New Method of Measuring Filter Pore Size Distribution

Whitehouse Scientific has developed a unique range of calibration microspheres for measuring the pore sizes of filters from over 1000 microns down to 0.1 micron. Different systems of challenge testing are used
depending on the filter cut points. Above 20 microns, a high speed dry Sonic Filter Tester is used, while a wet ultrasonic system takes the measurement down to 2 microns using a combination of microscopy and narrow size
distribution silica microspheres. In the submicron range a ‘Multimodal’ standard comprising of 10 non-overlapping latex microspheres in conjunction with a Disc Centrifuge can measure both filter cut points and pore size distributions.