No.

QRAE II Gas Monitor

Gas Detectors
QRAE II Gas Monitor
Out of stock

The QRAE II is a full-featured, compact, one- to four-sensor gas detector for oxygen, combustibles, hydrogen sulfide, or carbon monoxide. Key features include easy-to-change battery pack, a water-resistant case and a new state-of-the-art O2 sensor.

Product Price includes Vat

Key Features
  • Full-featured compact Gas Detector
  • Suitable for most Confined Spaces: Dioxide, Oxygen, and Combustibles.
  • Simple and intuitive to operate with a two button operation,
  • Protected from water ingress through IP65 certification
  • ATEX approved
  • Available in both diffusion or pumped models.
  • This unit is fitted with EMI/RFI Technology meaning that is protected against radio interference.
Additional Advantages
  • One to four sensor configuration: Hydrogen Sulfide, Carbon Monoxide or Sulfur
  • Easy-to-change externally accessed battery packs (available in rechargeable and alkaline versions),
  • State-of-the-art O2 sensor with extended life,
  • Charging cradle doubles up as data transfer connection for Data logging,
  • Display can flip 180 degree with a push of a single button for easy viewing from your belt or lapel.

Detector Specifications*


Diffusion: 5" L x 2.8" W x 1.5" H (12.5cm x 7.2cm x 3.8cm)
Pump: 5" L x 2.8" W x 2" H (12.5cm x 7.2cm x 5.0cm)


Diffusion: 9 oz (250 g)
Pump: 12 oz (350 g)


  • Catalytic bead for combustibles
  • Oxygen: SPE O2™ (non-consumable Solid Polymer Electrolyte technology)
  • Toxic: electrochemical, H2S, CO or SO2


Interchangeable Lithium-ion and alkaline battery packs

Operating Period

Diffusion: Up to 14 hours continuous operation with
Lithium-ion battery, up to 10 hours with alkaline battery
(typical, without alarm)
Pump: Up to 10 hours with Lithium-ion battery, up to 8 hours
with alkaline battery

Display Graphic

4 lines, with LED automatic back light in dim light or alarm condition


Two-key operation

Direct Readout

  • Instant reading of up to four sensors
  • Oxygen as percentage by volume
  • Combustible gas as percentage of lower explosive limit (LEL), scaleable using correction factors
  • Toxic gases as parts per million
  • High and low values for all gases
  • Battery and shutdown voltage
  • Date, time, elapsed time, temperature


  • 95dB buzzer (at 30 cm) and flashing red LED
  • High: 3 beeps, vibration and flashes per second
  • Low: 2 beeps, vibration and flashes per second
  • STEL and TWA: 1 beep, vibration and flash per second
  • Alarms: latching with manual override or automatic reset
  • Additional diagnostic alarm and display message for low battery


Highly resistant to EMI/RFI. Compliant with EMC directive 2004/108/EC additional +60 volts/meter

IP Rating



Standard 12 days at one-minute intervals


Two-point calibration for zero and span

Sampling Pump

Optional, internal pump 300 cc/mn

Hazardous Area Approval

  • US and Canada: CI, D1, Groups A, B, C, D, T4
  • Europe: ATEX II 2G EEx ia d IIc T4
  • IECEX: Ex ia d II C T4


-4° to 113° F (-20° to 50° C) for T4 temperature code


0% to 95% relative humidity (non-condensing)


Stainless-steel alligator clip


Full 2-year warranty, including all sensors

*Specifications are subject to change


Default Sensor Specifications*

Gas Monitor




0 to 30.0%



0 to 100% LEL

1% LEL

Carbon Monoxide

0 to 1000 ppm

1 ppm

Hydrogen Sulfide

0 to 100 ppm
0 to 1000 ppm

0.1 ppm
1 ppm

Sulfur Dioxide

0.1 to 100 ppm

0.1 ppm


Ordering Options
QRAE II Monitor Includes:
  • Monitor as specified
  • Sensors as specified
  • Calibration adapter and internal filters (diffusion only)
  • Quick reference guide
  • User manual and ProRAE Studio Software Package for Windows® 2000, NT and XP on CD-ROM
  • Alkaline adapter
  • Water trap filter (pump only)
  • Rechargeable versions additionally offer:
    • Charging/download cradle with computer interface cable
    • Universal adapter
    • Lithium-ion battery pack
Confined Space Entry Kit for Pump and Diffusion Models (CSK1) (CSK2)
  • Hard transport case with pre-cut foam
  • 6' (2 m) Tygon® tubing
  • 10" (25cm) stiff aluminum sample probe with replaceable filter
  • Constant-flow hand pump
  • Tool Kit
  • Three water trap filters
  • CSK2 versions additionally offer:
    • Four-gas mix in a 34L cylinder (50% LEL, 18% O2, 10 ppm H2S, 50 ppm CO)
    • Calibration regulator and tubing
Quick enquiry
If you have any questions feel free to ask us
For any further info call us on +353 (0) 1 401 9600
Or feel free to E-mail us