Handheld laser dust particle counter definition - Database & Sql Blog Articles

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The handheld laser dust particle counter is a test instrument for the number of dust particles (ie, cleanliness) contained in a unit of air in a clean environment. Based on the principle of scattering of dust particles in the beam, it is a high-tech product integrating optical, precision machinery, electronics, and computer technology-level aerodynamics.

Handheld laser dust particle counter works

1. Gas industry terminology The term particle counting can be performed by a laser particle counter or a condensed nuclear particle counter. The He2Ne laser particle counter can analyze the particle impurities of 011μm particle size in the gas; the Ar2Kr laser particle counter can analyze the particle impurities of 0105μm particle size, and there is a particle counter of 01005μm in the ultra-high purity gas. The photoelectric dust particle counter is an instrument that performs dust particle counting using the principle of light scattering. A certain flow of dust-containing gas passes through a strong light, causing the particles to emit scattered light, which is projected onto the photomultiplier tube through a collecting lens, and the light pulse is converted into an electric pulse, and the number of particles is obtained from the number of pulses. The particle diameter is derived from the intensity of the scattered light of the particle as a function of particle size. The particle counter is an indispensable instrument in high purity or ultra high purity gas supply systems. The price is more expensive.

2. Working principle of laser dust particle counter The basic principle of laser dust particle counter is that the detection laser of optical sensor is scattered by the photosensitive element after being scattered by the dust particles and generates a pulse signal. The pulse signal is output and amplified, and then digital signal processing is passed. Compare the standard particle signal and compare the results with different parameters. Particles in the air scatter under the illumination of light. This phenomenon is called light scattering. Light scattering is related to particle size, wavelength of light waves, refractive index of particles, and absorption characteristics of light by particles. However, in terms of scattered light intensity and particle size, there is a basic rule that the intensity of the scattered light of the particles increases as the surface area of ​​the particles increases. In this way, as long as the intensity of the scattered light is measured, the size of the particles can be inferred. In fact, the intensity of the scattered light generated by each particle is very weak, which is a small pulse of light, which needs to be converted by the photoelectric converter to convert the light pulse into The electrical pulse with a large amplitude of signal is then further amplified and screened by the electronic circuit to complete the counting of a large number of electrical pulses. At this time, the number of electric pulses corresponds to the number of particles, and the amplitude of the electric pulses corresponds to the size of the particles. This is the basis of the light scattering laser dust particle counter.

Shangyu Star Equipment Co., Ltd.

Located in Daoxu Town, Shangyu District, Shaoxing City, Zhejiang Province, it is an enterprise integrating production, product research and development, processing and trade. The company's main products: drying box series, incubator series, laboratory muffle furnace series, distilled water series, as well as clean workbench, air shower, fume hood, biological safety cabinet and other complete purification equipment.

The company has a strong technical research and development team, a strong after-sales support service system, is the leader in China's laboratory complete sets of equipment manufacturers, welcome customers to buy.