Non-Dispersive Infrared (NDIR) Analyzers


  • Ch4
  • Co
  • Co2
  • No
  • O2
  • So2

CAI offers two analyzer models that use Non-Dispersive Infrared (NDIR) technology to measure the concentrations of IR-absorbing gases in a sample. The 600 and ZPA models utilize paramagnetic or fuel cell technology to measure Oxygen. 

  • 600 NDIR/O2 – Up to 3 IR channels or 2 IR channels + O2
  • ZPA NDIR/O2 – Up to 4 IR channels (including SO2, NOx) + O2

CAI NDIR analyzers’ measurements are based on the infrared absorption characteristics of gases. Using a single infrared beam to measure gas concentrations, they deliver highly stable and reliable results. CAI NDIR analyzers are well-suited for a wide range of applications, including:

  • Stack gases (CEM)
  • Vehicle emissions
  • Combustion efficiency
  • Turbine/generator feedback control
  • Process chemical gas analysis
  • Fuel cell analysis
  • Personnel safety

600 NDIR/O2 Analyzer Highlights

  • Accurate analysis of IR-absorbing gases
  • Measure from low ppm to 100% full scale
  • Rapid response time
  • Internal sample pump
  • Optional Model 600 P/F – Oxygen analyzer with no NDIR gases

ZPA NDIR/O2 Analyzer Highlights

  • Up to four IR channels plus Oxygen
  • Measures from low ppm to % concentrations
  • One or two ranges per component
  • Virtually unaffected by moisture interference
  • Optional external NOx converter