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.

• Bluetooth functionality is no longer available for ALTAIR® 4XR, 5X, 5X IR, and 5X PID Multigas Detectors as of July 2022
• 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
• 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 and sensor warranty
• Confirm compliance quickly with the Bump LED and 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