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ALTAIR® 4XR Multigas Detector

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Product Description



LEL, H2S, CO, 02

Order for more information on variations and color schemes!

The ALTAIR 4X is an extremely durable Multigas Detector that simultaneously measures up to four gases from a wide range of XCell(R) sensor options including combustible gases, O₂, CO, H₂S. The ALTAIR 4X Detector surpasses industry standards in several crucial areas. Its four-year sensor life is 60% longer than the industry average, while its 24-hour run time exceeds the industry average by 71%. This versatile portable detector is a perfect match for industries ranging from fire fighting to welding, and its digital sensor output makes it less likely to suffer from RF interference. The unit features exclusive MotionAlert™, which lets others know if the user has become immobile, and InstantAlert™, a manual alarm that alerts others of potentially dangerous situations. This rugged unit is designed to withstand a drop of up to 20 ft (6m) and uses less than half as much calibration gas as the industry average. 


Dependable multigas detector tests for LEL, oxygen, carbon monoxide, hydrogen sulfide, sulfur dioxide and nitrogen dioxide

  • Economical construction saves users more than 50% on calibration gas, replacement sensors and maintenance
  • Four-year sensor life means detector lasts 60% longer than the industry average
  • Unit uses 50% less calibration gas per minute than the average detectors within the industry
  • Two-tox CO/H2S sensor removes practically all cross-channel interference
  • Large buttons and high-contrast screen make operation easy in low-light conditions
  • Ribbed rubber housing provides secure grip and high durability
  • Unit features 95+ db alarm and ultra-bright LEDs
  • Exclusive end-of-sensor warning cautions user when unit's sensor needs to be changed
  • MotionAlert option tells others that user has become immobile
  • InstantAlert provides manual alarm to alert others of a dangerous situation


Product Videos

ALTAIR 4XR Care & Use (07:09)
Learn basic steps for daily care and use of MSA’s ALTAIR 4XR multi-gas detector. The video covers basic information which each user may require in daily handling of this instrument, including start-up sequence, gas and battery alarms, bump testing with GALAXY GX2 test station, Bluetooth Connectivity to ALTAIR Connect App
  • ALTAIR 4XR Car...
    Learn basic steps for daily care and use of MSA’s ALTAIR 4XR m...

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