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Hight Pressure Densometers
High Pressure Densometers are the accepted standard for measuring the porosity, air-permeability or air-resistance of materials having low permeability. Typical materials include coated papers, plastics and membranes.
The densometer test measures the time required for a specific volume of air (2.5cc to 30cc), at a constant pressure of 12.2 inches W.C., to flow through a standard area of the material being tested.
– The high pressure densometers operate similarly to the Standard Pressure Densometers but are as great as twenty-five times faster. The increased speed is due to higher air pressure (12.20 inches H2O) and air volumes are much smaller (2.5cc to 30 cc).
TAPPI T-536-88
ASTM D-726-58, Method B.
4150N
– The high pressure densometers operate similarly to the Standard Pressure Densometers but are as great as twenty-five times faster. The increased speed is due to higher air pressure (12.20 inches H2O) and air volumes are much smaller (2.5cc to 30 cc).
TAPPI T-536-88
ASTM D-726-58, Method B.
4150N
