Gas sensors are devices designed to detect and measure the concentration of gases in the surrounding environment. These sensors utilize different sensing technologies, including electrochemical, semiconductor, and optical principles, to detect specific gases or analyze gas mixtures. Gas sensors find applications in various industries, including automotive, environmental monitoring, industrial safety, and indoor air quality monitoring. They are used for tasks such as gas leak detection, emissions monitoring, indoor air quality assessment, and process control. Gas sensors offer advantages such as sensitivity, selectivity, and real-time monitoring capabilities, enabling early detection of gas leaks or environmental hazards and ensuring safety and environmental compliance.