MultiRAE IR Gas Meter

Manufacturer: RAE Systems
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The MultiRAE IR combines a PID (Photoionization Detector) and Carbon Dioxide (CO2) sensor with O2, LEL, and one specific toxic gas sensor in one compact monitor with sampling pump. The MultiRAE IR's versatility allows it to replace a wide range of monitors, saving training and maintenance costs. The MultiRAE IR is quickly and easily changed from a sophisticated technician instrument to a simple text or display only monitor. The same monitor can be used as a personal monitor, a hand-held sniffer or as a continuous, operational area monitor for use in applications such as indoor air quality and industrial hygiene.

Key Features:

  • O2, LEL, PID, CO2, and any plug-in "smart" toxic sensors: CO, H2S, SO2, NO, NO2, Cl2, HCN, NH3, PH3
  • 0-20,000 ppm measurement of CO2 using our patented non-dispersive infrared (NDIR) sensor
  • 0-2,000 ppm measurement of VOCs (volatile organic compounds) with 0.1 ppm resolution
  • Measure more chemicals than with any other PID: With over 60 Correction Factors built into the MultiRAE IR memory and the largest printed list of Correction Factors in the world (300+), RAE Systems offers the ability to accurately measure more ionizable chemicals than any other PID!
  • Drop-in Battery: When work schedules require putting in more than the 12 hours supplied by the advanced Lithium-ion (Li-ion) battery, the drop in alkaline pack supplied with every MultiRAE IR allows you to finish the job.
  • User friendly screens make it easy to use for simple applications and flexible enough for sophisticated options.
  • Rugged Rubber Boot: The standard rubber boot helps assure that the MultiRAE IR survives the bumps and knocks of tough field use.
  • Strong, built-in sample pump draws up to 100' (30m) horizontally or vertically. Liquid trap and automatic low flow alarm protect the MultiRAE IR from damage.
  • Large keys are operable even with 3 layers of gloves
  • Easy-to-read display with backlight
  • Store up to 80 hours of data at one minute interval for all 5 sensors for download to PC (with the optional datalogging).
  • Loud audible alarm that varies for different alarm conditions and an optional external vibration alarm for noisy areas


  • Non Dispersive infrared sensor for CO2
  • Protected catalytic bead for combustible gases
  • Interchangeable electrochemical sensors for oxygen and toxic gases
  • Photoionization detector for VOCs, 10.6 eV lamp standard


Range Resolution Response Time (t90)
CO2 0-20000 ppm 10 ppm  60 sec
O2 0-30 % 0.10%  15 sec
VOC 0-200 ppm 0.1 ppm  10 sec
VOC 200-2000 ppm 1 ppm  10 sec
LEL 0-100 % 1%  15 sec
CO 0-500 ppm 1 ppm  20 sec
H2S 0-100 ppm 1 ppm  30 sec
SO2 0-20 ppm 0.1 ppm  15 sec
NO 0-250 ppm 1 ppm  20 sec
NO2 0-20 ppm 0.1 ppm  25 sec
Cl2 0-10 ppm 0.1 ppm  60 sec
HCN 0-100 ppm 1 ppm  60 sec
NH3 0-50 ppm 1 ppm  150 sec
PH3 0-5 ppm 0.1 ppm  60 sec


  • Interchangeable Li-Ion and alkaline battery packs
  • Rechargeable units include Li-Ion battery pack with internal smart charging. 120V AC/DC wall adapter and spare alkaline battery pack

Operating Hours

  • 12 hours continuous
  • Unit will run and charge simultaneously


  • 2 line, 16 digit LCD with LED back light automatically in dim light or alarm condition

Key Pads

  • 1 operation key and 2 programming keys

Direct Readout

  • Instantaneous values:
    • Oxygen as % by vol
    • Combustible gas as % of lower explosion limit (LEL)
    • Toxic gases, CO2 and VOCs as parts per million by volume
    • High and low values for all gases
    • STEL & TWA values of toxic gases, VOCs and CO2
    • Battery and shut down voltage
    • Date, time, elapsed time, temperature, LEL/VOC scale (using correction factors)


  • 90 dB buzzer and flashing red LED to indicate exceeded preset limits:
    • High - 3 beeps and flashes per second
    • Low - 2 beeps and flashes per second
    • STEL & TWA - 1 beep and flash per second
  • Alarms automatic reset or latching with manual override
  • Additional diagnostic alarm and display message for low battery and pump stall


  • Two point field calibration for zero and span gas


  • 20,000 points (80 hours, 5 channels at one minute intervals) down load to PC with serial number of unit, user ID, site number, calibration date

Sampling Pump

  • Internal pump with user selectable flow rate:
    • Low: 150 cc/min
    • High: 250 cc/min


  • -4° to 113° F


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


  • 4.65" L x 3" W x 1.9" H


  • 16 ounces


  • Lifetime on non-consuming components
  • 2 year for CO2, O2, LEL, CO, H2S sensors
  • 1 year all other sensors
  • 1 year pump, battery, 10.6 eV PID lamp
Specifications subject to change without notice

  • Indoor Air Quality
  • Beverage and Brewery
  • Food Industry
  • Hospitals
  • Respirable Breathing Air Testing