The N600P Air Permeability Tester is designed to measure the air permeability of paper and cardboard using three established methods: Gurley, Schopper-Riegler, and Bendtsen.
This versatile instrument ensures accurate and reliable results for a variety of materials and applications.
Operating Principle:
Gurley Method: Measures the time taken for 100ml of gas to pass through the sample at a constant pressure difference of 1.23 kPa.
Schopper-Riegler Method: Determines the air flow rate through the sample by measuring the volume under a constant pressure difference of 1.00 kPa ± 0.01 kPa or 2.50 ± 0.01 kPa over a selected test duration.
Bendtsen Method: Records the air flow through the test surface at a constant pressure difference of 1.47 kPa after clamping for 5 seconds.
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