A gas sensor, also known as a gas detector or gas analyzer, is a device used to detect and measure the presence and concentration of various gases in the surrounding environment. Gas sensors are widely used in industrial settings, environmental monitoring, safety applications, and indoor air quality assessment.An electrochemical gas sensor is a type of gas sensor that uses an electrochemical reaction to detect and measure the concentration of specific gases in the surrounding environment. Electrochemical gas sensors are commonly used in industrial and safety applications, as well as in environmental monitoring and indoor air quality assessment.