How to choose the shading ratio of laser particle size analyzer

The laser particle size analyzer is an instrument that analyzes particle size through the spatial distribution of particle diffraction or scattered light (scattering spectrum). The test process is not affected by the factors such as temperature changes, medium viscosity, sample density and surface state. As long as the sample to be tested is evenly displayed in the laser beam, accurate test results can be obtained.

The laser particle size tester faces a choice of shading ratio during the test process. Generally speaking, shading ratio refers to the concentration of the sample suspension configured when using the laser particle size analyzer to test the sample. The correct choice of shading ratio is an important step in the particle size test process of the laser particle size analyzer. Whether the shading ratio is appropriate or whether the concentration of the sample to be tested is appropriate is closely related to the accuracy and representativeness of the particle size measurement results.

For coarse samples, the shading ratio can be selected to be higher, such as 10~20%, and normally it is 5~20%. For ultra-fine samples, the shading ratio of the sample can be appropriately lowered, but generally not more than 40%. But ultimately it is necessary to find the optimal shading ratio value for the corresponding sample test through repeated experiments.