Online Monitoring of Sulfur Dioxide (SO₂) Concentration in Flue Gas Emissions

Continuous Emission Monitoring System (CEMS) is mainly applied to continuous monitoring of various industrial exhaust sources, including thermal power plants, waste incineration plants, coal and petrochemical factories, paper mills and other industries.

With the increasingly severe atmospheric pollution, governments have strengthened supervision over exhaust emissions from factories and enterprises. CEMS serves as the core facility to monitor flue gas discharge and verify compliance with emission standards. It features two core detection functions: solid particulate matter concentration measurement and pollutant gas content analysis. Sulfur dioxide (SO₂) is a highly environmentally harmful pollutant, which requires professional sulfur dioxide sensors for concentration detection.

CEMS consists of gaseous pollutant monitoring subsystem, particulate matter concentration monitoring subsystem, emission flow parameter monitoring subsystem, as well as data acquisition, processing and communication system. Sulfur dioxide detection falls under the gaseous pollutant monitoring subsystem. The SO₂ sensor measures sulfur dioxide content in treated exhaust gas to judge emission compliance and determine the necessity of further desulfurization treatment. Its detection data also provides factual basis for subsequent treatment and effectively improves desulfurization efficiency.

Trace sulfur dioxide monitoring for air quality, sulfur dioxide gas transmitters