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What gases can VOC/air quality detection sensors detect?

2021-05-14 17:21 VOCs are common in the indoor and outdoor ambient air. In the outdoor environment, they mainly come from the industrial waste gas, solvent volatilization, automobile exhaust, photochemical pollution and secondary reaction products produced by petrochemical industry, transportation, natural fuel combustion, etc.; The interior is mainly from the building and home decoration materials such as latex paint, wallpaper, binder, and household appliances, spontaneous combustion gas and cooking. VOCs pollutants themselves have certain toxicity, irritation and special smell, and will have a huge impact on human health when they reach a certain concentration in indoor air.

When evaluating indoor air quality, there is an important index VOC, namely Volatile Organic Compounds (VOCs). The U.S. Environmental Protection Agency (EPA) defines VOC as any carbon compound that participates in photochemical reactions in the atmosphere, other than carbon monoxide, carbon dioxide, carbonic acid, metallic carbides, carbonates, and ammonium carbonate.
So the more people know about VOC, the more nervous they become about it. It can be predicted that in the future indoor air quality assessment, the demand for VOC monitoring will be more and more. This will undoubtedly lead to more market opportunities for VOC sensors.

With the improvement of people's requirements for environmental air quality, the demand and requirements for portable online gas sensor detector with excellent performance are becoming higher and higher. A perfect VOC gas sensor should have the following characteristics:

(1) Good selectivity, and can have obvious response characteristics to the measured gas in the environment where a variety of gases coexist;
(2) High sensitivity, with wide detection range and low detection limit;
(3) Fast signal response and recovery speed, and good reversibility;
(4) strong anti-electromagnetic interference ability, good reproducibility and stability, with a long storage and service life;
(5) Simple structure, low consumption and low price, easy to use and maintenance;
(6) Small and portable, intelligent and multi-functional, easy to online field analysis.
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