Prolific Air Permeability Tester - Vacuum System With Rotameter Measurement | Adjustable Test Area, Precision Airflow Measurement, Durable Rubber Gaskets

Air permeability is the property of a fabric to allow passage of air through it under the effect of a difference in pressure across its two faces. It is defined as the volume of air passing through a defined area under a specified pressure difference over a known period of time. It is a very important property for fabrics which are used under conditions where it is necessary to know precisely the amount of air passing through it.

The PROLIFIC Air Permeability Tester for textiles consists of an arrangement to hold the test specimen between two flat faces so as to expose a known area to the flow of air through it, a vacuum system to draw air through the exposed area of the test specimen, arrangement to measure the volume of air flowing through the test specimen, and arrangement to measure the pressure drop between the two faces of the test specimen as a result of flow of air.

The test specimen is held between two annular ring shaped grips. The grips are lined with rubber gaskets to reduce flow of air through the edges. The two grips can be brought in contact with each other with the help of a hand operated screw arrangement. The test area can be altered by placing adapter discs of different openings in the grips.

The vacuum needed to draw air through the exposed area of the test specimen is created with the help of a vacuum pump supplied with the equipment. The volume of air passing through the test area is measured with the help of a set of rotameters.