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. 2021 Jun 17;21(12):4146. doi: 10.3390/s21124146

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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The mass concentrations (µg/m³) of (a) PM₁, (b) PM_2.5mc, and (c) PM₁₀ reported by the sensors plotted against the reference device for the ARD environmental experiment.

The mass concentrations (µg/m³) of (a) PM₁, (b) PM_2.5mc, and (c) PM₁₀ reported by the sensors plotted against the reference device for the ARD environmental experiment.