FTIR stands for Fourier Transform Infrared Spectroscopy. An FTIR gas analyzer detects gaseous compounds by their absorbance of infrared radiation. Because each molecular structure has a unique combination of atoms, each produces a unique infrared spectrum. From this, identification (Qualitative analysis) and analysis (Quantitative measurement) of the gaseous compounds is possible. An FTIR analyzer simultaneously measures multiple analytes in a complex gas matrix, detecting virtually all gas-phase species (both organic and inorganic). The corrosion resistant sample cell is heated to 195 C, which ensures that the sample stays in gaseous phase even with high concentrations of H2O or corrosive gases. This system utilizes hot-and-wet measurement principle (no drying or dilution), which ensures that the analysis is done with a representative sample. Just a single analyzer can be used to measure almost all criteria pollutants. Some key benefits of the FTIR measuring system include:

  • Very low need for calibrations – no span calibrations needed
  • All measurement data is stored on a computer, allowing full post- measurement processing of the data
  • The same system can be used in many different applications, due to the expandability of the system