Labmate Paper Air Permeability Tester uses advanced technology to measure air permeability from 0-2500 ml/min with a 0.05-6 Kpa pressure range. It's measuring area is 6.42 cm², 10 cm² (selectable). Equipped with microcomputer control, LCD screen, and micro-printer, it delivers quick, precise results for materials like paper, mica tape, and more.