A permeameter provides normal and lateral permeability measurements on porous materials. The permeability measurements can be made on compressed or uncompressed samples and can be made at room temperature or at elevated temperatures. A wide variety of fluids, gas or liquid, can be used as the penetrating...http://www.google.fr/patents/US6655192?utm_source=gb-gplus-shareBrevet US6655192 - Permeameter-porosimeter
