design
  • Real time gas concentration readings and alarm status enabled by state of the art wireless technology
  • Unmistakable five way local and remote wireless notification of alarm conditions
  • Large graphical display icon driven user interface through intuitive, simple to operate two button user interface
  • Multi language support
  • Easy access to pump, sensors, filter and battery compartment


  • Confined space entry
  • Industrial safety
  • Oil and gas
  • Fireground “Toxic Twins” detection
  • Environmental
  • Fire and emergency response
  • Telecommunications
  • Pharmaceutical

Instrument Specifications

DetectorLEL: Catalytic bead, built in correction factor library
Oxygen: Liquid electrolyte
Toxic: Electrochemical CO, H2S, NH3, Cl2, NO2, SO2, HCN, NH3, PH3
BatteryRechargeable Lithium-ion
Operating PeriodsDiffusion, Non-Wireless: Up to 14 hours
Pumped, Non-Wireless: Up to 11 hours
Diffusion, Wireless: Up to 10 hours
Pumped, Wireless: Up to 8 hours
Note: All battery specifications at 68°F, lower temperatures and alarm conditions will affect runtime
Graphic DisplayMonochrome graphic display (128×80)
Display Size: 1.57″ x 1/06″ with backlighting
Automatic or on-demand screen rotation
KeypadTwo button operation
Direct ReadoutReal time reading of gas concentrations
Battery status
Pump status, if equipped
Wireless on/off and wireless reception quality
STEL, TWA, peak and minimum values
Man Down and policy enforcement indicators
AlarmMulti tone 95 dB buzzer, vibration alarm and flashing red LEDs and on-screen indication of alarm conditions
Alarms: Latching, non latching or manual override
Additional diagnostic alarm and display message for low battery
Pump stall alarm, pump version only
Man Down Alarm with pre-alarm and real time remote wireless notification
EMI/RFIEMI & ESD Test: 100 MHz to 1 gHz 30V/m, no alarm
Contact: ±4kV
Air: ±8kV, no alarm
IP RatingPumped: IP-65
Diffusion: IP-67
Data LoggingContinuous datalogging, 3 months for 4 sensors at 1 minute intervals
User configurable datalogging intervals, from1 to 3,600 seconds
Communication & Data DownloadData download and instrument set up and upgrades on PC via travel charger
Wireless data and status transmission via built in RF modem, optional
Wireless NetworkMesh Rae Systems Dedicated Wireless Network
ISM license free bands, 868MHz or 90MHz
Wireless RangeEchoView Host: LOS > 650 feet
ProRae Guardian & Mesh Reader: LOS > 650 feet
ProRae Guardian & RaeLink3: LOS > 330 feet
EM ImmunityEMI & ESD Test: 100MHz to 1GHz 30V/m, no alarm
Contact: ±4kV
Air: ±8kV, no alarm
IP RatingPumped: IP-65
Diffusion: IP-67
CalibrationTwo point calibration for zero and span (manual or automatic with AutoRae 2)
Sampling PumpBuilt in pump or diffusion
Can sample through tubing up to 98 feet
Temperature-4 to 122°F
Humidity0 to 95% rH, non condensing
SizeDiffusion: 5.5″ L x 3.2″ W x 1.5″ H
Pumped: 5.7″ L x 3.2″ W x 1.7″ H
WeightDiffusion: 12.9 ounces
Pumped: 14.5 ounces
ApprovalsUS & Canada: Class I, Division 1, Groups A, B, C, D
WarrantyUnit: 2 years
O2, CO, H2S Sensors: 3 years
All Other Toxics: 1 year


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