The ABB AO2000 LS25 is a laser gas analyzer module designed for continuous measurement of the concentration of individual components in a gas mixture6. It is based on the principle of tunable diode laser absorption spectroscopy (TDLAS)5. A single – mode diode laser operating at room temperature scans the corresponding absorption lines, and it can automatically correct for pressure and temperature changes5. It is a non – intrusive measurement technique that does not require contact with the gas sample8. This module is part of the Advance Optima series and can be combined with other analyzer modules, being fully remotely controlled by the AO2000 central processing unit and running in an Ethernet – based network5. It has a modular design, which allows for easy combination into customized solutions and enables upgrades or expansions with new functions at any time5. It is suitable for a wide range of applications, including emissions monitoring, process control, and safety monitoring in industries such as chemical, environmental protection, energy, food, and pharmaceuticals59.