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, sulfure dioxide and hydrogen cyanide and other gases. Standard features include easy-to-change battery packs, easy access to sensors, internal vibrating alarm, loud 95dB audible alarm, and a water-resistant IP-65 case design. The rechargeable Lithium-ion battery delivers up to 14 hours of continuous operation in non-wireless diffusion mode.


Versatile Compact wireless monitor for up to four gases

QRAE 3 is a versatile, rugged, one- to four-sensor pumped or diffusion gas monitor that provides continuous exposure monitoring of oxygen (O2), combustibles, and toxic gases, including hydrogen sulfide (H2S), carbon monoxide (CO), sulfur dioxide (SO2) and hydrogen cyanide (HCN) for workers and responders in hazardous environments.

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.

  • Real-time gas detector readings and alarm status enabled by state of the art wireless technology

  • Unmistakable five-way local and remote wireless notification of alarm conditions

  • Intuitive simple-to-operate two-button user interface

  • Strong, protective, concussion-proof design

  • IP-65/67 water- and dust-resistant case

  • Easy maintenance with fiel dreplaceable sensors and pump

  • Pumped or diffusion models available

Rugged & Maintainable

  • IP-65/67 water- and dust-resistant case

  • Strong, protective, concussion-proof design

  • Easy access to pump, sensors, filter and battery compartment

Easy to Use

  • Large graphical display icon-driven user interface through intuitive, simple-to-operate two-button user interface.

  • Multi-language support: 18 languages encoded

Safety & Control

  • 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

  • Device Management with Honeywell SafetySuite

Instrument Specifications

Sampling Pump
Built-in pump or diffusion, Can sample through tubing up to 98ft (30m)
-4° to 122° F (-20° to 50° C) for T4 temperature code
Diffusion: 5.5" H x 3.2" W x 1.5" W (140 mm x 82mm x 42mm)
Pumped: 5.7" H x 3.2" W x1.7" D (145mm x 82mm x 42mm)
Diffusion: 12.9 oz (365 g with Li-ion battery and clip)
Pumped: 14.5 oz (410 g with Li-ion battery, clip, and external filter)
Up to four field-replaceable sensors:
LEL: Catalytic bead for combustibles (built-in Correction Factor library)
Oxygen: Liquid electrolyte O2
Toxic: electrochemical for H2S, CO, SO2, HCN
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
Display Graphic
Monochrome graphic display (128 x 80)
Display size: 1.57" W x 1.06" H (40 x 27 mm) with backlighting
Automatic or on-demand screen rotation
Two-button operation
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

Instrument Specifications (Cont'd)

0% to 95% relative humidity (non-condensing)
Multi-tone 95dB buzzer (at 11.8"/30cm, typical), 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 (pumped version only)
Man Down Alarm with pre-alarm and real-time remote wireless notification
Continuous datalogging (3 months for 4 sensors at 1-minute intervals, 24/7)
User-configurable datalogging intervals (from 1 to 3,600 seconds)
Communication & Data Download
Data download and instrument set-up and upgrades on PC via Travel Charger
Wireless data and status transmission via built-in RF modem (optional)
Wireless Network
Mesh RAE Systems Dedicated Wireless Network
Wireless Frequency and Approvals
ISM license free band, 868Mhz or 900Mhz FCC Part15, CE R&TTE, ANATEL
Wireless Range
EchoView Host: LOS > 650 ft (200 m)
ProRAE Guardian and RAEMesh Reader: LOS > 650 ft (200 m)
ProRAE Guardian and RAELink3 Mesh: LOS > 330 ft (100 m)
EM Immunity
EMI and ESD test: 100MHz to 1GHz 30V/m, no alarm
Contact: ±4kV
Air: ±8kV, no alarm
IP Rating
Pumped: IP-65
Diffusion: IP-67
Two-point calibration for zero and span

Sensor Specifications

Oxygen (O2)
Range: 0 to 30.0%
Resolution: 0.1%
Range: 0 to 100% LEL
Resolution: 1% LEL
Carbon Monoxide (CO)
Range: 0 to 500 ppm
Resolution: 1 ppm
Hydrogen Sulfide (H2S)
Range: 0 to 100 ppm
Resolution: 0.1 ppm
Sulfur Dioxide (SO2)
Range: 0 to 20 ppm
Resolution: 0.1 ppm
Hydrogen Cyanide (HCN)
Range: 0 to 50 ppm
Resolution: 0.2 ppm
Ammonia (NH3)
Range: 100 ppm
Resolution: 1 ppm
Phosphine (PH3)
Range: 20 ppm
Resolution: 0.01 ppm
Chlorine (Cl2)
Range: 0 to 50 ppm
Resolution: 0.05 ppm
Nitrogen Dioxide (NO2)
Range: 0 to 50 ppm
Resolution: 0.1 ppm