Extensive evaluation and classification of low-cost dust sensors in laboratory using a newly developed test method |
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Authors: | Kang-Ho Ahn Handol Lee Hae Dong Lee Sang Chul Kim |
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Affiliation: | 1. Department of Mechanical Engineering, Hanyang University, ERICA, Ansan, Korea;2. Korea Conformity Laboratories, Geumcheon-Gu, Seoul, Korea |
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Abstract: | An extensive evaluation of low-cost dust sensors was performed using an exponentially decaying particle concentration. A total of 264 sensors including 27 sensors with light-emitting diodes (LEDs) and 237 sensors with laser lighting sources were tested. Those tested sensors were classified into 4 groups based on the deviation from the reference data obtained by a reference instrument. The response linearities of all the tested samples for PM1, PM2.5, and PM10 were in excellent agreement with the reference instrument, except a few samples. For the measurements of PM1 and PM2.5, the lighting source, that is, LED or laser, did not show any significant difference in overall sensor performance. However, LED-based sensors did not perform well for PM10 measurements. The 32, 24, and 16% of all the tested sensors for PM1, PM2.5, and PM10 measurement, respectively, are in the category of Class 1 (reference instrument reading ± 20%) requirement. The performance of the low-cost dust sensors for PM10 measurement was relatively less satisfactory. |
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Keywords: | embedded type sensor exponentially decaying particle concentration lighting source low-cost dust sensor module type sensor standalone type sensor |
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