Parameters of wet dry dual-use laser particle size analyzer

　　Dry wet dual-use laser particle size analyzerIt is a high-performance particle size analyzer, and the dry dispersion system adopts the Venturi dispersion effect to ensure that the powder is in a fully dispersed state when passing through the measurement window through methods such as shear, inertia, collision, etc. Even for difficult to disperse samples such as neodymium iron boron powder, it can obtain sufficient dispersion and accurate measurement results. The wet dry dual-use laser particle size analyzer adopts a specially designed large-sized high-sensitivity photodetector array manufactured by large-scale integrated circuit technology, with high resolution and good accuracy; Adopting a data processing approach based on the entire Mie theory and multiple distribution models; By adopting a series of technologies and manufacturing processes such as high-precision data transmission and processing circuits, this instrument has outstanding characteristics such as accuracy, reliability, fast testing speed, good repeatability, and easy operation. It is a new generation dry particle size testing instrument that integrates laser technology, computer technology, and optoelectronic technology.

The main principle of the wet dry dual-use laser particle size analyzer is that as a new type of particle size testing instrument, the laser particle size analyzer has been widely used in the fields of powder processing, application, and research. Its characteristics are fast testing speed, wide testing range, good repeatability and authenticity, easy operation, and so on.

1. The principle of particle size testing using laser method:

Laser particle size analyzer is used to test particle size distribution based on the physical phenomenon that particles can cause laser scattering. Due to the excellent monochromaticity and directionality of lasers, a parallel beam of laser will shine to infinity in unobstructed infinite space, and there is little divergence during propagation.

When a beam of light encounters particle obstruction, a portion of the light will undergo scattering, and the propagation direction of the scattered light will form an angle θ with the propagation direction of the main beam. Scattering theory and experimental results both tell us that the size of the scattering angle θ is related to the size of the particles, and the larger the particles, the smaller the θ angle of the scattered light produced; The smaller the particle, the larger the θ angle of the scattered light produced. In Figure 8, scattered light I1 is caused by larger particles; Scattered light I2 is caused by smaller particles. Further research indicates that the intensity of scattered light represents the number of particles of that size. In this way, by measuring the intensity of scattered light at different angles, the particle size distribution of the sample can be obtained.