The Digital Air Permeability Tester M021A accurately and swiftly determines the resistance of fabrics (woven, knitted and non woven textile materials ) to the passage of air (air flow) under constant pre-set air pressure while firmly clamped in the test rig of selected test head/area. A 20 sq.cm test head is included with the instument.5 sq.cm test area, 20 sq.cm test area, 25 sq.cm test area, 38 sq.cm test area, 50 sq.cm test area. 100sq.cm test area.
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