Multi-gas Infra Red Fourier Transform (FTIR) single analyzer for the measurement of multiple gases: NO, NO₂, NO_X, N₂O, CO, CO₂, SO₂, HCl, HF, CH₄, TOC, NH₃, H₂O, O₂. The MIR FT multi-gas FTIR analyzer is especially designed for wet and corrosive sample gases.