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The ALTAIR® 4XR Multigas Monitor provides fast, rugged 4-gas detection for hazardous industrial and oil & gas environments with real-time sensor response under 15 seconds. Engineered for extreme durability, it features IP68 water/dust resistance, MIL-STD-810G drop testing, and a 4-year instrument and sensor warranty.
| Country of Origin | United States (US) |
| ATEX Rating | II 1G II 1G Ex da ia IIC T3 Ga Ex ia IIC T3 Ga EN 60079-29-1 Ta = -40°C to +60°C Ta = -40°C to +60°C |
| Hazardous Area Rating | Class I, Division 1, Groups A, B, C, & D T3, Class II, Division 1 Groups E, F, & G |
The ALTAIR® 4XR Multigas Monitor is a rugged, fast-responding 4-gas detection device engineered for demanding hazardous environments, including chemical processing, oil & gas facilities, and manufacturing plants. Designed to monitor combustible gases (LEL), oxygen deficiency/enrichment (O₂), and toxic gases such as CO, H₂S, SO₂, and NO₂, this monitor ensures worker safety in critical applications. With global intrinsic safety ratings (Class I, Div 1, ATEX, IECEx) and integrated safety features like MotionAlert™ and InstantAlert™, it provides continuous protection across harsh industrial sites.
Powered by patented MSA XCell® ASIC-driven sensors, the ALTAIR 4XR achieves response times under 15 seconds—up to twice as fast as the industry average—while using 50% less test gas during calibration. Built for extreme field operations, it features a glove-friendly single-button interface, an ultra-rugged rubber-armored housing, and 24-hour continuous battery runtime to support long multi-shift duties. The unit withstands 25 drops from 4 feet, resists 25-foot concrete falls, and delivers submersibility under its IP68 rating, making it an essential tool for plant turnarounds and confined space entry.
✅ Class I, Div 1 (Groups A, B, C, D) & ATEX/IECEx Ex ia da IIC T4 Ga hazardous area certifications
✅ Patented MSA XCell® ASIC sensors with 4+ year expected life and predictive end-of-life warnings
✅ IP68 dust/water ingress rating (submersible up to 2m for 1 hour) & MIL-STD-810G drop tested
✅ Optional phosphorescent glow-in-the-dark housing for low-light visibility
✅ Real-time detection for LEL, O₂, CO, H₂S, H₂S-LC, SO₂, and NO₂
✅ MotionAlert™ (man-down alarm) and InstantAlert™ (manual emergency callout) safety systems
✅ Long-life rechargeable Li-polymer battery with 24-hour continuous operating runtime
✅ 95 dB audible horn, ultra-bright top/bottom LEDs, and strong vibrating alarm
✅ Glove-friendly 3-button physical interface with large visual bump test compliance checkmark
🔹 Standard Configuration: ALTAIR 4XR Multigas Monitor with integrated XCell sensors, rechargeable Li-polymer battery, charger, and standard housing.
| Feature | Details |
|---|---|
| Product Name | ALTAIR® 4XR Multigas Monitor |
| Target Gases | Combustibles (LEL), Oxygen (O2), Carbon Monoxide (CO) Hydrogen Sulfide (H2S), Low-Conc. H2S Sulfur Dioxide (SO2), Nitrogen Dioxide (NO2) |
| Sensor Technology | MSA XCell® ASIC-Driven Sensors (Catalytic Bead & Electrochemical) |
| Response Time (t90) | <15 seconds for LEL, CO, H2S, O2, H2S-LC, NO2 SO2 (<10 seconds for O2) |
| Dimensions | 4.4×3.0×1.3 in (112×76×33 mm) |
| Weight | 8.0 oz (228 g) without clip |
| Ingress Protection | IP68 (Submersible to 2 meters for at least 1 hour) |
| Drop Resistance | MIL-STD-810G Certified; 25 drops @ 4 ft (1.2m) 25 ft (7.5m) concrete drop |
| Operating Temperature | −40∘F to +140∘F (−40∘C to +60∘C) |
| Humidity Range | 5%–95% RH non-condensing |
| Battery & Runtime | Rechargeable Li-polymer, 24 hours at 20∘C |
| Alarms | 95 dB audible horn @ 30 cm 4 ultra-bright top/bottom LEDs high-intensity vibrating alarm |
| Safety Alarms | MotionAlert™ (man-down alarm) and InstantAlert™ (manual emergency alarm) |
| North America Approvals | Class I, Div 1, Groups A, B, C, D Class II, Div 1, Groups E, F, G Class III; Temp Code T4 |
| ATEX/IECEx Approvals | II 1G Ex ia da IIC T4 Ga −40∘C to +60∘C, IP68 |
| Warranty | 4-Year Full Instrument & Sensor Warranty[cite: 1] |
🔗 Certificate of Compliance– Class I, Div 1, Groups A, B, C, D; Class II, Div 1, Groups E, F, G; Class III; Temp Code T4
🔗 ATEX Certificate – II 1G Ex ia da IIC T4 Ga (-40°C to +60°C), IP68
🔗 Australia / NZ (ANZEx) – Ex ia da IIC T4 Ga
🔗 MIL-STD-810G – Transit drop certified (25 drops @ 4 ft)
🔗 Ingress Protection – IP68 (submersible up to 2 meters for 1 hour; dust-tight)
🔗Download Datasheet
🔹 Oil & Gas
🔹 Chemical Plants
🔹 Mining
🔹 Labs
🔹 Manufacturing
📦 1x ALTAIR 4XR Multigas Monitor
📦 1x Integrated Rechargeable Li-polymer Battery
📦 1x Charging Cradle & Power Adapter
📦 1x Calibration Cap & Tubing
📦 1x Stainless Steel Alligator Clip
📦 1x Ex-Protective Armor (Over-molded Rubber Housing)
📦 1x Documentation Kit & Quick Start Guide
📦 Lead Time: 2 - 3 weeks
📍 Shipping Terms: Worldwide / Expedited Options
💳 Payment Options: Credit Card, PayPal, Net 30 Terms
How fast do the MSA XCell sensors respond?
MSA XCell sensors feature integrated ASICs that allow them to respond in under 15 seconds (t90) for LEL, CO, H₂S, and O₂, which is up to twice as fast as the industry average.
What is the MotionAlert system?
MotionAlert triggers a progressive visual and audible alarm if the monitor detects that a worker has been immobile for 30 seconds.
What drop protection ratings does the unit carry?
The unit is MIL-STD-810G transit drop certified for 25 drops from 4 feet (1.2m) and can withstand incidental drops of 25 feet (7.5m) onto concrete.
What warranty is provided with the ALTAIR 4XR?
MSA provides a comprehensive 4-year full warranty covering both the instrument and the XCell sensors.
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