Traceable PM2.5 and PM10 Calibration of Low-Cost Sensors with Ambient-like Aerosols Generated in the Laboratory

Applied Sciences

卷:11

Konstantina Vasilatou¹  Kevin Auderset¹  Georgi Tancev¹  Stefan Horender¹ 

[1] Laboratory for Particles and Aerosols, Federal Institute of Metrology METAS, 3003 Bern-Wabern, Switzerland;

关键词: air quality monitoring;    calibration;    low-cost;    optical sensor;    particulate matter (PM);    ambient-like aerosols;   

DOI  :  10.3390/app11199014

来源: DOAJ

【 摘 要 】

This work builds upon previous efforts at calibrating PM (particulate matter) monitors with ambient-like aerosols produced in the laboratory under well-controlled environmental conditions at the facility known as PALMA (Production of Ambient-like Model Aerosols). In this study, the sampling system of PALMA was equipped with commercial PM_2.5 and PM₁₀ impactors, designed according to the EN 12341:2014 standard, to select different aerosol size fractions for reference gravimetric measurements. Moreover, a metallic frame was mounted around the PM impactor to accommodate up to eight low-cost PM sensors. This sampling unit was placed at the bottom of the 2-meter-long aerosol homogenizer, right above the filter holder for the reference gravimetric measurements. As proof of principle, we used the upgraded PALMA facility to calibrate the new AirVisual Outdoor (IQAir, Goldach, Switzerland) and the SDS011 (InovaFitness, Jinan, China) low-cost PM sensors in a traceable manner against the reference gravimetric method according to the EN 12341 standard. This is the first time that PM_2.5 and PM₁₀ calibrations of low-cost sensors have been successfully carried out with complex ambient-like aerosols consisting of soot, inorganic species, secondary organic matter, and dust particles under controlled temperature and relative humidity.

【 授权许可】

Unknown