A Guide To Choosing A Particle Sizer

By Bruce B. Weiner Ph.D

The choice of a particle size analyzer has never been more difficult. There are several techniques from which to choose and variations within each technique. Sales literature claims of specification and performance have become highly inflated, confusing the first-time buyer; the result has been to hinder and not help the decision making process. Many particle sizing instruments were originally designed to address specific problems. Although some have found additional uses, there is still some truth to the notion that certain techniques are best suited for particular tasks. The idea that one instrument will suit every particle sizing need, and hence solve all problems, is not supported in practice.

This guide does not specifically address imaging problems, shape analysis, single particle counting, nor sizing of airborne particles. Examples are drawn from particle sizing in liquids where the amount of material is not of primary concern; the "dirty water" or microcontamination problem is excluded.

This document is a brief summary based on many years of experience with the modern methods of particle size analysis; it is not definitive. New techniques and new applications of old techniques appear at an ever increasing rate.Yet, the concepts presented here are general enough to be of value for several years to come. The author would welcome any comments you may have and is always available to answer any specific questions.