Applicability of compact and useful PM2.5 instrument with gas sensors in Japan and Thailand
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 aim...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-08-01
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| Series: | Atmospheric Environment: X |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590162125000401 |
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| Summary: | 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 PM2.5 instrument with gas sensors (CUPI-G), which can measure real-time temperature, humidity, particulate matter (PM2.5), carbon monoxide (CO), nitric oxide (NO), nitrogen dioxide (NO2), and oxidant, Ox (O3+NO2), 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 1st to June 14th, 2022, in Kyoto City, Japan and from October 28th to November 12th, 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. |
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| ISSN: | 2590-1621 |