Manufacturer: RAE Systems
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The VRAE is a powerful, pumped, 1-5 gas monitor that monitors combustibles in the percent by volume range regardless of oxygen levels. The VRAE is capable of monitoring either combustibles, oxygen, and three toxic gases or combustibles and four toxic gases. Its durable Nickel-Metal-Hydride batteries, powerful internal pump and rugged frame make it ideal for leak detection and site surveys.

Key Features

  • Toxic sensors include CO, H2S, SO2, NO, NO2, Cl2, NH3, HCN, PH3
  • Large alarm-activated backlit LCD display
  • Visual alarm with flashing LED
  • Large keys usable with gloved hand
  • Rigid inlet probe
  • 10 hours continuous operation
  • Sample collection port
  • Optional 16,000 data points downloadable to PC
  • Strong protective rubber boot
  • Protected from interference by portable radios (RFI)
  • Internal sample draw pump for quick response and remote sampling
  • Smart battery charging with status indication and LED indicator
  • Snap-in rechargeable NiMH or alkaline battery pack
  • 48 built-in Correction Factors for LEL sensor
  • 4 toxic sensor version available


  • 8.3" L x 3.0" W x 1.9" H (21 cm x 7.6 cm x 4.9 cm)


  • 20 oz with battery pack (568 g)


  • Catalytic sensor for combustible gas
  • Thermal conductivity sensor for percentage volume combustible gas
  • Electrochemical sensors for oxygen and toxic gases

Sensor Specifications

  Range Extended Range Resolution
Combustible 0 to 100% LEL   1%
  0 to 100% VOL   1%
Oxygen 0 to 30.0%   0.10%
Carbon Monoxide 0 to 500 ppm 1500 ppm 1 ppm
Hydrogen Sulfide 0 to 100 ppm 500 ppm 1 ppm
Sulfur Dioxide 0 to 20.0 ppm 150 ppm 0.1ppm
Nitric Oxide 0 to 250 ppm 1000 ppm 1ppm
Nitrogen Dioxide 0 to 30.0 ppm 150 ppm 0.1 ppm
Chlorine 0 to 10.0 ppm 30 ppm 0.1 ppm
Hydrogen Cyanide 0 to 100 ppm 100 ppm 1 ppm
Ammonia 0 to 50 ppm 200 ppm 1 ppm
Phosphine 0 to 5.0 ppm 20 ppm 0.1 ppm



  • Rechargeable, snap-in, field replaceable 4.8V, 1.1 Ah NIMH attery pack, 4 AA battery adapter

Operating Hours

  • 10 hours continuous operation


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


  • 1 operation and 2 programming keys

Direct Readout

  • Instantaneous reading (up to 5 values)
  • Oxygen as percentage by volume
  • Combustible gas as percentage by volume or percentage of lower explosive limit (LEL)


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


  • Optional 16,000 points (53 hours, 5 channels at one minute intervals) download to PC with serial number of unit, user ID, site ID and calibration date


  • Two-point field calibration of zero and span gas

Sampling Pump

  • Internal pump, flow rate 400 cc/minute
  • Automatic shut off at low flow condition

Hazardous Area Approval

  • US: UL, cUL, Classified as Intrinsically Safe for use in Class I, Division 1 Groups A, B, C, D, Hazardous Locations T3C rating


  • -4° F to 113° F (-20° C to 45° C)


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


  • Durable rubber boot and wrist strap


  • Lifetime on non-consuming components (per RAE Systems Standard Warranty), 2 years for O2, LEL, CO and H2S sensors, 1 year for all other sensors, 1 year pump, 1 year battery
Specifications are subject to change

  • Confined Space Entry
  • Refineries and petrochemical plants including offshore drilling and plant shut downs
  • Waste water treatment plants
  • Shipyard and maritime
  • Landfill operations
  • Trenches, silos, railcars
  • Food processing, refrigeration, decomposition, process off gasing, poultry farms
  • Cable vaults, transformer stations
  • Fire departments