Liquid-borne sub-micrometer particle counting recommendation dispels common miconception

November 2, 2011 — A new Recommended Practice (RP), IEST-RP-CC042.1: Sizing and Counting of Submicrometer Liquid-Borne Particles Using Optical Discrete-Particle Counters, is now available from the Institute of Environmental Sciences and Technology (IEST). Liquid-borne particle measurement involves many technical challenges that can substantially affect results in both sizing and counting of particles. This first-edition RP, published by the IEST Contamination Control Division, is intended as a single source covering those challenges and solutions, and provides a handy reference for professionals in this field.

Also read: ISO Cleanroom standards update

A liquid-borne particle counter (LPC) uses light to detect particles suspended in a liquid medium. This RP focuses on LPCs that use a light-scattering technology to directly measure the amount of light scattered by particles to obtain information on the concentration and the size distribution of those particles. This technology is predominantly used to detect low concentrations of particles ranging in diameter from 0.05 to 20


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