Air-operated permeameter 0.28 - 244 cc/cm2 s | 415

In this textile air permeability measurement device of Frazils system, the test specimen is mounted at the sample stand. The pump is so adjusted that the inclined type air pressure gauge may show the pressure of 1.27 cm at the water column by use of the resistor for pressure adjustment use. From the scale indication observed then of the vertical type air pressure gauge and the kind of used orifice, the air amount (mt/cm2/sec.), which passes the test specimen, is obtanied.