• A.V. Patil
• P.V.Dalal

This is reviews of gas sensors which applicable and used in electronic systems for detection of toxic and harmful gases to date. Among the environmentally hazardous gases, namely; NO2, NO, N2O, H2S, CO, NH3, CH4, SO2, and CO2. NO2 is the most dangerous gas in terms of Threshold Limit Value (TLV) of 3 ppm. Therefore the appropriate gas sensors have been investigated to measure the low concentration limit of each hazardous gas. Semiconducting metal oxides are the good candidates due to their low cost, high sensitivity, fast response, relatively simplicity of use and ability to detect a large number of gases. Applications of chemical sensors include environmental monitoring, automotive applications, emission monitoring, and aerospace vehicle health monitoring. It also outlines the advantages and disadvantages of each sensor for gas sensing application

Gas sensors, Metal oxides, Semiconductor

" “Gas sensors behaviours and properties "", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 9, page no.a562-a570, September-2022, Available :http://www.jetir.org/papers/JETIR2209057.pdf

" “Gas sensors behaviours and properties "", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 9, page no. ppa562-a570, September-2022, Available at : http://www.jetir.org/papers/JETIR2209057.pdf