PROBE PERMEAMETER

摘要

The present invention provides a probe permeameter (1) comprising a source of compressed gas (15, 20), a pressure regulator (2), at least one open coil of fine tubing (5) and at least one valve controlled coil of fine tubing (6, 7, 8) disposed in series, pressure indicating means (3A, 4A) respectively upstream and downstream of said coils, and a gas nozzle (19) operatively associated with a sealing annulus (21), whereby with the nozzle urged into contact with a test specimen, gas is delivered at laminar flow and wherein the pressure indicating means indicates the differential pressure generated in the specimen and hence the permeability thereof. The permeameter is adopted for use with a manually pressurisable gas source (15) which allows the device to be readily transported.