Whitehouse Scientific to launch new range of filter testers at Interphex

Whitehouse Scientific will introduce a new range of narrow particle size distribution challenge microspheres for testing the efficiency of filters at Interphex 2005 (booth 183 - April 26-28; New York).

Starting at one micron, each grade of these glass microsphere standards is only a few microns in width. This allows them to provide an extremely sensitive means of determining the maximum pore size of all types of filter media.

For pore sizes up to about 20 microns, dilute suspensions are presented to the filter media and the particle sizes compared before and after the challenging process. Above 20 microns the test can be performed dry using sonic energy, with the pore size then simply read from a calibration graph.

A new range of standards for particle size image analyzers will also be introduced at the show.

Whitehouse Scientific has been producing precision glass microspheres for calibration for over 20 years, and is the highest ranking European certification laboratory for primary methods of particle size analysis.