The Paper air permeability tester is used to measure air permeability in terms of time and unit pressure differential under specific conditions. It calculates the mean airflow through the sheets per unit area.It incorporates the conventional "Paper porosity method," which is used to measure the permeability of paper.Measuring range 0 to 1000 ml/min;Test area-10 ± 0.02 cm2; Area differential pressure-1 ± 0.01 kPa; Inner diameter of grip rin-35.68 ± 0.05 mm;Dimension 410×300×1160 mm;Weight-About 15kg; for more visit labtron.us