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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. The ALTAIR 4XR can also provide real-time incident awareness to team members, supervisors, safety managers and others when paired with the MSA ALTAIR Connect app via a Bluetooth® wireless connection.

ALTAIR® 4XR Multigas Detector

  • Real-time

    • Sense gas 2 times faster than the industry average with our XCell sensors
    • Quickly update MSA ALTAIR 4XR settings via the ALTAIR Connect app (available on the Google Play Store)
    • Send event notifications via text message with the ALTAIR Connect app


    • 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)


    • 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

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