A gas sensor is basically electronic sensor device that can find out if some gases are around and how much of them there are in the air. It turns the chemical reactions between the gas it’s looking for and a special material into an electrical signal. You usually see these sensors used to keep an eye on air quality, find dangerous gases, and help keep things safe in places like mines,... https://www.campuscomponent.com/blogs/post/what-is-gas-sensors-working-types-and-applications