Porous Materials, Inc > Products > Permeameters > Gas Permeation Analyzer
Gas Permeation Analyzer
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Description
The Gas Permeation Analyzer is used to determine the transport of various gases through sheet-like materials under a wide range of static and dynamic conditions, which in turn, can be used to simulate real-world applications. The instrument is equipped with a mass spectrometer in order to detect low transfer rates, which permits testing under small gradients of concentration, pressure, or temperature. This instrument is ideal for small and even delicate sheet-like materials such as fabrics, films, laminates, papers, plastics, and boards of thicknesses below 1.25 inches. The versatility and convenience of this instrument make it the optimal research tool for characterizing the dynamic properties of your material under both standard and non-standard conditions.
Principles of Operation
The basic principle is that when a gas stream containing a particular gas species flows below as well as above a sample at a steady rate, transport of that species through the sample can occur due to an imposed concentration, pressure, or temperature gradient. A mass spectrometer measures the concentration of the gas species at the inlet and outlet streams of the sample chamber. Using the measured concentration difference between the inlet and outlet, the mass transfer quantity can be calculated.
Jgas = Flux of Gas Species through the sample (scc/min * cm2)
Mi, Mo = Volumetric Flow Rate of Inlet & Outlet, respectfully (scc/min) on the low concentration side of the sample
A = Area (cm2)
Once the mass transfer quantity is computed, the Average Gas Concentration Difference can also be determined. This value represents the materials ability to maintain a difference in gas concentration from one side of the sample to the other under the specified flow conditions.
Typical Sample Chamber Layout
Applicable industries are:
- Textiles
- Nonwovens
- Healthcare
- Outdoors
- Safety Equipment
Plus a wide range of other industries.
For more information about applications please see our technical papers.
Features
- Versatile & User-Friendly software for:
- Fully Automated Tests
- Manual Control of all System Components
- Data Collection, Storage, Analysis, & Reporting
- Customized Testing Parameters
- Flow Ability to create a wide range of testing conditions, including:
- Rate/Residence Time
- Static or Dynamic Pressure Gradients
- Static or Dynamic Temperature Gradients
- Applicable for Wide variety of Sheet-like materials
- High Measurement speed, stability, & resolution
- Interchangeability of System Components
- Durable Stainless Steel Construction
| Gas | Temperature ° C | Humidity | Concentration Difference (%) | Transfer Rate (scc/min -cm2) |
| O2 | 24 | 48.3 | 2.3872 | 0.2464 |
| CO2 | 24 | 48.3 | 1.7278 | 0.1428 |
Specifications
- Gas Concentration Measurement:
- Lowest Detectable Partial Pressure: 1x10-14mbar
- Mass Range: 1-100 amu; 1-200 amu; 1-300 amu
- Resolution: 0.5 - 2.5 amu
- Lowest Detectable Concentration: 0.1PPM (+/- 10 PPB accuracy)
- Volumetric Flow Rate Measurement:
- Maximum Total Flow Rate: 530 scc/min (+/- 1% accuracy)
- Maximum Test Gas Flow Rate: 30 scc/min (+/- 1% accuracy)
- Differential Pressure Measurement:
- Range: +/- 1335 Pa (+/- 5 Pa)
- Temperature Measurement:
- Range: -10° - 100° C (+/- 0.5%)
For more information see our Gas Permeation Analyzer Brochure, Permeameter Brochure, and Characterization of Pore Structure Brochure.
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