Applicability of compact and useful PM2.5 instrument with gas sensors in Japan and Thailand
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Issued Date
2025-08-01
Resource Type
eISSN
25901621
Scopus ID
2-s2.0-105011686117
Journal Title
Atmospheric Environment X
Volume
27
Rights Holder(s)
SCOPUS
Bibliographic Citation
Atmospheric Environment X Vol.27 (2025)
Suggested Citation
Aung H.K.Z.Z., Boontanon S.K., Li J., Sakamoto Y., Murano K., Boontanon N., Kajii Y. Applicability of compact and useful PM2.5 instrument with gas sensors in Japan and Thailand. Atmospheric Environment X Vol.27 (2025). doi:10.1016/j.aeaoa.2025.100350 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/111481
Title
Applicability of compact and useful PM2.5 instrument with gas sensors in Japan and Thailand
Corresponding Author(s)
Other Contributor(s)
Abstract
Sophisticated standard instruments are not always available for high-density multipoint air quality observations owing to their relatively high cost, large size, and high-power consumption. Low-cost sensors may be used as supportive or potential solutions for atmospheric observations. This study aimed to evaluate applicability of the compact and useful PM<inf>2.5</inf> instrument with gas sensors (CUPI-G), which can measure real-time temperature, humidity, particulate matter (PM<inf>2.5</inf>), carbon monoxide (CO), nitric oxide (NO), nitrogen dioxide (NO<inf>2</inf>), and oxidant, O<inf>x</inf> (O<inf>3</inf>+NO<inf>2</inf>), and to observe the respective air pollution patterns in the suburban areas of developed and developing countries, selected as Japan and Thailand, respectively. The CUPI-G was validated with collocated standard instruments at both sites using a mathematical correction method to improve reproducibility before observation. Air quality observations were conducted for two weeks respectively from June 1<sup>st</sup> to June 14<sup>th</sup>, 2022, in Kyoto City, Japan and from October 28<sup>th</sup> to November 12<sup>th</sup>, 2022, in Nong Khaem District, Bangkok Province, Thailand, using CUPI-G. In Japan, applicability of the CUPI-G revealed different correlations, r = −0.30 to 0.89 with data from the nearest air monitoring station. In Thailand, it achieved strong correlations, r = 0.71 to 0.82 with the results of the nearest station. This study revealed the applicability performance, aiding future deployment of the CUPI-G and corresponding air pollution characteristics at observatories. Our results suggest a better performance of CUPI-G at polluted sites and recommend its use in developing countries having less-developed sites with lack of routine measurement equipment.