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During particle sizing, the relative value of shading rate is used to represent the concentration of suspension. The shading rate is determined by the number of particles in the suspension: the more p...

NIB powder has strong magnetic properties and is easy to agglomerate; so cannot be tested by wet dispersion. The dry dispersion can overcome the agglomeration caused by magnetism through the instantan...

Refractive index is the ratio of light speed in vacuum and light speed in other materials. The higher the refractive index of the sample, the greater the refractive ability of incident light.Absorptiv...

A laser beam emitted by the laser becomes a parallel beam after filtering, expanding, and quasi value. When no particles are illuminated, the parallel beam passes through the Fourier lens andconverges...

SOP is short for Standard Operation Program. It is now available in smart laser particle sizing instruments, facilitates operation automation and standardization, and is used to achieve 'one-click' operation.

Shading ratio refers to the percentage of light scattered and absorbed by particles, which is used to represent the optical concentration of suspension in laser particle sizing.

'Concentration' displayed in particle size distribution measurement usually indicates the intensity of the received light signals, which is related to the number of particles, usually called 'optical ...

Mie scattering theory is induced from Maxwell's electromagnetic theory. It describes the analysis to the mechanism of light scattering from a smooth sphere.

Resolution is defined as the minimum difference between two samples that can be effectively distinguished by a laser particle size analyzer. As important as repeatability and accuracy, resolution is o...

Background status could help to estimate whether the laser particle size analyzer is running normally. If the background value >4 or the column heights in the histogram are uneven, it indicates poo...

There are two methods to control shading ratio. The first method is multiple sampling: adding small amounts of samples for multiple times and observe the changing of shading ratio. When reach the pre-...

Helium-neon laser is one of the earliest, most mature and most widely used lasers. The gain medium of the laser, as suggested by its name, is a mixture of helium and neon gases, in approximately a 10:1 ratio, contained at low pressure in a glass envelope.

The distance between the small angle detectors and the detector center is very small (about 100μm). The main beam may deviate from the detector center to the small angle detectors, due to factors suc...

There are many factors affecting the resolution of laser particle size analyzers:(1) The more photodetectors there are, the higher the resolution;(2) Inverse algorithm: good inverse algorithm leads to...

To have good background status, the laser particle size analyzer should simultaneously satisfy the following five points: low value (1-4), short length (within 20 channels), sloping shape (decreasing ...

Ultra-fine and nano-sized powder materials are the research and production trend of modern powder materials. In order to meet the requirement of measuring these particles, the measurement range of las...

In general, particle sizing is realized through the system recognition and reception of optical signals. The intensity of the light signal is determined by the number of particles in the suspension.Ta...

Semiconductor lasers, also known as laser diode (LD), are one of the most recent developments in semiconductor physics in the 1980s. The advantages of semiconductor lasers are: small volume, lightweig...

Background is optical signal formed on the detectors after the laser passed the sample cell with clean medium. The main cause for background signals is laser refraction/reflection when go through air,...

Angle of Repose: Under the static balance, the angle between the slope of a powder pile and the horizontal plane is Angle of Repose. It is measured when the powders fall to a surface via gravity and f...

Bulk density: fill the powder sample into a measuring cup, flatten the top, the ratio of the powder mass to the volume of the cup is defined as bulk density. It indicates the mass of the powder that c...

Mesh is the unit to measure the pore size of a sieve, defined as the number of pores per inch in a sieve. The larger the mesh, the smaller the pores. Because the standard in different countries varies...

(1) Instrument: whether the laser, detector, signal transmission system, control system, sampling system, and software work fine.(2) Operation process: background, shading, software parameters, medium...

For particle sizing instruments, the evaluation of reproducibility is important in several aspects:(1) to understand the long-term stability of the instrument;(2) to evaluate the stability of the samp...

Repeatability and reproducibility are two important factors for particle size analysis. So we must know what is reproducibility? What is the difference between repeatability and reproducibility?Reprod...

Repeatability is important evidence used to evaluate the current status of the instrument. Good repeatability indicates that all parts of the instrument, including laser, detector, signal transmission...

Several methods are commonly used to measure particle size. These methods include laser diffraction (mm, μm, nm), dynamic light scattering (nm), dynamic and static microscopic imaging (μm, size and ...

D50 is the corresponding particle size when the cumulative percentage reaches 50%. D50 is also called as the median particle diameter or median particle size. For example, for a powder sample with D50...

Particle size is one of the main characteristics of powder materials. It is associated with parameters such as cement reactions in water, attaching strength and coverage of coatings, capacity of lithi...

Particle size indicates how small (or big) a particle is. The unit is usually μm or nm. Mm could also be used for certain fields where the particles are relatively big. Diameter is usually used to de...