Study on Interference Factors of Light Scattering PM2.5 Dust Test Instrument

Abstract

Abstract Light scattering PM2.5 dust test instrument is widely used, but it is susceptible to many kinds of interference, and will produce large deviation in some industrial sites. The influence of particle size, relative humidity and other parameters on the measurement results of light scattering dust meter is studied and corrected. The experimental results show that the relative error of detecting single particle size dust is smaller than that of detecting multi-particle size dust. Relative humidity has no effect on non-hygroscopic dust detection, but has obvious influence on hygroscopic dust detection, and the relative error after correction is significantly reduced.