20.500.12556/DiRROS-23638 Can low-cost sensors (LCS) enhance air quality monitoring for personal pollution exposure assessment? Laboratory and field assessments of low-cost sensors (LCS) are essential for ensuring the accuracy of PM2.5 measurements collected by citizens in air quality campaigns. Evaluation of Sensirion SPS30 (LCS SPS30) in controlled laboratory setting showed a coefficient of determination (R2) ranging from 0.81–0.99 and a root mean square error (RMSE) from 0.81–61.72 μg m−3, at average concentration of 21.5 μg m−3. In contrast, co-location assessment at an average concentration of 9 μg m−3 resulted in R2 of 0.5 and a RMSE of 6.82 μg m−3. The results demonstrated that the sensor met micro-environmental monitoring standards (accuracy < 25%) and United States Environmental Protection Agency's performance criteria (RMSE ≤ 7 μg m−3, R2 > 0.7) only at relative humidity (RH) levels below 60%, emphasising its strong sensitivity to RH and the need for RH-dependent data corrections. The observed underestimation or overestimation of PM2.5 readings was primarily attributed to variations in particle composition and concentration. Despite accuracy variations, LCSs can effectively capture spatiotemporal urban air quality patterns and identify pollution hotspots in community monitoring, particularly in low-pollution environments. In a citizen-led PM2.5 monitoring campaign in Maribor, Slovenia, the lowest concentrations were recorded at 15:00 (2.9 μg m−3), while the highest occurred during the morning rush-hour (4.8 μg m−3), likely attributed to the planetary boundary layer’s impact on atmospheric particulate dispersion. Spatial analysis revealed that hotspots clustered near intersections, where vehicle waiting time is the longest. particulate matter low-cost sensor Sensirion SPS30 citizen science calibration trdni delci nizko-cenovni senzor Sensirion SPS30 občanska znanost kalibracija true false true IOP Publishing Angleški jezik Slovenski jezik © 2025 The Author(s) Neznano 2025-09-18 07:45:00 2025-09-18 08:10:39 2025-10-24 03:54:43 0000-00-00 00:00:00 2025 0 0 str. 1-11 no. 9, [article no.] 095007 Vol. 7 Sep. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2025-09-11 54 2515-7620 10.1088/2515-7620/ae02ef 248664323 https://doi.org/10.1088/2515-7620/ae02ef 0 9fe97ae8-9452-11f0-9bb7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=34982 RAZ_Ilenic_Anja_2025.docx RAZ_Ilenic_Anja_2025.docx 1 271FF99E3B8CE21D3E6F2D1FCCAEB1D6 a0c00382f75b4f54dc6e6f9d705be7ea316653c734a5ef603c8ad83499bc76a8 1cb9804a-9456-11f0-9bb7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=34983 RAZ_Ilenic_Anja_2025.pdf RAZ_Ilenic_Anja_2025.pdf 1 751265314F474A5CDC907509EF62F687 72477e8414b851a7949430a7c4426b069dc358d561dda9257c072bf84a6c9743 2b53ee55-9456-11f0-9bb7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=34984 Zavod za gradbeništvo Slovenije 0 0 0