Fibretec's permeability tester is accurate on a large range of permeabilities. It is widely used for testing paper, paper machine forming fabrics, press felts & dryer fabrics and filter papers. The accuracy of tester is based on the large flow of outlet area (10cm2) of the measuring head. The orifice disc with 6 different hole diameters gives a wide range of permeability from 150 - 16000 m3/hm2. The display of the input pressure and pressure difference is displayed on Digital Pressure Gauge with imported pressure transmitter. Variable fan speed adjustor.