Outfitted with rapid-response MSA XCell® sensors, the ALTAIR 4XR Gas Detector is the toughest 4-gas monitor on the market and is backed by a 4-year warranty.


  • Survives 25 drops from 4 feet (1.2 meters) (MIL-STD-810G 516.6 Transit Drop 3rd Party Certified)
  • Can survive an incidental 25-foot (7.5-m) drop onto concrete
  • Dust- and waterproof IP68 rating (2 meters for at least 1 hour)
  • Operating temperature range: -40°F to +140°F (-40°C to +60°C)


  • Sense gas 2 times faster than the industry average with our XCell sensors
  • 4-year instrument & sensor warranty
  • Confirm compliance quickly with the Bump LED & on-screen checkmark
  • Bump and calibrate with 1/2 the test gas and in 1/2 the time vs. industry average
  • Bump and calibrate at a specified "Time of Day" with your MSA GALAXY® GX2 Automated Test System
  • MotionAlert option tells others that user has become immobile
  • User-activated InstantAlert notifies others of a potentially dangerous situation

Sensor Options

1. Combustible (LEL)

2. Oxygen

3. Toxic

    a. CO / H2S

    b. CO (H2-Resistant) / H2S

    c. CO / H2S-LC

    d. CO / NO2

    e. SO2 / H2S-LC


Australia/ NZ (ANZEx)

Australia (NSW Mining)

MSA, gas detection, multi-gas, multi-gas detector


Confined Space

To be used by:

Fire Service


General Industry


Oil & Gas




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