People cannot live without oxygen all the time, and get oxygen by inhaling air. An adult needs to inhale up to 6500 liters of air a day to get enough oxygen, so polluted air has a direct impact on human health. More than 90% of a person's life is spent indoors, and the impact of indoor air quality on people is even more important. With the continuous development of market economy and science and technology, the development of the construction field is also changing with each passing day. People's requirements for the quality of life are getting higher and higher, and the standards of building decoration and decoration are also increasing, so the phenomenon of indoor air pollution is accompanied.

        VOC, namely volatile organic compounds(Volatile Organic Compounds). Baidu Encyclopedia PairVOCThe description is: "in the form of evaporation at room temperature can exist in the air, its toxicity, irritation, carcinogenicity and special odor, will affect the skin and mucous membranes, acute damage to the human body ...... is an important class of air pollutants." WhenVOCIn the room air to reach a certain concentration, people will begin to feel headache, nausea, limb weakness;If you continue to stay for a long time, it will damage the liver, kidneys, brain and nervous system, and may even cause convulsions, coma, memory loss, and serious consequences.VOCThe harm is so serious, but where does it come from??Experts pointed out that the walls, ceilings, floors and other building materials, as well as latex paint, wallpaper, insulation materials, adhesives and other decorative materials areVOCThe main source. It needs to be pointed out in particular that:Latex paint often used for decorationVOCmainly from raw materials.VOC, including formaldehyde, ammonia, ethylene glycol, etc., so the control of raw materialsVOCContent is crucial!

High concentrations of indoor airVOCSignificantly affects the comfort of the occupants.CO2is tasteless,VOCThe smell is heavy, and most of itVOCIt's unpleasant. In addition, in the airVOCThe effect is not just to make people feel uncomfortable. United States National Environmental Protection Agency(EPA)The website lists short-term and long-term health effects, noting that these effects may be related to indoor air.VOCRelated.EPAThese effects noted include: irritation in the eyes, nose and throat;Headaches, loss of coordination, and nausea;Damage to the liver, kidneys, and central nervous system;Some organisms cause cancer in animals;Some are even suspected or known to cause cancer in humans.

Detection technology is an essential and important technical means for people to understand and transform the world. The sensor is an important tool for the development, acquisition, transmission and processing of information resources in scientific experiments and industrial production activities. A gas sensor is a device or device that can sense the type and concentration of a certain gas in the environment, and can convert its related information into electrical signals to facilitate monitoring, analysis and alarm of the gas to be measured.

Metal oxide semiconductor sensor uses the adsorption of the measured gas,Changing the conductivity of semiconductors,Comparison of changes through current,Excites the alarm circuit. Because the semiconductor sensor measurement is greatly affected by the environment,The output line shape is unstable. metal oxide semiconductor sensor,Because its reaction is very sensitive,Therefore, the current widely used field is the measurement of gas micro-leakage phenomenon.

ForVOCMetal oxides in gas detectionVOCSensor selection can be recommend applicable to usApolloCompany launchedUnited KingdomAlphasensePtype metal oxide sensorVOC-M/P/A31: High sensitivity, high stability, wide range, high cost performance, is the current indoorVOCsCommon qualitative analysis alarm detection scheme in gas monitoring; detectableVOCsThere are many kinds of volatile gases, etc.

VOC-M/P/A31