Environmental Monitoring Equipment & Supplies • Sales, Rental & Service by Enviro-Equipment — Charlotte, North Carolina USA

  • Measures combustible gases (0-100% LEL), oxygen (0-30%), carbon monoxide (0-1000ppm), hydrogen sulfide (0-100ppm).
  • Rechargeable Li-ion battery ~10 hour runtime typical
  • Datalogging capability (64,000 readings, 64 hours for 4 channels at 1-minute intervals)
  • Built-in sampling pump 300 cc/min, can sample through tubing up to 98 ft (30 m) long.
Title Daily Rate Weekly Rate Monthly Rate
RAE Systems QRAE II 2-GAS Rental $60.00 $145.00 $375.00
RAE Systems QRAE II 4-GAS Rental $75.00 $175.00 $475.00

The QRAE 2 is a full-featured, compact, one- to four-sensor gas detector for detection of combustibles, oxygen, hydrogen sulfide, and carbon monoxide.  Key features include easy-to-change, externally accessed battery packs (available in rechargeable and alkaline versions), sensors and filter, a water-resistant case and a new state-of-the-art O2 sensor technology with extended life.  The rechargeable Lithium-ion battery pack provides up to 10 hours of continuous operation. The QRAE 2 includes storage capacity for 64,000 datalogging points, which can be downloaded to your PC.  User configurable alarm setpoints for high, low, STEL and TWA sensor readings.

Items Included:
  • QRAE II Four Gas Meter
  • Sensors: carbon monoxide, hydrogen sulfide, combustible gases (LEL), oxygen
  • Data Download Cable
  • ProRAE Studio Software
  • Instruction Manual
  • Battery Charger with Cradle
  • Tubing
  • Calibration Record
  • Spare Filter





0 to 30%


Combustible Gas

0 to 100% LEL

1% LEL

Carbon Monoxide

0 to 1000 ppm

1 ppm

Hydrogen Sulfide

0 to 100 ppm

0.1 ppm


5" L x 2.8" W x 2" H (12.5cm x 7.2cm x 5.0cm)


12 oz (350 g)


Interchangeable Lithium-ion

Operating Period

Up to 10 hours with Lithium-ion battery

Display Graphic

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


Two-button operation

Direct Readout

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


  • 95dB buzzer (at 30 cm, typical), vibration alarm, 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
  • Pump stall alarm


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

internal pump 300 cc/min

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 122° F (-20° to 50° C) for T4 temperature code


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


Stainless-steel alligator clip