Abstract The current work presents updated measurements of narrow-band transmission for the 2.0, 2.7 and 4.3 μ m bands of CO 2 at temperatures of up to 1550 K. In addition, measurements for the 15 μ m band of CO 2 are also presented for the first time. Data were collected with an improved drop tube design (as compared to the earlier measurements) and an FTIR-spectrometer. The measured data were compared with the CDSD and HITEMP databases, as well as with previous data obtained from the old drop tube apparatus. The new data have less uncertainties at extreme temperatures than the old data and eliminate some of the problems associated with subtraction of the emission signal with the old apparatus. The data show minor discrepancies with the high-resolution databases, particularly with HITEMP at higher temperatures, but in general agreement is good.
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