Porolus 1000 is a capillary flow porometer, based on the displacement of a wetting liquid inside a porous network by means of an inert gas flow. It is used for the rapid measurement of through-pores in materials such as porous membrane, filters, paper, plastics, thin film and many other applications. It can be operated at high pressure to determine the bubble point, average pore size (mean flow pore diameter) and distribution from 500 micron to 18 nm with low surface tension wetting liquid (POREFIL). It also allows to measure gas permeability of membranes.