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ALTAIR io 4 Gas Detection Wearable

Tough. Intuitive. Connected.

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

ALTAIR io 4 features:

  • Available through MSA+, our comprehensive subscription program including hardware and software, gives you access to powerful cloud-based solutions enabling faster implementation, increased warranty coverage and automatic software and firmware upgrades – with minimal capital expense
  • Designed with fully integrated connectivity for real-time visibility across your worksites from Day One
  • CAT-M LTE cellular connectivity and integration with the MSA Grid
  • Deploys in seconds, right out of the box. No IT required
  • Rugged, durable design and Industry-Leading XCell® Sensors
  • Survives a 25-foot drop test. Breakthrough sensor design enables faster response and shorter span calibrations
  • 1 to 4 gas options available. Sensor Options: Combustible (LEL), Oxygen, Carbon Monoxide, Hydrogen Sulfide, Methane, Sulfur Dioxide, Nitrogen Dioxide, H2S Low-Concentration, CO, Hydrogen-Resistant SO2

The ALTAIR io 4 is part of the MSA Connected Work Platform, which helps to simplify safety, curb risk, and boost productivity.

ALTAIR io™ 4 Gas Detection Wearable

  • Specifications


    Turnarounds & Plant Maintenance

    Emergency Response

    Confined Space

    Approvals / Standards

    FCC and Industry Canada

    Class I, Division 1, Groups A, B, C and D T4 -20C to +55C

    Class I, Zone 0, AEx da ia IIC Ga T4

    Cellular Carriers

    USA Verizon Coverage

    AT&T Global Network

    LTE-M / 2G Fallback

    Data Logging

    Minimum 90-day cloud-synced data logs. Device data synced and stored in customer Grid account.

    Display Type

    High-resolution liquid crystal display

    Location Awareness

    GNSS: Concurrent GNSS (GPS and GLONASS)

    GPS Accuracy: 2.5 meter: GPS accuracy will be influenced by surroundings, infrastructure, & environmental conditions




    Oil & Gas


    Fire Service

    General Industry

    Operating Temperature

    -20C to +55 C (-4F to +131 F)

    Run Time

    17 Hours under standard operating conditions


    Weight: 261 grams (9 oz)

    Dimensions: 11.7 x 7.8 x 3.9 cm (4.6 x 3.1 x 1.5 in)


    Always under warranty with subscription

    Battery & Charging

    • Battery: 2 Ah Rechargeable
    • Charge Time: Typical full charge is 4.5 hours at room temperature
    • Charging Temperature Range: 0°C-40°C*


    • Exceeds 26 drops from 4 feet (1.2 m) (MIL-STD-810G 516.6 Transit Drop)
    • Capable of surviving an incidental 25 foot (7.5 m) drop onto concrete
    • Survives 60 minutes in NFPA 1982-2018 tumble tester
    • Dust and waterproof IP68 rating (2 m for 1 hour)

    Sensor Life

    Gas Type Typical Sensor Life* Range Resolution
    Combustible Catalytic 5 Years 0-100% LEL or Varying Vol % 1% LEL or 0.05 Vol %
    O2 Electrochemical 7 Years 0 – 30 Vol % 0.1 Vol %
    CO Electrochemical 7 Years 0 – 1,999 ppm 1 ppm
    H2S Electrochemical 7 Years 0 – 199 ppm 1 ppm
    H2S Low Concentration (Coming Soon) Electrochemical 7 Years 0 – 99.9 ppm 0.1 ppm
    SO2 (Coming Soon) Electrochemical 7 Years 0 – 20 ppm 0.1 ppm
    NO2 (Coming Soon) Electrochemical 7 Years 0 – 50 ppm 0.1 ppm
    CO – Hydrogen Resistant Electrochemical 7 Years 0 – 1,999 ppm 1 ppm
    * Typical sensor life can vary due to environmental conditions and / or combustible sensor poisoning
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