Electric Hygro-Permeameter

Abstract

An electric hygro-permeameter is effectively applicable to measure the permeability of moisture of various kinds of materials in sheet form.
As the anti-moisture properties are very important for packing materials the electric hygro-permeameter given in this article was applied to measure the moisture permeability of these materials. This measuring method makes it possible to observe moisture penetration moment by moment and to judge the degree of moisture permeability of a sample material within only one hour, the time equivalent to one seventieth of that required in ordinary weighing method.