Combustion Gas Analyzer


BTU4400-NOx is a portable flue gas analyzer designed for emissions monitoring and maintenance & tuning of combustion processes. Its rugged design and “true NOx” capability makes the 4400 the ideal industrial analyzer for boiler, engine, furnace, and other combustion applications.   

The BTU4400-NOx Includes: 

  • Up To FOUR Gas Sensors: O2, CO, NO, & NO2  or  O2, CO, NO, & SO2 
  • Built-In Printer (non-thermal)
  • Unbreakable Metal Hose Connectors
  • Temperature & Pressure Measurements
  • Rechargeable Lithium Ion Battery Pack
  • Internal Data Memory (900 Tests)
  • PC Software With USB Communications Cable
  • 16 Selectable Fuel/Oil Types


  • “true NOx” capability
  • Up To four Gas Sensors
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