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Correia, C., Martins, V., Matroca, B., Santana, P., Mariano, P., Almeida, A....Almeida, S.M. (2023). A low-cost sensor system installed in buses to monitor air quality in cities. International Journal of Environmental Research and Public Health. 20 (5)

C. Correia et al.,  "A low-cost sensor system installed in buses to monitor air quality in cities", in Int. Journal of Environmental Research and Public Health, vol. 20, no. 5, 2023

@article{correia2023_1732197857305,
	author = "Correia, C. and Martins, V. and Matroca, B. and Santana, P. and Mariano, P. and Almeida, A. and Almeida, S.M.",
	title = "A low-cost sensor system installed in buses to monitor air quality in cities",
	journal = "International Journal of Environmental Research and Public Health",
	year = "2023",
	volume = "20",
	number = "5",
	doi = "10.3390/ijerph20054073",
	url = "https://www.mdpi.com/1660-4601/20/5/4073"
}

TY  - JOUR
TI  - A low-cost sensor system installed in buses to monitor air quality in cities
T2  - International Journal of Environmental Research and Public Health
VL  - 20
IS  - 5
AU  - Correia, C.
AU  - Martins, V.
AU  - Matroca, B.
AU  - Santana, P.
AU  - Mariano, P.
AU  - Almeida, A.
AU  - Almeida, S.M.
PY  - 2023
SN  - 1660-4601
DO  - 10.3390/ijerph20054073
UR  - https://www.mdpi.com/1660-4601/20/5/4073
AB  - Air pollution is an important source of morbidity and mortality. It is essential to understand to what levels of air pollution citizens are exposed, especially in urban areas. Low-cost sensors are an easy-to-use option to obtain real-time air quality (AQ) data, provided that they go through specific quality control procedures. This paper evaluates the reliability of the ExpoLIS system. This system is composed of sensor nodes installed in buses, and a Health Optimal Routing Service App to inform the commuters about their exposure, dose, and the transport’s emissions. A sensor node, including a particulate matter (PM) sensor (Alphasense OPC-N3), was evaluated in laboratory conditions and at an AQ monitoring station. In laboratory conditions (approximately constant temperature and humidity conditions), the PM sensor obtained excellent correlations (R2≈1) against the reference equipment. At the monitoring station, the OPC-N3 showed considerable data dispersion. After several corrections based on the k-Köhler theory and Multiple Regression Analysis, the deviation was reduced and the correlation with the reference improved. Finally, the ExpoLIS system was installed, leading to the production of AQ maps with high spatial and temporal resolution, and to the demonstration of the Health Optimal Routing Service App as a valuable tool.
ER  -