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Current measuring techniques involve the use of vibrating sieves, which are laborious, offer poor repeatability and are dependent on the actual measuring procedure. Vibration tends to break up the largest particles (agglomerates), thus modifying the final outcome. Measuring results vary as a function of sample powder quantity, vibration time, sieve type and powder moisture content.
The GMS arranges the sample to be examined on a surface. Then, via a high-resolution digital camera linked to an optical enlargement system, the unit acquires a suitable quantity of images of the powder itself. Using a sophisticated algorithm to process the images, the GMS gives the particle size distribution of the sample. The thus-obtained data is free from the problems that affect vibro-sieve measurement. Repeatability is better, the procedure-dependent variations that occur with vibro-sieves are completely absent and the powder is examined “as is” without being modified by the vibration. Thanks to its graphic interface, the GMS provides comprehensive information and allows all measurements to be recorded on the built-in computer.
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