ALTAIR® 4XR Multigas Detector

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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.

Safety io compatible product

Part Number

ALTAIR 4XR Multigas Detector, (LEL, O2, H2S & CO), Charcoal case, North American charger

Length: 118.000 MM (4.646 IN)
Width: 73.000 MM (2.874 IN)
Height: 55.000 MM (2.165 IN)
Weight: 0.230 KG (0.507 LB)

ALTAIR 4XR Multigas Detector, (LEL, O2, H2S & CO), Glow-in-the-dark case, North American charger

Length: 117.000 MM (4.606 IN)
Width: 74.000 MM (2.913 IN)
Height: 56.000 MM (2.205 IN)
Weight: 0.230 KG (0.507 LB)


  • 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
Markets: Fire Service, Construction, General Industry, Mining, Oil & Gas, Utilities
Applications: Confined Space

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

Case Color
1. Charcoal gray
2. Glow-in-the-dark