MSA Altair, USA Single gas detector, option O2, CO, H2S




The MSA Altair Maintenance-Free Single-Gas Detector comes is available in variety of gas detection models including oxygen, carbon monoxide, and hydrogen sulfide. The unit is designed to notify users of gas monitoring with visual alarms of ultra-bright LED lights (which remain visibly noticeable when stored in pockets) and a screen display, distinct audible alarms of over 95 decibels, and vibrating alarms. The triple alarm system will ensure that users and those nearby are appropriately alerted to gas situations in the environment. Most notably, the alarm system is designed to alert users regardless of hearing or visual impairment.

Altair Maintenance-Free Single-Gas Detector features

The unit also features patented MSA-built Button Cell toxic gas sensors. The breakthrough design utilizes stainless steel construction and its technology virtually eliminates sensor leakage. The oxygen sensors are equipped with industry standard fast response sensors. Furthermore, its use of microelectronic technology ensures that the cell size does not interfere with the portability of the device.

Worksites interested in assessing alarm conditions and history will find the automatic internal record keeping of the device to be useful. Using MSA InfraRed communication technology, the Altair Maintenance-Free Single-Gas Detector automatically stores the last 25 alarm events. The InfraRed communication adapter allows users to adjust settings and assess alarm conditions.

Easy to use

The Altair Maintenance-Free Single-Gas Detector offers a display that is easy to read. Alerts are noted in a large numeric display, and many functions may be performed with the touch of a button. The oxygen version allows users to monitor current levels as well as highest and lowest readings with ease.

The unit’s ease of use is integral when working in potentially dangerous conditions. These low maintenance unit’s are key features of the products advanced design. Long-life lithium batteries typically perform for two years or more, and are designed to outlast a two-minute alarm mode per day. This type of battery efficiency places the Altair Maintenance-Free Single-Gas Detector well above its closest competitors in longevity.

The unit allows for easy bump checks by pressing “Gas Test.” Once tested, the unit displays a checkmark on the screen for 24 hours. The detectors also offer built-in calibrations, as required for some worksites. For other gas response tests and bump checks, the Altair Maintenance-Free Single-Gas Detector is compatible with Altair Quick-Check Stations. These stations are another maintenance free way to ensure the quality and reliability of the industry’s leading gas detection devices.


Not only is the unit functional, but it is built to last. With a suspension clip allowing versatility in placement, the unit is designed to be worn where needed and remain in place even during the roughest use. The gas detector is also housed in an ultra-thick rubberized casing which can withstand accidental drops. The Single-Use Gas Detector is also water and dust resistant and provides a seal tight enough to exceed industry averages. Weighing approximately 4 ounces, the Altair Maintenance-Free Single-Gas Detector is highly portable and may be worn anywhere on the body near the breathing area.

Exceeding industry standards is the norm for MSA, and those in dangerous work settings can rest assured that The Safety Company has provided the very best in gas detection technology.



All your MSA Gas Detection needs. We carry the entire line of MSA Gas detection equipment including the Altair 4X, Altair 4XR, Altair 5X, Sirius, Altair and Altair Pro Single Gas, replacement sensors and parts, calibration gas, and much more! MSA gas detection for single or multi gas detectors are available in compact, light weight models and are extremely reliable, robust and fully configurable and maintenance friendly. The personal gas detection of MSA can be used for every application and under the most severe conditions!


Technical Specification

Weight 4.0 oz including clip
Dimensions 3.4” x 2.0” x 1.0”
Gases and Measuring Ranges Gas Range
Oxygen 0-25% by vol
Carbon Monoxide 0-500 PPM
Hydrogen Sulfide 0-100 PPM
Alarms Average >95 dB @ 30 cm, Ultra – LEDs, vibrating alarm standard
Warranty 2 years or 1080 minutes (18 hrs) of alarm under normal conditions
Instrument life >2 years at an average of 2 minutes of alarm per day
Operating Temperature Range -20ºC to +50ºC
Humidity 10-95% RH non-condensing
Ingress Protection IP67
Event Logging 25 latest events
Certifications US and Canada: Class 1, Division 1, Groups A, B, C and D / Europe: ATEX II 2G EEx ia IIC T4 -20ºC to +50ºC / Australia: Ex ia IIC T4 -20ºC to +50ºC




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