An, Young Jun Moon, Byunghyuck Kim, Yong Soo Jeong, Yeongkon Lee, Seung-Bok Byun, Young Tae Jhon, Young Min 2024-01-12T03:32:57Z 2024-01-12T03:32:57Z 2022-04-27 2021-12 2288-9167 https://pubs.kist.re.kr/handle/201004/76815 The purpose of this study is to analyze the effect of temperature and humidity on the measured Particulate Matter (PM) concentrations recorded by PMS5003T, a low-cost light scattering type measuring tool. A regression analysis was performed on the ratio of PM concentrations measured by the light scattering method and the beta-ray absorption method according to temperature and humidity in an outdoor environment. As the temperature decreased, the PM concentration ratio increased, and this tendency intensified below 0o C. As the humidity increased, the PM concentration ratio increased, but the effect was less than the temperature effect. The coefficients of determination for temperature and humidity were R2 = 0.325 and 0.003, respectively, and the effects of temperature and humidity on the measured values w ere formulated and compensated for. As a result of the compensation, R2 , relative precision, accuracy and RMSE improved from 0.927 to 0.958, from 91.183% to 96.651%, from 31.383% to 74.058%, and from 13.517 μg/m³ to 6.690 μg/m³, respectively. Finally, results from this study indicate that the reliability of the low-cost light scattering type PM sensor can be improved by applying the temperature and humidity compensation method. Korean 한국냄새환경학회 저가형 광산란식 미세먼지 간이측정기로 측정한 겨울철 실외 미세먼지 농도에 대한 온습도의 영향 분석 Analysis of effects of temperature and humidity on PM concentrations measured with a low-cost light scattering type PM sensor in winter Article 10.15250/joie.2021.20.4.296 2 실내환경 및 냄새 학회지, v.20, no.4, pp.296 - 303 실내환경 및 냄새 학회지 20 4 296 303 N kci ART002799419 Light scattering type PM sensor PM monitoring Temperature and humidity Compensation