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The status of air quality  Environmental pollution has always been a problem that cannot be postponed in China, and among these numerous environmental pollutions, air pollution is the most serious, so the detection of air quality is particularly important. At present, China is facing pollution of smoke from burning coal and photochemical smog, and air pollution is the main environmental pollution. Relevant experts in China have found that the air contains a lot of organic compounds, including...

Sources of indoor dust particles Studies have found that various living and office activities such as housework, walking, cooking, smoking, printing, and copying will increase the concentration of indoor dust particles. Various microorganisms that breed from people, pets, the surface of various indoor building materials, and the indoor environment are also sources of indoor particulate matter.   1) In the cooking process, 4.1±1.6mg of inhalable particulate matter is produced per minute,...

With the invasion of smog, dust and industrial waste gas, the quality of air is becoming more and more serious, and it is imperative to improve indoor air monitoring. In recent years, the national air quality has deteriorated, and people are paying more and more attention to the quality of air to take necessary measures in a timely manner, especially those living in densely populated areas of big cities.   CO2 sensors We all know that the content of carbon dioxide is a concern of many people....

The infrared light source radiates infrared light (Io), and after being absorbed by the gas such as CO2 to be detected in the gas chamber, the intensity of the infrared light reaching the infrared detector will decrease (I), and the C02 molecule will absorb the infrared light with a wavelength of 4.26um. Determine the values of constant parameters such as I0, u, L and the functional relationship between I and C, and then calculate the concentration C of the gas by collecting the corresponding values...

An atmospheric particle refers to particles with extremely small particle sizes, which is one of the most important factors affecting the climate and the environment in which human beings live. Industrial production and human activities are the main reasons for the increase in the concentration of atmospheric particles caused by the pollution of the atmospheric environment. The use of coal in China's energy consumption exceeds 70%. As the main energy source in China, the air pollution caused...

To verify the advantages of the proposed system detector in terms of efficiency, accuracy and comprehensive error of sensors, a simulation comparison experiment was carried out, and a comprehensive comparison was made between the intelligent sensors and the traditional sensor based on electrochemical methods and weighing methods. First, based on the three designs, 10 groups of comparative experiments were carried out under different degrees of air pollution, and the detection efficiency of various...

With the progress of industrialization, the scale of heavily polluting industries such as petroleum, chemical industry, electric power, and metallurgy continues to expand, and the related sewage treatment doesn’t meet the standard, resulting in an intensified trend of overall air pollution. Heating in winter in northern regions and the rapidly increasing number of motor vehicles has caused an increase in the concentration of particulate matter in the atmosphere. PM2.5 is fine particulate matter...

According to the standards of the Ministry of Environmental Protection of the People's Republic of China, all factories that produce fodder, cement, flour, wood and others need to use laser dust sensors. A dust sensor, as the name suggests, is an instrument for detecting the concentration of dust. It can be classified into PM2.5 sensors, PM10 sensors and TSP full dust sensors according to different sizes of dust.   Because the laser dust sensor can monitor the dust concentration in the...

Working underground in coal mines is dangerous, and there is a certain amount of productive dust in it. If it cannot be detected and treated in time, there may be different degrees of health hazards. The main rapid detection methods for dust are light scattering, β-ray, micro-weight balance, electrostatic induction and piezoelectric balance. Among them, the instrument of micro-weight balance is monopolized by a few American companies, with high prices and high maintenance costs; the instrument...