Pollution gas produced by commercial public indoor activities: 

The public environment is relatively densely populated and the exhaled gas exchange rate between people is high. The polluted gas formed by poor air mobility is the most serious, but at the same time it provides favorable conditions for the spread of the virus.

The indoor air pollution in the commercial environment mainly comes from decoration materials, cooker hoods in Restaurants, HCHO and disinfectants in medical institutes and CO in public transportation.

Decoration materials, spray paints and their solvents, wood preservatives, plywood, etc. can release a variety of volatile organic substances such as benzene, toluene, formaldehyde, phenols, xylene at room temperature. Commercial wastes are NH3 ammonia, sulfide, amines. Medical wastes mainly carry viral germs.

Through monitoring the air pollution index, ECnose can understand the pollution situation in the public indoor environment in real time, accurately and effectively adopt an air pollution control and create a healthy and comfortable environment for everyone.