Abstract: Chlorodifluoromethane and difluoromonochloromethane is a Hydro-Fluoro-Chloro-Carbon (HCFC). It is a colourless gas and is better known as HCFC-22 or R-22. It is used as a refrigerant in medium and low temperature commercial and industrial refrigeration and freezer rooms, and also in cold stores, cabinets, water chillers and process cooling. R-22 is often used as an alternative to the highly ozone depleting R-11 and R-12 because of its relatively low ozone depletion potential of 0.055 among the lowest of chlorine containing halo-alkanes. In this paper, we propose a system to detect the leakage of R-22 in domestic and industrial refrigeration applications. We have proposed a low cost, portable and wireless detection system using android application and automated responses to cease the leakage of refrigerant.

Keywords: Chlorodifluoromethane, difluoromonochloromethane, Hydro-Fluoro-Chloro-Carbon (HCFC), HCFC-22, R-22, R-11, R-12, halo-alkanes, portable, wireless detection system, android application, automated responses.