Particle and aerosol research (한국입자에어로졸학회지)

Korean Association for Particle and Aerosol Research (한국입자에어로졸학회)
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Laboratory/Field evaluation and calibration method of low-cost PM sensor for indoor PM2.5, PM10 measurement

실내 미세먼지 측정을 위한 저가형 PM 센서의 실험실/현장 평가 및 보정 방법

  • Doheon, Kim (Department of Mechanical Engineering, Yonsei University) ;
  • Dongmin, Shin (Department of Mechanical Engineering, Yonsei University) ;
  • Jungho, Hwang (Department of Mechanical Engineering, Yonsei University)
  • 김도헌 (연세대학교 기계공학부) ;
  • 신동민 (연세대학교 기계공학부) ;
  • 황정호 (연세대학교 기계공학부)
  • Received : 2022.08.29
  • Accepted : 2022.10.25
  • Published : 2022.12.31
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Abstract

Recently, low-cost particulate matter (PM) sensors have been widely used in monitoring mass concentration. Maintaining the accuracy of the sensors is important and requires rigorous performance evaluation and calibration. In this study, two commercial low-cost PM sensors(LCS), Plantower PMS3003 and Plantower PMS7003, were evaluated in the laboratory and field with a reference-grade PM monitor (GRIMM 11-D). Laboratory evaluation was conducted with single/mixed particles of PSL (Poly Styrene Latex) in an acrylic chamber at 20℃ and relative humidity of 20%. Field evaluation was conducted inside a building of Yonsei University (Shinchon) from February 12 to March 31, 2022. In both evaluations, LCS measured values became different from reference measured values when the relative humidity was high or the outdoor air PM10/PM2.5 ratio was high. Based on the field evaluation, the LCS measured values were corrected through four different regression analysis models. As a result, the multivariate polynomial regression analysis model showed highest matching with the reference PM monitor (PM2.5 >0.9, PM10 >0.85). In this model, the PM10/PM2.5 ratio and relative humidity were chosen as independent variables.

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Acknowledgement

본 연구는 산업통상자원부(MOTIE)와 한국에너지기술평가원(KETEP)의 지원을 받아 수행한 연구과제입니다. (No. 20181110200170)

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