Development of Low-Cost Air Quality Stations for Next Generation Monitoring Networks: Calibration and Validation of PM2.5 and PM10 Sensors

Sensors
Alice CavaliereAlessandro Zaldei

Abstract

A low-cost air quality station has been developed for real-time monitoring of main atmospheric pollutants. Sensors for CO, CO₂, NO₂, O₃, VOC, PM2.5 and PM10 were integrated on an Arduino Shield compatible board. As concerns PM2.5 and PM10 sensors, the station underwent a laboratory calibration and later a field validation. Laboratory calibration has been carried out at the headquarters of CNR-IBIMET in Florence (Italy) against a TSI DustTrak reference instrument. A MATLAB procedure, implementing advanced mathematical techniques to detect possible complex non-linear relationships between sensor signals and reference data, has been developed and implemented to accomplish the laboratory calibration. Field validation has been performed across a full "heating season" (1 November 2016 to 15 April 2017) by co-locating the station at a road site in Florence where an official fixed air quality station was in operation. Both calibration and validation processes returned fine scores, in most cases better than those achieved for similar systems in the literature. During field validation, in particular, for PM2.5 and PM10 mean biases of 0.036 and 0.598 µg/m³, RMSE of 4.056 and 6.084 µg/m³, and R² of 0.909 and 0.957 were achieved, respective...Continue Reading

References

Jan 24, 2009·The New England Journal of Medicine·C Arden PopeDouglas W Dockery
Aug 29, 2013·Environmental Science & Technology·Emily G SnyderPeter W Preuss
Dec 9, 2014·Environment International·Prashant KumarRex Britter
May 20, 2016·Sensors·Alejandro VelascoMaurizio Rebaudengo
Mar 2, 2018·Sensors·Julien J CaubelThomas W Kirchstetter

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Citations

Mar 12, 2019·Environmental Science. Processes & Impacts·Thor-Bjørn Ottosen, Prashant Kumar
Feb 20, 2020·Sensors·Ihsane GryechAbdellatif Kobbane
Jan 10, 2020·Environmental Monitoring and Assessment·Àlex BosoÁlvaro Hofflinger
Feb 11, 2020·Environmental Monitoring and Assessment·Matías TaglePedro Oyola
Sep 6, 2020·Sensors·Wilmar Hernandez, Alfredo Mendez
Jan 8, 2020·ACS Applied Materials & Interfaces·Miguel A AndrésIgnacio Gascón
Sep 2, 2021·Annual Review of Biomedical Data Science·Xinyue ZhangMichael P Snyder

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Methods Mentioned

BETA
light-scattering

Software Mentioned

Google mashup
AIRQino
FAC2
MATLAB
DustTrak
ARPAT

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