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    Home > Active Ingredient News > Drugs Articles > How Particle Counters Work

    How Particle Counters Work

    • Last Update: 2022-09-09
    • Source: Internet
    • Author: User
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    Particle counter is a gas industry term
    .

    Usually divided into laser particle counters or condensed nucleus particle counters
    .

    The particle counter is an instrument for testing the particle size and distribution of air dust particles.
    It was developed from a microscope and has experienced microscopes, sedimentation tubes, sedimentation instruments, centrifugal sedimentation instruments, particle counters, laser air particle counters, condensation nucleus particle counters, Multi-channel particle counters and other processes are widely used in various provincial and municipal drug inspection institutes, blood centers, disease control centers, quality supervision institutes and other institutions, the electronics industry, pharmaceutical workshops, semiconductors, optical or precision machining, plastics, painting, hospitals, inspections such as production enterprises and scientific research departments
    .

    The He2Ne laser particle counter can analyze the particle impurities with a particle size of 011μm in the gas; the Ar2Kr laser particle counter can analyze the particle impurities with a particle size of 0105μm, and there are particle counters that can detect 01005μm in pure gas
    .

    Condensation particle counters can measure nanometer-sized particles
    .

    When the particle counter measuring instrument is sold, it is necessary to obtain a legal calibration certificate
    .

    A particle counter is an instrument that uses the principle of light scattering to count dust particles
    .

    Light scattering is related to factors such as particle size, light wavelength, particle refractive index, and particle absorption characteristics of light
    .

    However, in terms of scattered light intensity and particle size, there is a basic law that the intensity of scattered light by particles increases with the increase of the surface area of ​​the particles
    .

    The dust-laden gas in such a flow passes through a beam of strong light, so that the particles emit scattered light, which is projected onto the photomultiplier tube through the condenser 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 as a function of the intensity of light scattered by the particle as a function of particle size
    .

    In this way, the size of the particles can be inferred only by measuring the intensity of the scattered light, which is the basic principle of the light scattering particle counter
    .

     
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