PARTICLE MEASUREMENT, STATE-OF-THE-ART, TRENDS NEEDS

An excellent overview of the various goals of particle technology, which have long extended far beyond particle size analysis, is provided by POWTECH. The following examples should serve to illustrate the scope of such measurements and the trends noted in this area: measurements for the monitoring of clean rooms; measurements supporting process engineering developments; and process analysis. There is wide range of instrumentation available for the assessment of dispersed product states. Based on proven principles these instruments are becoming more user friendly and available with improved data evaluation; the methods of evaluation are, unfortunately, still not clear to the user.The current trend is in two directions: 1) simultaneous acquisition of several measurements for more accurate determination of the required quantity or for determination of two different quantities and 2) on-line or in-line measurement, which has to be fast, economical, and safe.