MSA ALTAIR io 4 and io 6 Connected Gas Detectors
Every MSA ALTAIR io listing we stock, with its price and add to cart: 15 listings, 15 part numbers; the MSA ALTAIR io 4 wearable 4-gas detector and the ALTAIR io 6 pumped 6-gas detector with built-in cellular connectivity to the MSA Grid, plus the ALTAIR io Dock test stands, io Charge chargers and MSA id Tags, as MSA lists them. Figures below are as published by the manufacturer. Ships in 1–2 business days; most orders arrive in 3–7 business days.
Monitors by part number (6)
| Part number | Item | Gases | Sampling | Version / kit | Price | ||
|---|---|---|---|---|---|---|---|
 | 10255039 | MSA 10255039 ALTAIR io 6 5-Gas Monitor, LEL/O2/H2S/CO/SO2 | LEL/O2/H2S/CO/SO2 | Pump (sample draw) | — | $4151.78 | |
 | 10255040 | MSA 10255040 ALTAIR io 6 5-Gas Monitor, LEL/O2/H2S/CO/Cl2 | LEL/O2/H2S/CO/Cl2 | Pump (sample draw) | — | $4151.78 | |
 | 10255041 | MSA 10255041 ALTAIR io 6 5-Gas Monitor, LEL/O2/H2S/CO/NH3 | LEL/O2/H2S/CO/NH3 | Pump (sample draw) | — | $4151.78 | |
 | 10255042 | MSA 10255042 ALTAIR io 6 5-Gas Monitor, LEL/O2/H2S/CO/NO2 | LEL/O2/H2S/CO/NO2 | Pump (sample draw) | — | $4151.78 | |
 | 10245598 | MSA 10245598 ALTAIR io 4 4-Gas Monitor, LEL/O2/H2S/CO | LEL/O2/H2S/CO | Diffusion | — | $1595.24 | |
 | 10255038 | MSA 10255038 ALTAIR io 6 4-Gas Monitor, LEL/O2/H2S/CO | LEL/O2/H2S/CO | Pump (sample draw) | — | $3188.67 |
Docking stations and test stands (3)
| Part number | Item | Fits / as printed | Price | ||
|---|---|---|---|---|---|
 | 10242913 | MSA 10242913 ALTAIR io Dock Cylinder Holder, for ALTAIR io 4 | Altair Io Dock Cylinder Holder-Purchase | $1456.59 | |
 | 10246442 | MSA 10246442 ALTAIR io Dock Test Stand, for ALTAIR io 4 | Altair Io4 Global Test Stand-Purchase | $2221.66 | |
 | 10253973 | MSA 10253973 ALTAIR io Dock Test Stand, for ALTAIR io 6 | Altair Io6 Global Test Stand-Purchase | $2135.76 |
Accessories and replacement parts (6)
| Part number | Item | Fits / as printed | Price | ||
|---|---|---|---|---|---|
 | 10220388 | MSA 10220388 Test Cap, for ALTAIR io 4 | Calibration Cap Package, ALTAIR io 4 | $17.95 | |
 | 10220401 | MSA 10220401 Charger, for ALTAIR | ALTAIR io USB + Wall Charger, NA,EU,UK | $51.77 | |
 | 10223001 | MSA 10223001 Id Tag Keychain, Qty. 25, for ALTAIR io 4 | MSA id Tag Keychain, Qty. 25 | $156.75 | |
 | 10223002 | MSA 10223002 Id Tag Keychain, Qty. 100, for ALTAIR io 4 | MSA id Tag Keychain, Qty. 100 | $418.00 | |
 | 10242927 | MSA 10242927 Charger, for ALTAIR io 4 | 5-Device Smart Charger, ALTAIR io CHARGE, Purchase | $533.62 | |
 | 10253408 | MSA 10253408 Charger, for ALTAIR | ALTAIR io Cradle Charger, USB Plug, Vehicle and Desktop Use | $341.05 |
Source: Part numbers and descriptions as the manufacturer prints them; prices from the store.
ALTAIR io specifications
| Item | MSA data |
|---|---|
| ALTAIR io 4: Sampling | Diffusion |
| ALTAIR io 4: Size | 4.6 x 3.1 x 1.5 in (11.7 x 7.8 x 3.9 cm) |
| ALTAIR io 4: Weight | 9 oz (261 g) |
| ALTAIR io 4: Ingress protection | IP68 (2 m for 1 hour) |
| ALTAIR io 4: Drop test | 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 the NFPA 1982-2018 tumble tester |
| ALTAIR io 4: Battery and run time | 2 Ah rechargeable; typical full charge 4.5 hours at room temperature; charging temperature 32 °F to 104 °F (0 °C to 40 °C); battery life 17 hours typical (LTE-M), 16 hours typical (2G) |
| ALTAIR io 4: Warranty | 4 year warranty with outright purchase; always under warranty with subscription (as MSA states; subscription only in selected locations) |
| ALTAIR io 4: Approvals (selector) | Class I Div 1 Groups A, B, C, D; Class I Zone 0 |
| ALTAIR io 6: Sampling | Pump (sample draw) |
| ALTAIR io 6: Size | 5.90 x 3.23 x 2.24 in (14.98 x 8.20 x 5.69 cm) |
| ALTAIR io 6: Weight | 0.9 lb (14.4 oz) |
| ALTAIR io 6: Ingress protection | IP65 |
| ALTAIR io 6: Drop test | Exceeds 26 drops from 4 ft (1.2 m) (MIL-STD-810G 516.6 transit drop); capable of surviving an incidental 10 ft (3 m) drop onto concrete; survives 60 minutes in the NFPA 1982-2018 tumble tester |
| ALTAIR io 6: Battery and run time | Removable and rechargeable; typical full charge 6.5 hours at room temperature; charging temperature 32 °F to 104 °F (0 °C to 40 °C); battery life 16 hours typical, 13 hours with the PID sensor |
| ALTAIR io 6: Warranty | 4 year warranty with outright purchase; always under warranty with subscription (as MSA states; subscription only in selected locations and excludes certain sensors) |
| ALTAIR io 6: Approvals (selector) | Class I Div 1 Groups A, B, C, D; Class I Zone 0; CSA |
Source: MSA ALTAIR io 4 Gas Detection Wearable specifications 1708-056-MC (PDF); MSA ALTAIR io 6 Multigas Detector specifications 1708-116-MC (PDF).
ALTAIR io sensor ranges
| Model | Gas | Range and resolution (as printed) |
|---|---|---|
| ALTAIR io 4 | combustible gas (LEL) | 0-100% LEL (1% LEL) or 0-5 vol% (0.05 vol%), catalytic, typical life 5 years or varying |
| ALTAIR io 4 | oxygen (O2) | 0-30 vol% (0.1 vol%), electrochemical, typical life 7 years |
| ALTAIR io 4 | carbon monoxide (CO) | 0-1,999 ppm (1 ppm), electrochemical, typical life 7 years; CO hydrogen-resistant 0-1,999 ppm |
| ALTAIR io 4 | hydrogen sulfide (H2S) | 0-199 ppm (1 ppm); H2S low concentration 0-99.9 ppm (0.1 ppm), electrochemical, typical life 7 years |
| ALTAIR io 4 | sulfur dioxide (SO2) | 0-20 ppm (0.1 ppm) |
| ALTAIR io 4 | nitrogen dioxide (NO2) | 0-50 ppm (0.1 ppm) |
| ALTAIR io 6 | combustible gas (LEL) | 0-100% LEL or 0-5% vol CH4, catalytic, sensor life 5 years |
| ALTAIR io 6 | oxygen (O2) | 0-30% vol, electrochemical, 7 years |
| ALTAIR io 6 | carbon monoxide (CO) | 0-2000 ppm, electrochemical, 7 years; CO hydrogen-resistant 0-1999 ppm |
| ALTAIR io 6 | hydrogen sulfide (H2S) | 0-200 ppm, electrochemical, 7 years; H2S low concentration 0-100 ppm |
| ALTAIR io 6 | chlorine (Cl2) | 0-10 ppm, electrochemical, 4 years |
| ALTAIR io 6 | ammonia (NH3) | 0-100 ppm, electrochemical, 4 years |
| ALTAIR io 6 | sulfur dioxide (SO2) | 0-20 ppm, electrochemical, 7 years |
| ALTAIR io 6 | nitrogen dioxide (NO2) | 0-50 ppm, electrochemical, 7 years |
| ALTAIR io 6 | volatile organic compounds (VOC, PID sensor) | VOCs PID 0.1 ppm (0-999 ppm) or 1 ppm (1000-2000 ppm), 3 years |
Source: MSA ALTAIR io 4 Gas Detection Wearable specifications 1708-056-MC (PDF); MSA ALTAIR io 6 Multigas Detector specifications 1708-116-MC (PDF).
Approvals, as MSA prints them
| Mark | As printed |
|---|---|
| ALTAIR io 4: USA / Canada | FCC and Industry Canada; Class I, Division 1, Groups A, B, C and D T4, -20 °C to +55 °C; Class I, Zone 0, AEx da ia IIC Ga T4 |
| ALTAIR io 6: USA / Canada | FCC and Industry Canada; CSA; Class I, Division 1, Groups A, B, C and D T4, -20 °C to +55 °C; Class I, Zone 0, AEx da ia IIC Ga T4 |
Source: MSA ALTAIR io 4 Gas Detection Wearable specifications 1708-056-MC (PDF); MSA ALTAIR io 6 Multigas Detector specifications 1708-116-MC (PDF). The label on the instrument governs.
ALTAIR io documents
- Bulletin: ALTAIR io 6 Multigas Detector (PDF)
- Technical Bulletin: ALTAIR 2X, 4XR & 5X Gas Detectors & ALTAIR io 4 Gas Detection Wearable & ALTAIR io 6 Multigas Detector Electrochemical Sensor Cross-Sensitivity Data (PDF)
- Technical Specifications: ALTAIR io 6 Multigas Detector (PDF)
- IEC 61010-1: ALTAIR io 6 (PDF)
- CSA: ALTAIR io 6 (PDF)
- ALTAIR io 4 Gas Detection Wearable Specifications (PDF)
- Technical Bulletin: Sensor Talks LEL Sensors (PDF)
- Technical Bulletin: XCell Sensors (PDF)
- CSA: ALTAIR io 4 (PDF)
- CSA: ALTAIR io 4 / io 4 Performance (PDF)
- UL- Haz Loc: ALTAIR io 4 (PDF)
- IEC 62368-1: ALTAIR io / io 4/ io 6 DOCK (PDF)
- IEC 61010-1: ALTAIR io / io 4 / io 6 DOCK (PDF)
- IEC 61010-1: ALTAIR io Charge (PDF)
Source: MSA product pages, fetched Nov 10 2026.
Guides: bump test vs calibration · how to read a gas monitor alarm · what Class I Div 1 means · ATEX vs intrinsically safe · sensor life · gas detection records · every gas monitor by gas, sampling and battery.
MSA ALTAIR io 4 and io 6 Connected Gas Detectors questions
Which ALTAIR io listings do you stock? 10255039, 10255040, 10255041, 10255042, 10245598, 10255038, 10242913, 10246442, 10253973, 10220388, 10220401, 10223001, 10223002, 10242927, 10253408.
Where do the figures on this page come from? From the MSA product pages and documents fetched Nov 10 2026 and the MSA bulletins and 2026-2027 catalog; each product page cites its source under every table.
How do I pick the right part number? Open the product page: it lists the gases, kit contents, fits and alarm set points as the manufacturer prints them, with the related part numbers in the same family.
Do you ship nationwide? Yes. Ships in 1–2 business days; most orders arrive in 3–7 business days.