A Review on Gas Sensor Technology and Its Applications

Gas sensors have drawn the researchers’ community’s attention for a few decades due to their numerous applications in different areas of environmental monitoring, biomedical devices, and pharma industries, etc. Normally gas sensing research includes polymers, metal-oxide-based semiconducting materials, porous silicon, etc. The performance of gas sensors is characterized by considering various scientific parameters, such as its sensitivity, lowest detection value, response time, recovery time, selectivity, and working temperature. Polymers are known for their sensitive thermal, electrical, mechanical, and dielectric properties. Due to such characteristics, they have gained a wide interest in theoretical research as well as practical applications in sensor technology and devices. This paper reveals a wide research review about the gas sensor structure as a sensing device in the field of the sensor. In the end, the current status, future perspectives as well as advantages of particular polymer-based sensors are summarized.