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Altair Pro Single Oxygen and Toxic Gas Detector



Option for detect below gases:

  • MSA ALTAIR Pro detect CO
  • MSA ALTAIR Pro detect H2S
  • MSA ALTAIR Pro detect O2
  • MSA ALTAIR Pro detect NH3
  • MSA ALTAIR Pro detect Cl2
  • MSA ALTAIR Pro detect ClO2
  • MSA ALTAIR Pro detect NO2
  • MSA ALTAIR Pro detect SO2
  • MSA ALTAIR Pro detect HCN
  • MSA ALTAIR Pro detect PH3

Based on the industry-standard ALTAIR Single-Gas Detector—but with added features and functionality—ALTAIR Pro toxic gas and oxygen detectors combine reliable detection and LED/audible/flashing/vibrating alarms with clear, backlit LCD displays. Electrochemical sensors measure concentrations of toxic gas (chlorine dioxide, hydrogen cyanide and phosphine) or percent oxygen. Purpose-built for superior dust and water protection, excellent impact resistance and excellent RFI performance.


  • Unit detects O2, ClO2, HCN and PH3
  • Gas concentration (chlorine dioxide, hydrogen cyanide and phosphine) or percent oxygen displayed on a large, clear, backlit LCD
  • Automatically records the last 50 alarm/test events while simultaneously recording peak gas readings or low O2 readings every three minutes in a periodic data log
  • User can read data or change alarm set points by connecting unit to MSA Link via built-in IR communication port
  • Adjustable alarm set points
  • No-miss quad alarm system includes bright flashing LEDs, piercing audible alarm, LCD notification, and an internal vibrating alarm
  • Rubberized armor housing and one-button operation for maximum durability and simplicity
  • Easy alarm check, bump check, fresh air zero, and calibration
  • Easily replaceable batteries and sensors
  • Markets: Contractor, Contractor, Industrial, Mining, Oil & Gas, Utilities
  • Applications: Toxic Detection, Oxygen Detection


Technical Specification

Weight 4.0 oz including clip
Dimensions 3.4” x 2.0” x 1.0”
Operating Temperature Range -20 to +50ºC (-4 to +122ºF)
Humidity 10-95% RH non-condensing
Gases & Measuring Ranges Gas Range Resolution
Oxygen 0-25% by vol 0.1 Vol.%
Carbon monoxide 0-1500 PPM 1 PPM
Hydrogen sulfide 0-200 PPM 1 PPM
Hydrogen cyanide 0-30 PPM 0.5 PPM
Chlorine 0-20 PPM 0.1 PPM
Chlorine dioxide 0-1.00 PPM 0.02 PPM
Sulfur dioxide 0-20 PPM 0.1 PPM
Nitrogen dioxide 0-20 PPM 0.1 PPM
Ammonia 0-100 PPM 1 PPM
Phosphine 0-5.00 PPM 0.05 PPM
Remote oxygen (O2-R) 0-25% by vol 0.1Vol.%
Alarms Average > 95 dB @ 1 ft, bright LEDs, vibrating alarm standard
Warranty See instruction manual for full warranty information
Instrument life Indefinite with sensor and battery replacement as needed
Battery CR2 lithium camera battery (9000 hour installed life – typical)
Case Polycarbonate with rubberized shell
Display Large LCD with backlight
Ingress Protection IP67 (except O2-R is IP54)
Data Logging 50 latest events in session log
Peak value every 3 minutes in periodic log
Certifications US and Canada: Class I, Div. 1, Groups A, B, C and D; Class II, Div. 1, Group G / Europe: Ex ia IIC T4 / USA: AEx ia IIC T4 / European Union: ATEX II 2G Ex ia IIC T4 / Australia: Ex ia IIC T4 (Ta = 50°C)




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