The accuracy of the most popular cheap air quality

2022-08-05
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Two atmospheric chemists from the National Center for atmospheric science at York University in the United Kingdom commented on the journal Nature on July 7, questioning the accuracy of the cheap air pollution detection device and calling on the government and regulatory agencies to strengthen management and issue corresponding standards as soon as possible

according to the article, the public's concern about making the pressure in the compressor system too high than air pollution has promoted the prosperity of the air quality detector market. Many companies have launched air particle or nitrogen oxide detection products for personal or household use. The price is only tens of dollars, far lower than the price of thousands of dollars for traditional air detection devices. However, most of these devices are based on relatively old technologies, such as those used in smoke alarms. The effectiveness of detecting a small amount of air pollutants has not been confirmed in calculating engineering stress. In laboratory and field experiments, they found that the readings of these low-cost equipment are very vulnerable to changes in water vapor, carbon dioxide, hydrogen, temperature, humidity and wind. In contrast, mainstream air quality testing equipment does not have these problems and is more reliable in reading

Alastair Lewis and Peter Edwards of the National Center for atmospheric science of York University in the UK, who are responsible for this study, said that these cheap personal air pollution detection devices have rarely been strictly tested, and there is no corresponding standard. 7.4.2 the sampling quantity is managed and standardized according to table 4. "At this point, research institutions and regulators have fallen behind." The article published in the journal Nature said

scientists from York University said that after a large number of these cheap devices enter the public domain, "a large number of untested and suspicious data will become a worry for the heads of air quality management agencies". Because "people may sue local governments for the readings on their equipment"

therefore, they called on the government and regulatory agencies to issue corresponding standards as soon as possible. Large brands deserve the consideration of the majority of users to bring these cheap air quality detection devices into a unified regulatory system

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