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Brand: MSA Safety
MSA ALTAIR Pro Single-Gas Detector (O2, HCN, ClO2, PH3)
Description
MSA ALTAIR Pro single-gas detector explained
The MSA ALTAIR Pro is a pocket-size, one-gas personal monitor built for specialist toxic gases and oxygen. Where a general detector carries CO and H2S, the ALTAIR Pro line is the one used when the hazard is oxygen deficiency, hydrogen cyanide, chlorine dioxide or phosphine. It runs on a single replaceable CR2 lithium battery, uses one pushbutton and is rated IP67. Seven Star LLC is an independent supplier in Muscat and supplies ALTAIR Pro detectors and spares in Oman and the GCC; we are not affiliated with the manufacturer.
The sensor type is chosen when the unit is ordered, so the ALTAIR Pro is described here by its available sensor ranges and default alarm points from the manufacturer bid specification.
ALTAIR Pro technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer / part number | MSA / ALTAIR Pro single-gas detector (sensor selected at ordering) |
| Size and weight | Not more than 3.4 x 2.0 x 1.0 in; 4.0 oz (about 113 g) including clip |
| Housing | Polycarbonate with rubber overmolding; IP67 for dust and water |
| Power | One replaceable CR2 lithium battery; typical battery life above one year |
| Sensor life | Two years, sensor and battery both replaceable |
| Alarms | Bright LEDs visible from top, front and sides, vibration, audible 95 dB average at 1 ft |
| Operating temperature | -20 to 50°C |
| Humidity | 10 to 95 % RH, non-condensing |
| Event log | At least the latest 50 events |
| Data log | Default three-minute peak readings; configurable from 15 seconds to 15 minutes |
| Data access | MSA infrared link and MSA Link software |
| Warranty | Two years (battery excluded); one year on ClO2, HCN and PH3 sensors |
Gases and default alarm points of the ALTAIR Pro
The specification lists four electrochemical sensor options. The standard alarm points shown are factory defaults, and every alarm (low, high, STEL and TWA) can be adjusted in the field through the infrared link.
| Gas | Range | Resolution | Low / High | STEL / TWA |
|---|---|---|---|---|
| Oxygen (O2) | 0-25 % | 0.1 Vol.% | 19.5 % / 23.0 % | not applicable |
| Hydrogen cyanide (HCN) | 0-30 ppm | 0.5 ppm | 4.5 / 10 ppm | 10 / 4.5 ppm |
| Chlorine dioxide (ClO2) | 0-1.00 ppm | 0.02 ppm | 0.1 / 0.3 ppm | 0.3 / 0.1 ppm |
| Phosphine (PH3) | 0-5.00 ppm | 0.05 ppm | 0.3 / 1.0 ppm | 1.0 / 0.3 ppm |
How the ALTAIR Pro is operated
Everything is done with one button. A three-second hold switches the unit on and a five-second hold switches it off, which prevents it being turned off by accident in a pocket or on a harness. The display shows the gas concentration in ppm, or percent for oxygen, with a heartbeat dot and a confidence flash roughly every 60 seconds to confirm that the instrument is alive. A backlight comes on at the start of any alarm or on a button press. After a successful bump test the screen shows a checkmark for 24 hours, so a supervisor can see at a glance that the daily check was done.
Calibration also uses the one button and needs no tools apart from tubing, a cylinder and a regulator; no calibration cap is required. Calibration gas set points are user-adjustable to match the cylinder in use.
ALTAIR Pro compared with other ALTAIR detectors
Within the portable range, the ALTAIR Pro is the narrow specialist. The ALTAIR 2X covers one or two common toxic gases with XCell sensors, the ALTAIR 4XR and ALTAIR 5X add combustible and oxygen channels with a pump, and the ALTAIR io family adds connectivity. Choose the ALTAIR Pro when a single named gas is the permit requirement, for example phosphine during fumigation work, hydrogen cyanide near certain chemical processes or chlorine dioxide in water treatment.
ALTAIR Pro selection checklist
- Identify the gas: oxygen, HCN, ClO2 or PH3, and confirm the range suits your exposure limits.
- Check the default alarm points against the limits that apply on site and request changes through the infrared link if needed.
- Decide on accessories: suspender-style clip, lanyard, cell-phone belt clip or hard-hat clip are all listed options.
- Plan a bump and calibration routine with a regulator and the correct span gas for the chosen sensor.
- Confirm the intrinsic safety approval required: UL and CSA Class I Division 1 Groups A-D T4, ATEX II 2G EEx ia IIC T4, or Australian Ex ia IIC T4.
- Allow for the shorter one-year warranty on ClO2, HCN and PH3 sensors when planning spares.
Maintenance, spares and service life of the ALTAIR Pro
The sensor and battery are replaceable, so the instrument can be kept in service after a sensor reaches end of life. At end of life the unit signals clearly with audible and visual indications, and its event log remains accessible. The log records alarms, alarm clears, calibration and bump results, non-shutdown errors and end-of-life details with time and date, which supports audits and incident reviews. Only CR2 lithium cells of the types named in the manufacturer specification should be used.
Typical ALTAIR Pro applications in Oman and the GCC
In Oman and the GCC the ALTAIR Pro is carried by confined-space teams checking oxygen before entry, by water and desalination technicians handling chlorine dioxide, and by workers in grain, container and fumigation operations where phosphine is a recognised risk. Its small size suits shift workers who already carry radios and tools, and the IP67 case copes with dust and wash-down. In hot conditions keep the unit within its stated operating range of -20 to 50°C.
Information to send with an ALTAIR Pro RFQ
- Target gas and range
- Quantity and carrying accessory (clip, lanyard, hard-hat clip)
- Approval scheme required for the site
- Calibration gas and regulator needs
- Whether alarm set points must differ from the defaults
- Delivery location and date
Documents and quotation
A bid specification for the ALTAIR Pro is attached on this page and covers dimensions, alarms, data logging and approvals. Please read it together with your site gas limits.
Send us the gas, quantity and approval requirement and we will prepare a quotation for the ALTAIR Pro. Seven Star LLC supplies it in Oman and the GCC as an independent supplier.
Other Models in the Msa Altair Portable Range
Seven Star LLC supplies models from the Msa Altair Portable range in Oman and the GCC. Compare the related models below and request a quote for the one that matches your application.
| Model | Category | |
|---|---|---|
| MSA ALTAIR 5X Pumped Multigas Detector (up to 6 gases) | Fire & Gas Detectors | View details |
| MSA ALTAIR Pro Single-Gas Detector (O2, HCN, ClO2, PH3) | Fire & Gas Detectors | You are viewing this model |
Datasheets & Documents
- Datasheet MSA ALTAIR Pro Bid Specification Download
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About brand
MSA Safety is an American maker of safety equipment, founded in 1914 in Pittsburgh by mining engineers John T. Ryan and George H. Deike as Mine Safety Appliances Company, after a series of deadly mine disasters. It first supplied miners with electric cap lamps and breathing apparatus. MSA is headquartered in Cranberry Township, Pennsylvania, and listed on the New York Stock Exchange.
Seven Star LLC supplies MSA gas detectors and accessories in Oman, covering both sides of the product line: ALTAIR portable detectors worn by technicians, and fixed gas monitors such as the ULTIMA X5000 and General Monitors S5000 that feed a fire and gas system.
MSA Safety company profile
| Founded | 1914, Pittsburgh, Pennsylvania, USA |
|---|---|
| Founders | John T. Ryan and George H. Deike |
| Original name | Mine Safety Appliances Company |
| Headquarters | Cranberry Township, Pennsylvania |
| Listing | New York Stock Exchange (MSA) |
| Product families | ALTAIR 4XR and ALTAIR io portable gas detectors, ULTIMA X5000 and General Monitors fixed gas and flame detection, G1 SCBA, V-Gard helmets, V-Series and V-FORM fall protection harnesses and lifelines |
MSA gas detection families listed here
On the portable side, the ALTAIR 4XR is the four-gas detector for combustible gas, oxygen, carbon monoxide and hydrogen sulfide, and the ALTAIR io4 is the connected version that reports readings to a cloud platform. The GALAXY GX2 automated test system handles bump tests and calibration records for ALTAIR instruments.
On the fixed side, the ULTIMA X5000 and General Monitors S5000 are transmitters for combustible, toxic and oxygen sensors. Many installed units still carry the General Monitors name on the nameplate. The Chillgard 5000 is a refrigerant leak monitor for machinery rooms. Small consumables are listed too, such as window cleaning solution 10272-1.
Where MSA gas monitors are used
Fixed MSA gas monitors are found on wellheads, gas plants, refineries, tank farms, LNG and petrochemical units, wherever hydrocarbon or H2S leaks must be alarmed early. Portable ALTAIR detectors go with crews into confined spaces and on hot work permits. Chillgard monitors serve chiller plant rooms in district cooling and large buildings, a common application in the GCC.
MSA Safety products we list
Ordering MSA detectors and sensors: what we need
Fixed gas monitors are configured items. Send the full part number or the configuration code from the nameplate, the target gas and range, the sensor technology (catalytic, infrared, electrochemical), the housing material, the output (4-20 mA with HART, optional relays) and the hazardous area approval required. For portables, state the sensor combination, charger type and regional version. For replacement sensors, a nameplate photo of the transmitter avoids mistakes. We check each code against MSA documentation and propose the manufacturer's current model when an older one is no longer made.
Facts checked against MSA Safety's corporate history and investor materials, October 2026.
Browse MSA Safety products by category: Fire & Gas Detector, Gas Analyzer Accessories, Fire & Gas Systems, Gas Analyzer Systems.
FAQ
Questions about the MSA ALTAIR Pro Single-Gas Detector (O2, HCN, ClO2,
Answers from our engineering team on installation, compatibility and integration.
01Which gases can the ALTAIR Pro measure?
The bid specification lists oxygen (0-25 %), hydrogen cyanide (0-30 ppm), chlorine dioxide (0-1 ppm) and phosphine (0-5 ppm). Each unit carries one sensor, chosen when the instrument is ordered.
02What battery does the ALTAIR Pro use?
It uses one replaceable CR2 lithium battery, and the specification names Energizer, Varta or Panasonic cells. Typical battery life is more than one year, and an icon shows the remaining charge.
03Is the ALTAIR Pro dust and water resistant?
Yes, the case is rated IP67, built from polycarbonate with rubber overmolding. It operates from -20 to 50 degrees C at 10 to 95 percent relative humidity, non-condensing.
04How do I know a bump test was done?
After a successful bump test the display shows a checkmark for 24 hours. The event log also stores the pass or fail result, with date and time, for later audit.
05Can the alarm set points be changed?
Yes. Low, high, STEL and TWA alarms are field adjustable through the MSA infrared link and MSA Link software, or manually before the unit is first switched on.
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