The ABB AO2000 LS25 is a high-performance laser gas analyzer module belonging to ABB’s Advance Optima AO2000 integrated analyzer systemeero. It utilizes Tunable Diode Laser Absorption Spectroscopy (TDLAS) technology for continuous, real-time measurement of individual gas component concentrations in industrial process streams. Designed for in-situ or cross-flue installation on process pipelines and flues, it eliminates the need for complex sampling systems, reducing maintenance and measurement errors. This module is widely applied in chemical, power generation, petrochemical, and environmental protection industries, especially for critical applications like ammonia slip (NH₃) monitoring, combustion optimization, and emission control. It supports remote operation via Ethernet and holds certifications for use in hazardous areas.