10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
Abstract View
The Performance Evaluation System of Low-Cost Air Quality Sensors in Taiwan
Yen-Ting Li, CHIA-WEI CHANG, Yi-Cyun Yang, Jiunn-Haur Shaw, Yeuh-Bin Wang, Industrial Technology Research Institute
Abstract Number: 1061 Working Group: Low-Cost and Portable Sensors
Abstract With the tremendous advantage and wide application of low-cost PM2.5 sensors in the Internet of Things (IoT) network, many citizens in Taiwan had installed personal PM2.5 sensors and shared their monitoring data to the public. However, the data quality of commercially available low-cost sensors is varied, and the misuse of data might arise unnecessary worries. To systematically evaluate the performance of low-cost PM2.5 sensors, Taiwan EPA (Environmental Protection Administration) works with ITRI (Industrial Technology Research Institute) on the building of the corresponding evaluation platform. The platform includes two testing environments, one under the real outdoor environment (field test), and the other under the well-controlled environment (lab test). Data from PM2.5 sensors are compared with USEPA FEM (Federal Equivalent Method) instruments installed in the platform, and parameters including intra-model variability, data recovery, accuracy（bias error）, and linear correlation coefficient (R2) of PM2.5 sensors could be investigated by the field test station. Additional parameters such as precision, interferents, detection limit, and drift could be investigated by the lab test station. The lab test station also covers the evaluation of sensors performances under extreme environments (temperature, humidity, PM2.5 concentration). We state in detail in this report the hardware design and testing protocol of the platform, and testing results of some PM2.5 sensors. We anticipate this platform could help the control of data quality of PM2.5 sensors and thus improve the air quality monitoring in Taiwan.