ISO 21111-4:2020

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ISO 21111-4:2020 specifies performance testing methods for particulate matter measurement devices in indoor air quality monitoring. It ensures that these devices are accurate, reliable, and consistent, helping to improve indoor air quality and protect public health from the harmful effects of particulate pollution.

ISO 21111-4:2020 is the fourth part of the ISO 21111 series, which focuses on the performance testing of indoor air quality (IAQ) monitoring instruments. This particular part provides guidelines for evaluating the performance of devices used to measure particulate matter (PM) in indoor air. Particulate matter is a critical component of IAQ monitoring, as it can have significant health impacts.