Extended range of filter calibration standards
A
Whitehouse Scientific product story
Edited by the Processingtalk editorial team
Oct 21, 2005
Whitehouse Scientific has further extended its range of filter pore size standards, with the inclusion of standards down to 0.5 micron
Whitehouse Scientific has further extended its range of filter pore size standards, with the inclusion of standards down to 0.5 micron.
These narrow distribution glass microspheres are used to 'challenge' filter media.
Analysing the proportion of spheres passing through the filter enables determination of the maximum pore sizes present.
For pore sizes of greater than around 15 microns, the percentage of dry microspheres passing through can be related directly to pore size, simply using a calibration graph, and without the need to use particle size analysis.
For pore sizes of below about 15 microns a wet suspension method is used and this extends the range to submicron regions.
All measurements provide unambiguous results and are traceable to international standards of length, such as NIST.
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