Application of Sulfur Dioxide Sensors in Polluted Gas Emission Detection

The Continuous Emission Monitoring System (CEMS) is mainly used for continuous monitoring of various industrial waste gas sources, including thermal power plants, waste incineration plants, coal and petrochemical plants, paper mills and other industries.

As air pollution becomes increasingly severe, governments have strengthened supervision over waste gas emissions from factories and enterprises. CEMS is relied on to monitor flue gas emissions of factories and verify compliance with emission standards. CEMS serves two core functions: detecting the concentration of solid particulate matter and the content of polluting gases. Among these pollutants, sulfur dioxide (SO₂) causes substantial harm to the environment, which requires sulfur dioxide sensors for concentration measurement.

CEMS consists of four major parts: the gaseous pollutant monitoring subsystem, the particulate matter concentration monitoring subsystem, the emission flow parameter monitoring subsystem, and the data acquisition, processing and communication system. The monitoring of sulfur dioxide falls under the gaseous pollutant monitoring subsystem. The sulfur dioxide sensor measures SO₂ content in treated waste gas to judge whether the emission meets relevant standards and whether further desulfurization is needed. Meanwhile, the measurement data from the sensor provides a reference for subsequent treatment and helps improve desulfurization efficiency.

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