Multi-gas detector MSA ALTAIR io™ 4

Portable multigas detector

Robust. Intuitive. Connected.

With fully integrated cellular connectivity right out of the box, the ALTAIR io 4 delivers real-time visibility to help increase safety and productivity between workers, workplaces and workflows.

Support worker safety and connectivity with the ALTAIR io 4 portable gas detector
ALTAIR io 4 is a safe, smart gas detector with out-of-the-box connectivity packed into an extremely rugged design – featuring our XCell sensor platform that continues to lead the industry in lifetime and sustainability. ALTAIR io 4 was designed from the ground up to work seamlessly with MSA Grid and ALTAIR io Dock, providing hassle-free compliance, easy fleet management, and incredible visibility into your work safety like you've never had before.


ALTAIR io 4 features:

  • Available through MSA+, our comprehensive subscription program including hardware and software, gives you access to powerful cloud-based solutions that enable faster deployment, increased warranty coverage and automatic software and firmware upgrades – with minimal capital cost
  • Designed with fully integrated connectivity for real-time visibility across your workplaces from day one
  • CAT-M LTE cellular connectivity and integration with MSA Grid
  • Deploys in seconds, straight out of the box. No IT required
  • Robust, durable design and industry-leading XCell® sensors
  • Groundbreaking sensor design enables faster response and shorter calibrations
  • 1 to 4 gas options available. Sensor options: flammable (LEL), oxygen, carbon monoxide, hydrogen sulfide, methane, sulfur dioxide, nitrogen dioxide, H2S low concentration, CO, hydrogen resistant SO2

Measuring range:

Combustible gas: 0 – 100%
Oxygen: 0 – 30 vol%
Hydrogen sulphide: 0 – 200 ppm
Carbon monoxide: 0 – 1999 ppm

Upcoming sensors
Sulfur dioxide: 0 – 20 ppm
Nitrogen dioxide: 0 – 50 ppm
Carbon monoxide – Hydrogen filtered 0-1999 ppm

Operating time: 17 hours, at room temperature (rechargeable battery)
Dimensions / Weight: 11,7 cm x 7.8 cm x 3.9 cm / 261g
Protection class: IP 68

Directive 2014/34/EU (ATEX): II 1G Ex ia da IIC T4 Ga, –40°C to +60°C, IP68

Product sheet
AltAir io 4-Data sheet


4G, ATEX, Electrochemical, GSM, Catalytic


Oxygen O2, Carbon monoxide CO, Nitrogen dioxide NO2, LEL Below the explosion limit, Sulfur dioxide SO2, Hydrogen sulphide H2S


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