The ‌ABB EL3020‌ is a next-generation continuous emissions monitoring system (CEMS) within ABB’s EasyLine series, designed for precise O₂ and combustibles measurement in industrial processes. This laser-based analyzer combines tunable diode laser absorption spectroscopy (TDLAS) with advanced signal processing, achieving ±0.2% O₂ accuracy at 650°C flue gas temperatures. The ‌EL3020‌’s modular design allows simultaneous measurement of up to 4 gas components, including optional CO and NOx detection modules.