{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,26]],"date-time":"2025-11-26T16:27:00Z","timestamp":1764174420632,"version":"build-2065373602"},"reference-count":34,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2017,12,15]],"date-time":"2017-12-15T00:00:00Z","timestamp":1513296000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Inexpensive aerosol sensors have been considered as a complementary option to address the issue of expensive but low spatial coverage air quality monitoring networks. However, the accuracy and response characteristics of these sensors is poorly documented. In this study, inexpensive Shinyei PPD42NS and PPD60PV sensors were evaluated using a novel laboratory evaluation method. A continuously changing monodisperse size distribution of particles was generated using a Vibrating Orifice Aerosol Generator. Furthermore, the laboratory results were validated in a field experiment. The laboratory tests showed that both of the sensors responded to particulate mass (PM) concentration stimulus, rather than number concentration. The highest detection efficiency for the PPD42NS was within particle size range of 2.5\u20134 \u00b5m, and the respective optimal size range for the PPD60PV was 0.7\u20131 \u00b5m. The field test yielded high PM correlations (R2 = 0.962 and R2 = 0.986) for viable detection ranges of 1.6\u20135 and 0.3\u20131.6 \u00b5m, when compared to a medium cost optical dust monitor. As the size distribution of atmospheric particles tends to be bimodal, it is likely that indicatively valid results could be obtained for the PM10\u20132.5 size fraction (particulate mass in size range 2.5\u201310 \u00b5m) with the PPD42NS sensor. Respectively, the PPD60PV could possibly be used to measure the PM2.5 size fraction (particulate mass in size below 2.5 \u00b5m).<\/jats:p>","DOI":"10.3390\/s17122915","type":"journal-article","created":{"date-parts":[[2017,12,15]],"date-time":"2017-12-15T12:23:56Z","timestamp":1513340636000},"page":"2915","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Response Characterization of an Inexpensive Aerosol Sensor"],"prefix":"10.3390","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3270-5972","authenticated-orcid":false,"given":"Joel","family":"Kuula","sequence":"first","affiliation":[{"name":"Finnish Meteorological Institue, Erik Palmenin aukio 1, FIN-00560 Helsinki, Finland"}]},{"given":"Timo","family":"M\u00e4kel\u00e4","sequence":"additional","affiliation":[{"name":"Finnish Meteorological Institue, Erik Palmenin aukio 1, FIN-00560 Helsinki, Finland"}]},{"given":"Risto","family":"Hillamo","sequence":"additional","affiliation":[{"name":"Finnish Meteorological Institue, Erik Palmenin aukio 1, FIN-00560 Helsinki, Finland"}]},{"given":"Hilkka","family":"Timonen","sequence":"additional","affiliation":[{"name":"Finnish Meteorological Institue, Erik Palmenin aukio 1, FIN-00560 Helsinki, Finland"}]}],"member":"1968","published-online":{"date-parts":[[2017,12,15]]},"reference":[{"key":"ref_1","unstructured":"Official Journal of the European Union (2008). Directive 2008\/50\/EC of the European Parliament and the Council of 21 May 2008 on Ambient Air Quality and Cleaner Air for Europe, Official Journal of the European Union."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"10","DOI":"10.1016\/j.atmosenv.2015.04.057","article-title":"Source Attribution of Air Pollution by Spatial Scale Separation using High Spatial Density Networks of Low Cost Air Quality Sensors","volume":"113","author":"Heimann","year":"2015","journal-title":"Atmos. Environ."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"537","DOI":"10.1016\/j.scitotenv.2014.09.059","article-title":"On the Feasibility of Measuring Urban Air Pollution by Wireless Distributed Sensor Networks","volume":"502","author":"Moltchanov","year":"2015","journal-title":"Sci. Total Environ."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Rajasegarar, S., Zhang, P., Zhou, Y., Karunasekera, S., Leckie, C., and Palaniswami, M. (2014, January 21\u201324). High Resolution Spatio-Temporal Monitoring of Air Pollutants using Wireless Sensor Networks. Proceedings of the 2014 IEEE Ninth International Conference on Intelligent Sensors, Sensor Networks and Information Processing (ISSNIP), Singapore.","DOI":"10.1109\/ISSNIP.2014.6827607"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"286","DOI":"10.1016\/j.envres.2017.04.023","article-title":"Validating Novel Air Pollution Sensors to Improve Exposure Estimates for Epidemiological Analyses and Citizen Science","volume":"158","author":"Jerrett","year":"2017","journal-title":"Environ. Res."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"1121","DOI":"10.5194\/amt-7-1121-2014","article-title":"Field Calibrations of a Low-Cost Aerosol Sensor at a Regulatory Monitoring Site in California","volume":"7","author":"Holstius","year":"2014","journal-title":"Atmos. Meas. Tech."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"5281","DOI":"10.5194\/amt-9-5281-2016","article-title":"Community Air Sensor Network (CAIRSENSE) Project: Evaluation of Low-Cost Sensor Performance in a Suburban Environment in the Southeastern United States","volume":"9","author":"Jiao","year":"2016","journal-title":"Atmos. Meas. Tech."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"56","DOI":"10.1016\/j.envpol.2015.01.013","article-title":"A Distributed Network of Low-Cost Continuous Reading Sensors to Measure Spatiotemporal Variations of PM2.5 in Xi\u2019an, China","volume":"199","author":"Gao","year":"2015","journal-title":"Environ. Pollut."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"691","DOI":"10.1016\/j.scitotenv.2017.06.266","article-title":"End-User Perspective of Low-Cost Sensors for Outdoor Air Pollution Monitoring","volume":"607","author":"Rai","year":"2017","journal-title":"Sci. Total Environ."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"199","DOI":"10.1016\/j.envint.2014.11.019","article-title":"The Rise of Low-Cost Sensing for Managing Air Pollution in Cities","volume":"75","author":"Kumar","year":"2015","journal-title":"Environ. Int."},{"key":"ref_11","unstructured":"Baron, P.A., and Willeke, K. (2001). Aerosol Measurement: Principles, Techniques, and Applications, Wiley. [2nd ed.]."},{"key":"ref_12","unstructured":"Hinds, W.C. (1999). Aerosol Technology: Properties, Behaviour, and Measurement of Airborne Particles, Wiley. [2nd ed.]."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"491","DOI":"10.1016\/j.envpol.2016.12.039","article-title":"Ambient and Laboratory Evaluation of a Low-Cost Particulate Matter Sensor","volume":"221","author":"Kelly","year":"2017","journal-title":"Environ. Pollut."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"1063","DOI":"10.1080\/02786826.2015.1100710","article-title":"Laboratory Evaluation and Calibration of Three Low-Cost Particle Sensors for Particulate Matter Measurement","volume":"49","author":"Wang","year":"2015","journal-title":"Aerosol Sci. Technol."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"462","DOI":"10.1080\/02786826.2016.1162901","article-title":"Inter-Comparison of Low-Cost Sensors for Measuring the Mass Concentration of Occupational Aerosols","volume":"50","author":"Sousan","year":"2016","journal-title":"Aerosol Sci. Technol."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1352","DOI":"10.1080\/02786826.2016.1232859","article-title":"Evaluation of the Alphasense Optical Particle Counter (OPC-N2) and the Grimm Portable Aerosol Spectrometer (PAS-1.108)","volume":"50","author":"Sousan","year":"2016","journal-title":"Aerosol Sci. Technol."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"24","DOI":"10.1016\/j.jaerosci.2016.11.010","article-title":"Evaluation of New Low-Cost Particle Monitors for PM2.5 Concentrations Measurements","volume":"105","author":"Zikova","year":"2017","journal-title":"J. Aerosol Sci."},{"key":"ref_18","unstructured":"Shinyei Technology Co., Ltd. (2010). Technical Specifications Sheet: PPD42NS, Shinyei Technology Co., Ltd."},{"key":"ref_19","unstructured":"Shinyei Technology Co., Ltd. (2010). Technicial Specifications Sheet: PPD60PV, Shinyei Technology Co., Ltd."},{"key":"ref_20","first-page":"843","article-title":"Comparison of the Grimm 1.108 and 1.109 Portable Aerosol Spectrometer to the TSI 3321 Aerodynamic Particle Sizer for Dry Particles","volume":"50","author":"Peters","year":"2006","journal-title":"Ann. Occup. Hyg."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"188","DOI":"10.1111\/j.1600-0889.2007.00312.x","article-title":"Surface-Atmosphere Interactions Over Complex Urban Terrain in Helsinki, Finland","volume":"60","author":"Vesala","year":"2008","journal-title":"Tellus Ser. B Chem. Phys. Meteorol."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"7847","DOI":"10.5194\/acp-9-7847-2009","article-title":"Annual Particle Flux Observations Over a Heterogeneous Urban Area","volume":"9","author":"Rannik","year":"2009","journal-title":"Atmos. Chem. Phys."},{"key":"ref_23","first-page":"71","article-title":"Seasonal and Diurnal Changes in Inorganic Ions, Carbonaceous Matter and Mass in Ambient Aerosol Particles at an Urban, Background Area","volume":"19","author":"Timonen","year":"2014","journal-title":"Boreal Environ. Res."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"212","DOI":"10.1016\/j.atmosenv.2006.01.063","article-title":"Chemical Composition and Mass Closure of Particulate Matter at Six Urban Sites in Europe","volume":"40","author":"Hillamo","year":"2006","journal-title":"Atmos. Environ."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"2869","DOI":"10.5194\/acp-5-2869-2005","article-title":"Organic, Elemental and Inorganic Carbon in Particulate Matter of Six Urban Environments in Europe","volume":"5","author":"Frey","year":"2005","journal-title":"Atmos. Chem. Phys."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"119","DOI":"10.1016\/j.scitotenv.2005.01.024","article-title":"Chemical Composition, Mass Size Distribution and Source Analysis of Long-Range Transported Wildfire Smokes in Helsinki","volume":"350","author":"Saarikoski","year":"2005","journal-title":"Sci. Total Environ."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"2299","DOI":"10.5194\/acp-5-2299-2005","article-title":"Characterization of Aerosol Particle Episodes in Finland Caused by Wildfires in Eastern Europe","volume":"5","author":"Niemi","year":"2005","journal-title":"Atmos. Chem. Phys."},{"key":"ref_28","first-page":"47","article-title":"Statistical Model for Assessing the Portion of Fine Particulate Matter Transported Regionally and Long Range to Urban Air","volume":"30","author":"Karppinen","year":"2004","journal-title":"Scand. J. Work Environ. Health"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"3577","DOI":"10.1016\/j.atmosenv.2006.12.053","article-title":"Chemical Composition of Aerosols during a Major Biomass Burning Episode Over Northern Europe in Spring 2006: Experimental and Modelling Assessments","volume":"41","author":"Saarikoski","year":"2007","journal-title":"Atmos. Environ."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"5635","DOI":"10.5194\/acp-8-5635-2008","article-title":"Size Distributions, Sources and Source Areas of Water-Soluble Organic Carbon in Urban Background Air","volume":"8","author":"Timonen","year":"2008","journal-title":"Atmos. Chem. Phys."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"2253","DOI":"10.1007\/s00216-010-4151-4","article-title":"High-Performance Anion-Exchange Chromatography-Mass Spectrometry Method for Determination of Levoglucosan, Mannosan, and Galactosan in Atmospheric Fine Particulate Matter","volume":"398","author":"Saarnio","year":"2010","journal-title":"Anal. Bioanal. Chem."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"6281","DOI":"10.5194\/acp-8-6281-2008","article-title":"Sources of Organic Carbon in Fine Particulate Matter in Northern European Urban Air","volume":"8","author":"Saarikoski","year":"2008","journal-title":"Atmos. Chem. Phys."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"229","DOI":"10.1016\/0004-6981(76)90095-0","article-title":"Particle Bounce Errors in Cascade Impactors","volume":"10","author":"Dzubay","year":"1976","journal-title":"Atmos. Environ."},{"key":"ref_34","unstructured":"Pirinen, P., Simola, H., Aalto, J., Kaukoranta, J., Karlsson, P., and Ruuhela, R. (2012). Tilastoja Suomen Ilmastosta 1981\u20132010, Finnish Meteorological Institute."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/17\/12\/2915\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T18:54:04Z","timestamp":1760208844000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/17\/12\/2915"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017,12,15]]},"references-count":34,"journal-issue":{"issue":"12","published-online":{"date-parts":[[2017,12]]}},"alternative-id":["s17122915"],"URL":"https:\/\/doi.org\/10.3390\/s17122915","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2017,12,15]]}}}