Low cost PM sensors; are they suitable for measuring subtle particle variations in ambient or indoor air?

Researchers are increasingly interested in the use of low-cost sensors to understand high resolution spatial distributions of PM; something where use of more expensive equipment is often less plausible. Currently many projects aim to develop these sensors to provide an appropriate way to supplement high quality fixed site data with lower quality high spatial distribution data (Mead et al., 2013; Popoola et al., 2018).

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