摘要：以粒子计数器为测试手段的粒径效率测试法是目前过滤器测试的主要方法。通过对粒子计数器测试原理和误差的分析 ,指出了粒子计数器使用中应注意的一些问题。

关键词：过滤器;粒子计数器;粒径效率;

Abstract：The importance of expressing the pore structure，the developing course of porositytester and the difference of our country with other developed nations on the measurement technology of pores are expounded．The two main methodes on the determining porosity is discussed．T he idea on the devlopment of measurement technology of pore structure in our country is advanced． 

Key words：particle material；pore structure；porosity；measure men