The ANALYSETTE 28 ImageSizer for Effective Particle Analysis of Even Smaller Particles

Sieving is a reliable method for assessing particle sizes and particle distribution in a variety of granular materials.

These materials can be both organic and non-organic and include soils, grains, seeds, sands, granite, coal and crushed rocks. As the particle size distribution is vital for understanding a granular material’s performance it is also useful for analysing manufactured products.

The lower limit of effectiveness of a sieve for a dry powder is around (150μm); a #100 mesh. This is because of physical constraints: surface attraction occurs between the particles and the material of the sieve, and also between the particles themselves, and this requires increased mechanical energy as the size decreases. Another drawback of sieving is connected to the shape of the particles, which provides the best results
with round particles.

The presence of elongated or flat particles will diminish the accuracy of mass-based results.

An excellent alternative to sieving is provided by the ANALYSETTE 28 ImageSizer Particle Sizer from FRITSCH. The ANALYSETTE 28 ImageSizer uses Dynamic Image Analysis, a fast and cost effective alternative to sieving. Dynamic Image

Analysis is a way of taking the advantages of microscopic evaluation and then turbo-charging them, through automation, to produce 30 quantifiable images per second.

Sample material is simply poured into the ANALYSETTE 28’s funnel and conveyed automatically by a controlled feeder to the falling chute. From there the sample falls past the LED strobe light and the high-performance 5 megapixel industrial camera.

This has a heavy-duty design with lenses optimised for industrial use. It is hermetically sealed, protecting against the material being measured and any moisture. Particle sizes from 20 mm, right down 20 μm, over the full spectrum of shapes, can be recorded for later analysis. The sample remains totally unaffected by the process and the collecting vessel is easily cleaned.

With a direct Ethernet-computer connection rapid data transmission is possible and the evaluation software ISS will then display each particle record clearly as a data point in what is termed the FRITSCH Cloud.

Important morphological information is manifest by the particle’s position in this cloud. You can then choose the parameters of most importance to you, whether it’s convexity as a function of the particle cross section, the aspect ratio or sphericity in regards to the minimum feret diameter.

The ease of use, speed, and 20 μm lower particle size limit, considerably smaller than the 150 μm sieve lower limit, makes the ANALYSETTE 28 ImageSizer Particle Sizer from Fritsch the perfect alternative to sieving.

Date added: 2015-05-25 14:30:31