Continuous Emissions Monitoring Systems (CEMS)

Continuous Emissions Monitoring Systems (CEMS) are integrated monitoring systems that continuously measure and record pollutant emissions from industrial sources such as power plants, refineries, cement facilities, and manufacturing operations. Using analyzers installed directly in exhaust stacks or ducts, CEMS tracks pollutants including sulfur dioxide (SO₂), nitrogen oxides (NOx), carbon monoxide (CO), carbon dioxide (CO₂), particulate matter, and oxygen levels in real time. CEMS are widely used for environmental regulatory compliance, emissions reporting, operational control, and air-quality management, and are often mandated by environmental authorities for high-emitting industrial facilities.