HMKTest

201-12 What is the difference of particle size measurement between fisher sub sieve sizer (FSSS) and laser particle size analyzer (LPSA)?

201-12 what is the difference of particle size measurement between fisher sub sieve sizer (FSSS) and laser particle size analyzer (LPSA)?

The particle size result obtained by fisher sub sieve sizer is the average particle size value DSV, which is somewhat similar to the particle size result D(3,2) obtained by the laser particle size analyzer. However the average particle size meter actually carried out this test, while the laser particle size meter calculated D(3,2) on the premise that the particles were all circular after particle size distribution measurement. that is to say, the difference between circular particles is small, and the difference between irregular particles is large. In terms of measurement result, there is no comparability between the fisher sub sieve sizer and laser particle size analyzer. Because the principle of measurement is different. But in terms of the measurement of equicircular particles, both of the instrument can get satisfying test result.

Laser particle size analyzer, because the sample cannot one hundred percent dispersed into a particle, the actual measurement of the sample is a small group of particles, the particle size will generally be larger. The adsorption method is converted by the adsorption amount, because the particles must be agglomerated, so the results will be larger than the actual particle size. According to experience, the result of laser particle size meter is much larger. For example, AS-2011 Laser particle Size Analyzer and HMK-22 Fisher Sub Sieve Sizer, The actual sample particle size is 0.3-0.4 micron on average (electron microscope), fisher sub sieve sizer usually can measure from 1.0 to 1.5 microns, laser particle size analyzer can usually measure from 2 to 3 microns. Generally speaking, the laser particle size analyzer id greatly affected by external conditions, such as the choice and dose of dispersant, ultrasonic dispersion intensity and time, etc., the repeatability is not as good as that of fisher sub sieve sizer. The laser particle size is not used as a parameter in the process in industry.

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