System for controlled humidity tests

Measuring and testing – With fluid pressure – Porosity or permeability

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G01N 1508, G01M 300

Patent

active

048523895

ABSTRACT:
A system for controlled humidity tests wherein gas transmission through a barrier may be measured, including apparatus for controllably mixing a dry gas and wet gas, for conveying the mixed gas to a test chamber or chambers for measurement of relative humidity and gas transition through a barrier, including gas transmission conduits having a pressure drop of less than 1 percent of ambient pressure, and including conduit temperature controls to maintain a controlled first temperature in the test chamber or chambers, and controlled higher temperatures in all other gas conduits.

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patent: 4656865 (1987-04-01), Callan
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