The pore characteristics of products experiencing considerable stress during service could be appreciably different from those evaluated in the laboratory. This instrument provides a unique opportunity for evaluating the component under true service conditions. The instrument is invaluable for products such as filtration media and battery separators.
A fully wetted sample sandwiched between two porous and rigid plates is placed in the sample chamber. The plates are much more porous than the sample. Compressive stress is applied on the plates. Gas pressure behind the sample is increased. When the pressure is sufficiently high, the largest pore is emptied and gas starts to flow. With increase in pressure, smaller pores are emptied and the flow rate increases. The flow rate and pressure are measured using wet and dry samples. These data are used to calculate the effects of compressive stress on pore size and pore distribution. The Compression Porometer characterizes porous materials under conditions of their actual use.
The Automated Compression Porometer is designed to characterize the pore structure of a material under compression. Industries world-wide 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.
Applicable industries are:
For more information about applications please see our technical papers.
- Measures effects of compressive stress on the largest pore diameter (bubble point), the mean flow pore diameter, pore distribution, and permeability.
- Fully Automated
- Windows based software for data acquisition, storage and reduction
- Nondestructive test leaves material intact
- Compressive stress adjustable by the operator