10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
Abstract View
An Electric Impaction Sensor for Detecting PM2.5
CHEN TZU-MING, Hsu Jung-Nan, Fan-Lun Chen, Shuenn-Chin Chang, Industrial Technology Research Institute
Abstract Number: 599 Working Group: Low-Cost and Portable Sensors
Abstract This paper presents a novel PM2.5 detection method. The aerosol sensor, including PM2.5 separating, particle charging, ion trap and measurement sections was assembled in a cylinder. When charged particles impact the grounded metal electrode, the electrode will deliver electrical current to the measurement system. The electrical current intensity represents the concentration of particles in the sample. For finding the relationship between the particle mass concentration and the current signal, the correlation between the magnitude of the signal and the particle mass concentration was experimentally investigated where an optical device (DUSTTRAK DRX model 8533, TSI) was employed as a reference of particle mass concentration. The results show that the intensity of the measured current is linearly proportional to the particle mass concentration. The square of correlation coefficient (R2) is 0.898. The average relative errors of the measured aerosol mass concentration are 10% to 31%.