Ambient Air Quality Measurement with Low-Cost Optical and Electrochemical Sensors: An Evaluation of Continuous Year-Long Operation

Sensor technology is attractive to the public due to its availability and ease of use. However, its usage raises numerous questions. The general trustworthiness of sensor data is widely discussed, especially with regard to accuracy, precision, and long-term signal stability. The VSB-Technical Univer...

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Autores principales:	Jiří Bílek, Ondřej Bílek, Petr Maršolek, Pavel Buček
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	sensor electrochemical sensors air quality PM10 particulate matter inhalable particles air pollution Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/560ff49505e44c7b90b56f69df31e0b5
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spelling	oai:doaj.org-article:560ff49505e44c7b90b56f69df31e0b52021-11-25T17:31:00ZAmbient Air Quality Measurement with Low-Cost Optical and Electrochemical Sensors: An Evaluation of Continuous Year-Long Operation10.3390/environments81101142076-3298https://doaj.org/article/560ff49505e44c7b90b56f69df31e0b52021-10-01T00:00:00Zhttps://www.mdpi.com/2076-3298/8/11/114https://doaj.org/toc/2076-3298Sensor technology is attractive to the public due to its availability and ease of use. However, its usage raises numerous questions. The general trustworthiness of sensor data is widely discussed, especially with regard to accuracy, precision, and long-term signal stability. The VSB-Technical University of Ostrava has operated an air quality sensor network for more than two years, and its large sets of valid results can help in understanding the limitations of sensory measurement. Monitoring is focused on the concentrations of dust particles, NO<sub>2</sub>, and ozone to verify the impact of newly planted greenery on the reduction in air pollution. The sensor network currently covers an open field on the outskirts of Ostrava, between Liberty Ironworks and the nearby ISKO1650 monitoring station, where some of the worst air pollution levels in the Czech Republic are regularly measured. In the future, trees should be allowed to grow over the sensors, enabling assessment of the green barrier effect on air pollution. As expected, the service life of the sensors varies from 1 to 3 years; therefore, checks are necessary both prior to the measurement and regularly during operation, verifying output stability and overall performance. Results of the PMx sensory measurements correlated well with the reference method. Concentration values measured by NO<sub>2</sub> sensors correlated poorly with the reference method, although timeline plots of concentration changes were in accordance. We suggest that a comparison of timelines should be used for air quality evaluations, rather than particular values. The results showed that the sensor measurements are not yet suitable to replace the reference methods, and dense sensor networks proved useful and robust tools for indicative air quality measurements (AQM).Jiří BílekOndřej BílekPetr MaršolekPavel BučekMDPI AGarticlesensorelectrochemical sensorsair qualityPM10 particulate matterinhalable particlesair pollutionEnvironmental technology. Sanitary engineeringTD1-1066ENEnvironments, Vol 8, Iss 114, p 114 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	sensor electrochemical sensors air quality PM10 particulate matter inhalable particles air pollution Environmental technology. Sanitary engineering TD1-1066
spellingShingle	sensor electrochemical sensors air quality PM10 particulate matter inhalable particles air pollution Environmental technology. Sanitary engineering TD1-1066 Jiří Bílek Ondřej Bílek Petr Maršolek Pavel Buček Ambient Air Quality Measurement with Low-Cost Optical and Electrochemical Sensors: An Evaluation of Continuous Year-Long Operation
description	Sensor technology is attractive to the public due to its availability and ease of use. However, its usage raises numerous questions. The general trustworthiness of sensor data is widely discussed, especially with regard to accuracy, precision, and long-term signal stability. The VSB-Technical University of Ostrava has operated an air quality sensor network for more than two years, and its large sets of valid results can help in understanding the limitations of sensory measurement. Monitoring is focused on the concentrations of dust particles, NO<sub>2</sub>, and ozone to verify the impact of newly planted greenery on the reduction in air pollution. The sensor network currently covers an open field on the outskirts of Ostrava, between Liberty Ironworks and the nearby ISKO1650 monitoring station, where some of the worst air pollution levels in the Czech Republic are regularly measured. In the future, trees should be allowed to grow over the sensors, enabling assessment of the green barrier effect on air pollution. As expected, the service life of the sensors varies from 1 to 3 years; therefore, checks are necessary both prior to the measurement and regularly during operation, verifying output stability and overall performance. Results of the PMx sensory measurements correlated well with the reference method. Concentration values measured by NO<sub>2</sub> sensors correlated poorly with the reference method, although timeline plots of concentration changes were in accordance. We suggest that a comparison of timelines should be used for air quality evaluations, rather than particular values. The results showed that the sensor measurements are not yet suitable to replace the reference methods, and dense sensor networks proved useful and robust tools for indicative air quality measurements (AQM).
format	article
author	Jiří Bílek Ondřej Bílek Petr Maršolek Pavel Buček
author_facet	Jiří Bílek Ondřej Bílek Petr Maršolek Pavel Buček
author_sort	Jiří Bílek
title	Ambient Air Quality Measurement with Low-Cost Optical and Electrochemical Sensors: An Evaluation of Continuous Year-Long Operation
title_short	Ambient Air Quality Measurement with Low-Cost Optical and Electrochemical Sensors: An Evaluation of Continuous Year-Long Operation
title_full	Ambient Air Quality Measurement with Low-Cost Optical and Electrochemical Sensors: An Evaluation of Continuous Year-Long Operation
title_fullStr	Ambient Air Quality Measurement with Low-Cost Optical and Electrochemical Sensors: An Evaluation of Continuous Year-Long Operation
title_full_unstemmed	Ambient Air Quality Measurement with Low-Cost Optical and Electrochemical Sensors: An Evaluation of Continuous Year-Long Operation
title_sort	ambient air quality measurement with low-cost optical and electrochemical sensors: an evaluation of continuous year-long operation
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/560ff49505e44c7b90b56f69df31e0b5
work_keys_str_mv	AT jiribilek ambientairqualitymeasurementwithlowcostopticalandelectrochemicalsensorsanevaluationofcontinuousyearlongoperation AT ondrejbilek ambientairqualitymeasurementwithlowcostopticalandelectrochemicalsensorsanevaluationofcontinuousyearlongoperation AT petrmarsolek ambientairqualitymeasurementwithlowcostopticalandelectrochemicalsensorsanevaluationofcontinuousyearlongoperation AT pavelbucek ambientairqualitymeasurementwithlowcostopticalandelectrochemicalsensorsanevaluationofcontinuousyearlongoperation
_version_	1718412223126175744

Ambient Air Quality Measurement with Low-Cost Optical and Electrochemical Sensors: An Evaluation of Continuous Year-Long Operation

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