Application of Sulfur Dioxide Gas Sensors in Flue Gas Emission Detection

Continuous Emission Monitoring System (CEMS) is mainly applied to the continuous monitoring of various industrial flue gas emission 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 tightened supervision on waste gas emissions from factories and enterprises. CEMS is essential for monitoring flue gas emissions of factories and verifying compliance with emission standards. It serves two core functions: detecting the concentration of particulate matter and the content of pollutant 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: gaseous pollutant monitoring subsystem, particulate matter concentration monitoring subsystem, emission flow parameter monitoring subsystem, and data acquisition, processing and communication subsystem. The detection of sulfur dioxide falls into the gaseous pollutant monitoring subsystem. The sulfur dioxide gas sensor measures SO₂ concentration in treated flue gas to judge whether the emission meets standards and whether further desulfurization is needed. Meanwhile, the measured data provides a reliable basis for subsequent treatment and helps improve desulfurization efficiency.

Shenzhen Wuliang Sensor Technology Co., Ltd. recommends the GS+4SO₂ high-resolution sulfur dioxide sensor. Capable of detecting SO₂ at concentrations as low as 20 ppm, it is well-suited for ambient air quality monitoring systems and related instruments.