Sieving instrument

A sieving instrument, also called a sieving machine or sieve tower, is used for sieve analysis. A method of particle measurement technology for determining the particle size distribution. In sieving with a sieve tower, several test sieves (rarely also called test sieves) are arranged one above the other and clamped onto a sieve machine. The test sieves each consist of a sieve bottom and the sieve frame. The mesh sizes of the individual test sieves are descending from top to bottom. When carrying out the sieve analysis, the sample to be analyzed is placed on the coarsest test sieve and subjected to a defined movement for a specified time – exactly what this looks like depends on the sieving method selected. The particle size distribution of the sample is then determined by weighing out the residues on the individual test sieves. Sieving makes it possible to characterize particle mixtures with sizes ranging from 20 µm to several centimeters.