Porous Materials Inc., Ithaca, N.Y., has developed a multi-chamber and multi-mode porometer for use
on such materials as nonwovens, cosmetics, filters, paper and ceramics.The porometer contains five
sample chambers. Four chambers are used for fast sample characterization. The fifth chamber is used
to perform more sophisticated tests.The instrument uses Windows-based software to measure the
pressures and the corresponding flow rates that determine the largest pore diameter, mean flow pore
diameter, pore size distribution, gas permeability and hydrohead of the sample.The porometer can
also measure liquid permeability.