Microflow Porometer
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Description
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 non-destructive. The Microflow Porometer is an asset to quality control and R&D environments.
Principles of Operation
In this instrument, a pressure transducer is located on the down stream of the sample and the time rate of pressure change in the known volume of the down stream side of the sample chamber is used to compute very small flow rates. Flow rate through a dry sample is measured as a function of differential pressure. The sample is fully wetted. Gas is then allowed to flow into the chamber behind the sample, at increasing amounts of pressure.
When the pressure reaches a point that can overcome the capillary action of the fluid within the pore (largest pore), the bubble point has been found. After determination of the bubble point, the pressure is increased and the flow is measured until all pores are empty, and the sample is considered dry.
Applications
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.
Applicable industries are:
For more information about applications please see our technical papers.
Features
- Samples with very low flow rate can be tested
- Very low permeability can be measured
- Fully automated
- Windows based simple operation
- Many optional features possible
Specifications
For more information see our Porometers Brochure and Characterization of Pore Structure Brochure.