Porous Materials, Inc > Products > Permeability Testing Products

Permeability Testing Products

Permeability is a measure of the ability of a material to transmit fluids; the rate of flow of a liquid or gas through a porous material.

Capillary Flow Porometer  |  Liquid Permeameter  |  Gas Permeameter  |  Diffusion Permeameter
Vapor Permeameter  |  Microflow Porometer  |  Compression Porometer  |  Complete Filter Cartridge Analyzer
Liquid Extrusion Porosimeter  |  Water Vapor Transmission Analyzer

Capillary Flow Porometer

Capillary Flow Porometer

Available Tests:
  • Bubble Point (largest pore)
  • Mean Pore Size
  • Pore Size Distribution
  • Integrity
  • Gas, Liquid, Gurley, and Frazier permeability
  • Hydro-Head test
  • External Surface Area
Operating Conditions:
  • Compression/Cyclic Compression
  • Tension
  • Elevated Temperature
  • Test gas - Air or Noncorrosive gas
  • Test liquid - A variety of chemicals usable
Features:
  • Nondestructive
  • Automated Control
  • No toxic material or subzero temperature used
  • Minimal effect on pore structure due to the use of low pressures

PMI's Capillary Flow Porometer is versatile - it allows the user to test samples under compression, tension, elevated temperature, or an appropriate chemical environment, thereby simulating operating conditions. Industries worldwide, ranging from the filtration to nonwovens to battery industries, utilize the PMI Capillary Flow Porometer for R&D and quality control. Samples tested include filter media, membranes, paper, and battery separators.

This instrument can also be customized for different testing options listed below:

Advanced Capillary Flow Porometer, Microflow Porometer, In-Plane Porometer, Clamp-On Porometer, and Quality Control Porometer.
Advanced Capillary Flow Porometers yield very objective, accurate and reproducible results, considerably reduce test duration, and require minimal operator involvement. Advanced Porometers are fully automated, and they are designed for linear turbulance-free test gas flow. The pressure is measured close to the sample and therefore the correction term in the differential pressure management is minimized. Required amount of pressure is uniformly applied on the o-ring seals on the sample and the need for hand tightening the cap on the sample chamber to apply pressure on the o-rings is eliminated. Automatic addition of wetting liquid reduces test time appreciably. This sophisticated instrument has found applications in a wide variety of industries.
The PMI Microflow Porometer is a Capillary Flow Porometer but with the ability to measure permeability in nearly impermeable materials. This instrument is user-friendly and nondestructive. The Microflow Porometer is an asset to quality control and R&D environments. The PMI Microflow Porometer is typically used to characterize membranes with very low permeability (gas separation membranes). Packaging, rubber and specialty gas manufacturing companies will find this instrument beneficial.
The PMI In-Plane Porometer - a Capillary Flow Porometer - has a sample chamber that allows gas to displace liquid in pores to move radially from the center to the periphery of a sheet shaped sample. Suitable sample configurations give in-plane pore structures of multi-layered materials.
The PMI Clamp-On Porometer is a porometer with a sample chamber that permits the test material to be clamped between two test heads on any desired location. There is no need for a sample to be cut from the bulk material. The bulk material can slide through the test head. Many tests can be performed rapidly on many locations on the bulk material without damaging the bulk material in any way.
The PMI Quality Control Porometer is a Capillary Flow Porometer that has fixed test parameters so tests can be performed without worrying about appropriate test parameters. Operator involvement is minimal and the tests are rapid. The instrument is suitable for quality control applications.

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Liquid Permeameter

Liquid Permeameter

Available Tests:
  • Liquid Permeability
Operating Conditions:
  • Compression/Cyclic Compression
  • Tension
  • Elevated Temperature
  • Test liquid - A variety of chemicals usable
Features:
  • Nondestructive
  • Automated Control

The PMI Liquid Permeameter is used to perform fast and accurate permeability tests of liquid permeability. PMI's Liquid Permeameter is user-friendly, features non-destructive permeability testing, and accommodates a wide variety of samples. The Liquid Permeameter also allows permeability testing under ambient or elevated temperature to simulate actual operating conditions. Industries worldwide, ranging from the filtration to the nonwovens to the battery industry, utilize the PMI Liquid Permeameter for R&D and quality control.

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Gas Permeameter

Gas Permeameter

Available Tests:
  • Gas Permeability
Operating Conditions:
  • Compression/Cyclic Compression
  • Tension
  • Elevated Temperature
  • Test gas - Air or Noncorrosive gas
Features:
  • Nondestructive
  • Automated Control
  • Results reportable in many units

The PMI Gas Permeameter provides fast and accurate measurement of gas permeability of solid/hollow cylindrical and sheet samples. Featuring nondestructive testing and fast results, PMI's Gas Permeameter is perfect for both R&D and quality control.

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Diffusion Permeameter

Diffusion Permeameter

Available Tests:
  • Diffusion Permeability
Operating Conditions:
  • Tension
  • Elevated Temperature
  • High pressures
  • Test gas - A variety of gases usable
Features:
  • Nondestructive Automated Control

The PMI Diffusion Permeameter provides fully automated analysis of diffusion and gas permeability. PMI's Diffusion Permeameter tests materials that typically have very low permeability and are therefore difficult to measure by conventional means. Industries worldwide, ranging from the filtration to the ceramic to the battery industry, utilize the PMI Diffusion Permeameter for R&D and quality control. Samples tested include membranes, filters, and battery electrodes.

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Vapor Permeameter

Vapor Permeameter

Available Tests:
  • Water Vapor Permeability
  • Gas Permeability
  • Diffusion Permeability
Operating Conditions:
  • Elevated Temperature
  • High pressures
  • Many vapors can be tested
Features:
  • Nondestructive
  • Automated Control

The principle of the vapor permeameter is the same as that of the diffusion permeameter except that instead of a gas, any noncorrosive vapor is used and the flow rate of the vapor is determined. Many applications of porous materials require very low vapor permeability through these materials. Such applications are found in many industries including biotech, healthcare, pharmaceutical, food, and packaging, environmental, power sources and chemical industries. Determination of the magnitudes of low flow rates of vapor through materials used in these applications is important for evaluation of the processes.

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Microflow Porometer

Microflow Porometer

Available Tests:
  • Mean Pore Size
  • Pore Size Distribution
  • Bubble Point (largest pore)
  • Integrity
  • Gas, Liquid, and Frazier permeability
  • Hydro-Head test
  • External Surface Area
Operating Conditions:
  • Compression/Cyclic Compression
  • Tension
  • Elevated Temperature
  • Test gas - Air or Noncorrosive gas
Features:
  • Very low permeability measurable
  • Nondestructive
  • Automated Control
  • No toxic substance used in tests

The PMI Microflow Porometer is a Capillary Flow Porometer but with the ability to measure permeability testing in nearly impermeable materials. This instrument is user-friendly and nondestructive. The Microflow Porometer is an asset to quality control and R&D environments. The PMI Microflow Porometer is typically used to characterize membranes with very low permeability (gas separation membranes). Packaging, rubber and specialty gas manufacturing companies will find this instrument beneficial.

This instrument can also be customized for different testing options listed below:

Capillary Porometer, In-Plane Porometer, Clamp-On Porometer, and Quality Control Porometer.

The PMI Capillary Porometer is versatile -- it allows the user to test samples under compression, tension, or elevated temperature, thereby simulating operating conditions. Industries worldwide, ranging from the filtration to nonwovens to battery industries, utilize the PMI Capillary Flow Porometer for R&D and quality control. Samples tested include filter media, membranes, paper, and battery separators.
The PMI In-Plane Porometer - a Capillary Flow Porometer - has a sample chamber that allows gas to displace liquid in pores to move radially from the center to the periphery of a sheet shaped sample. Suitable sample configurations give in-plane pore structures of multi-layered materials.
The PMI Clamp-On Porometer is a porometer with a sample chamber that permits the test material to be clamped between two test heads on any desired location. There is no need for a sample to be cut from the bulk material. The bulk material can slide through the test head. Many tests can be performed rapidly on many locations on the bulk material without damaging the bulk material in any way.
The PMI Quality Control Porometer is a Capillary Flow Porometer that has fixed test parameters so tests can be performed without worrying about appropriate test parameters. Operator involvement is minimal and the tests are rapid. The instrument is suitable for quality control applications.

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Compression Porometer

Compression Porometer

Available Tests:
  • Mean Pore Size
  • Pore Size Distribution
  • Bubble Point (largest pore)
  • Gas, Liquid, Gurley, and Frazier permeability
  • External Surface Area
Operating Conditions:
  • Compression/Cyclic Compression
  • Test gas - Air or Noncorrosive gas
Features:
  • Nondestructive
  • Automated Control

The Automated Compression Porometer is designed to characterize the pore structure of a material under compression. Industries world-wide, ranging from the filtration to the nonwovens and battery use, the PMI Compression Porometer for R&D and quality control. Samples often tested include filter media, membranes, paper and battery separators. The instrument permits tests to be carried out under simulated true service conditions.

This instrument can also be customized for different testing options listed here: Cyclic Compression Porometer.

The PMI Cyclic Compression Porometer applies cyclic stresses on a sample and measures the pore structure characteristics after a desired number of cycles. The stress cycle and porosity testing are continued. Many products like filtration media, battery and fuel cell components and felts used for dewatering paper are subjected to cyclic stresses. Such products need to be characterized under appropriate compressive stress cycles. The PMI Cyclic Compression Porometer tests samples under simulated true service conditions and measures the largest pore diameter, mean flow pore diameter, and pore size distribution. These data represent realistic characteristics of pore structure and porosity.

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Complete Filter Cartidge Analyzer

Complete Filter Cartridge Tester

Available Tests:
  • Mean Pore Size
  • Pore Size Distribution
  • Bubble Point (largest pore)
  • Integrity
  • Gas, Liquid, Gurley, and Frazier permeability
  • Hydro-Head test
Operating Conditions:
  • Elevated Temperature
Features:
  • Nondestructive
  • Automated Control
  • Adjusts cartridge of any size

The PMI Complete Filter Cartridge Tester provides fully automated through-pore analysis of entire filter cartridges of various geometries. PMI's Complete Filter Cartridge Tester is perfect for quality control and R&D environments. It is fast, accurate, and nondestructive. The Complete Filter Cartridge Tester has applications in any industry that utilizes filter cartridges. Specific examples include the automotive, filtration, nonwovens, and pharmaceutical industries.

This instrument can also be customized for different porosity testing options listed here: Filtration Media Analyzer.

The PMI Filtration Media Analyzer is designed to meet the needs of the filtration industry -- both in the R&D and quality control environments. The Filtration Media Analyzer characterizes a wide range of filter media, including microfiltration and ultrafiltration membranes.

Testing under compression, tension, and elevated temperature is also possible, thereby allowing the user to simulate actual operating conditions.

Also see our newest product, the Automated Filter Cartridge Tester.

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Liquid Extrusion Porosimeter

Liquid Extrusion Porosimeter

Available Tests:
  • Total Pore Volume
  • Mean Pore Size
  • Pore Size Distribution
  • Liquid Permeability
  • Porosimetry Surface Area
Operating Conditions:
  • Compression/Cyclic Compression
  • Tension
  • Elevated Temperature
  • Test gas - Air or Noncorrosive gas
  • Test liquid - A variety of chemicals usable
Features:
  • Nondestructive
  • Automated Control
  • No toxic substance used in tests

The Liquid Extrusion Porosimeter is employed for the characterization of porous materials used in many industries, such as biotech, pharmaceutical, filtration, food and environmental, without fear of harmful effects on employees or the environment from porosity testing.

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Water Vapor Transmission Analyzer

Water Vapor Transmission Analyzer

Available Tests:
Water Vapor Permeability due to:
  • Humidity Gradient
  • Pressure Gradient
  • Temperature Gradient
  • Combinations of these gradients
Operating Conditions:
  • Humidity from 5 - 95 %
  • Temperatures up to 95°C
  • Test gas - Nitrogen or any noncorrosive gas
  • Sample under desired stress
Features:
  • Nondestructive
  • Fully Automated
  • No toxic material used
  • Very little stress on sample

The PMI Water Vapor Transmission Analyzer is a highly versatile instrument capable of measuring water vapor transmission rate through a sample as a function of humidity, temperature, and pressure gradients. Two gas streams of known humidity are allowed to pass over the two sides of the sample. The humidity, temperatures, and pressures on the two sides are maintained at desired levels. The water vapor transfer rate is computed from measured temperature, pressure, humidity, and gas flow rates.

The wide variety of samples that can be tested in this instrument include textiles, nonwovens, household products, fuel cell products, and packaging materials.

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