Journal of Theoretical and Applied Physics (JTAP) Industrial application of apodized gas sensor for on-line and in situ measurement of CO and CO2 concentration Volume 14 (2020) Issue 4, August 2020 2023 11 17 Industrial application of apodized gas sensor for on-line and in situ measurement of CO and CO2 concentration 10.1007/s40094-020-00396-z EN Alireza Khorsandi Department of Physics, University of Isfahan, Isfahan 81746‑73441, Iran 0000-0002-9086-718X Saeed Ghavami Sabouri Department of Physics, University of Isfahan, Isfahan 81746‑73441, Iran 0000-0002-6200-4459 Journal Article 2023 11 17 AbstractThe performance of an apodized gas sensor is demonstrated through simultaneous detection of CO and CO2 absorption lines around 1.57 µm in the recuperator channel of a gas-fired industrial furnace at Shahid Montazeri power plant (SMPP) industry. This led to the concentration measurement of targeted molecules as less than ~ 1% and 9.5%, respectively, at atmospheric pressure and 350 °C, indicating close consistency with the reference data reported by SMPP. A minimum detectable absorption of ~ 0.4 × 10−3, corresponding to a detection sensitivity of ~ 4.8 × 10−9 cm−1 Hz−1/2 is measured in this application.