MSA ALTAIR io™ 4 Gas Detection Wearable (LEL,O2,CO,H2S,NO2,SO2)

Boost on-site safety with the MSA ALTAIR io 4 Wearable Gas Detector, a rugged and connected multi-gas monitoring solution designed for industrial environments. Equipped with industry-leading XCell® sensor technology, the ALTAIR io 4 delivers fast, reliable detection of hazardous gases while providing real-time visibility and compliance insights across your workforce.

Designed for seamless deployment, the ALTAIR io 4 is ready to use right out of the box — no IT setup required. Integrated CAT-M LTE cellular connectivity keeps managers informed with live data, and the detector integrates effortlessly with the MSA Grid and ALTAIR io ecosystem for streamlined fleet management and compliance tracking.

Whether used in confined spaces, maintenance, construction, oil & gas, utilities, or mining applications, this wearable detector combines durability, connectivity, and performance to give you greater confidence in worker safety.

Key Features:

• Multi-gas detection (options for LEL, O₂, CO, H₂S, plus other sensor combinations)
• Ultra-rugged design with XCell® sensors for fast response and long life
• Built-in cellular connectivity for real-time insights and remote monitoring
• Deploys instantly with no IT support needed
• Seamless integration with MSA Grid for fleet management and compliance reporting
• Ideal for industrial safety programs where worker protection and data visibility matter 

Build your safety program with the simplicity of an MSA+ subscription for the ALTAIR io™ 4.

• Skip the capital expenditure process and up-front purchase of devices and get your gas detection program approved and running.

• When you’re a subscriber, you’re covered under warranty regardless of the age of the device.

• New features and functionality are pushed routinely to our Grid software and your fleet for instant—and ongoing—improvements to your safety program.

• MSA Connected Work Platform and ALTAIR io 4
• The ALTAIR io Ecosystem Infographic
• User Guide