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A permeameter is a device used to measure the rate at which water or water vapor can flow through a porous membrane such as a filter. They are able to carry out such measurements at a range of humidities, temperatures and pressures to simulate various operating conditions.
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These asphalt permeameters are compact, self-contained, easy-to-use units, which can be used in the lab or in the field.
Hydraulic conductivity and soil sorptivity are quickly calculated from water flow rates measured from two constant head levels using the HM-127 Permeameter.
The PMI Water Vapor Transmission Analyzer is capable of measuring water vapor transmission through porous media such as textiles, leathers, man-made materials, membranes, nonwovens, and fabrics used in numerous high tech components and consumer products manufactured by a variety of industries. The instrument has the unique ability to measure vapor transmission rate over a wide range of humidity, gradients of humidity, temperature and pressure encountered in application environments.
NER's TinyPerm II is a portable hand-held air permeameter used for measurement of rock matrix permeability or effective fracture apertures on outcrops and at the core scale.
Permeation tubes are used for producing gas mixtures with exactly controlled composition. In principle, they are closed containers whose walls allow the substance in the container to permeate through with a temperature-dependent permeability rate.
Laboratory equipment of analytical degree, used to measure the gas permeability from cylindrical rock samples, its measurement principle is Darcy’s Law for linear flow in compressible fluids.