颗粒密度和大小综合测定仪(EPCS)是根据激光衍射原理测定粉体物料的粒度分布。利用环形探测器测定由于衍射而在颗粒表面散射的光线。所产生的衍射图形与颗粒大小和形状有关。所获得的信号可以转变为粒度分布。多元环形探测器由32个环组成,在规格和准确度方面相当于现代化的实验 The particle density and size analyzer (EPCS) is based on the principle of laser diffraction particle size distribution of the powder material. A circular detector is used to measure the light scattered on the particle surface due to diffraction. The resulting diffraction pattern is related to particle size and shape. The signal obtained can be converted to a particle size distribution. Multivariate ring probe consists of 32 rings, the size and accuracy of the equivalent of modern experiments