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MSA™ ALTAIR™ Pro Single-Gas Detector

Sensor and battery replacement options give this instrument an indefinite service life

Manufacturer:  MSA™ 10074137

 View more versions of this product

Catalog No. 19-165-558



Features superior dust and water protection, excellent impact resistance, great RFI performance, single-button access to any function, and an extremely effective alarm system.

  • Highly accurate electrochemical sensors measure concentrations of toxic gas or percent oxygen
  • Information displays on large, clear backlit LCD
  • System automatically records the last 50 alarm or test events; active datalogging records peak value every three minutes
  • Triple alarm system consists of two bright flashing LEDs, a piercing audible alarm, and internal vibrating alarm
  • Adjustable alarm setpoints are offered for LOW and HIGH levels on all units; toxic gas versions also have TWA and STEL alarm points
  • Rubberized armor housing resists dust, water and impact
  • Built-in IR communication port connects detector to MSA infrared adapter to read data or change alarm setpoints
  • Built-in gas delivery adapter for gas response tests
  • Functions in a temperature range of -4° to +122°F (-20° to +50°C); relative humidity, 10 to 95%

Order Info

Dimensions (L x W x H): 1 x 2 x 3.4 in. (2.5 x 5.1 x 8.6cm). Weight (including clip): 4 oz. (113g).


Rugged housing is IP67 rated for ingress protection. Classified as Intrinsically Safe for use in hazardous locations in the U.S. and Canada (Class I, Groups A, B, C, D; Class II, Group G); ATEX, II 2 G EEx ia II C T4.


Two-year manufacturer's warranty on instrument and listed sensors; two years from date of first use or 30 months from date of manufacture, whichever comes first



3.4 x 2 x 1 in. (8.63 x 5.08 x 2.54cm)
-20° to +50°C
Audible, visual, vibrating
4 oz.
2 in.
-4° to +122°F
2 Years
1 in.
10 to 95%
3.4 in.
0 to 25%