Polyacrylamide Manufacturer in China | Shouxin Advanced Polymer Sciences Co., Ltd.
Shouxin Advanced Polymer Sciences Co., Ltd. is a leading polyacrylamide (PAM) brand and global supplier based in China.09,18,2026 7 views
Working principle and selection of laser particle size analyzer
Laser particle size analyzer refers to an instrument that analyzes particle size by analyzing the spatial distribution (scattering spectrum) of diffraction or scattered light of particles. According to the stability of the energy spectrum, it can be divided into static light scattering particle size analyzer and dynamic light scattering laser particle size analyzer. Why does laser use laser as the light source? Laser is a light source with good collimation and monochromaticity. Due to its monochromaticity, when particles enter the laser beam, clear light scattering spectra can be obtained, which are related to particle size.
What are the advantages of semiconductor lasers?
Laser is one of the important inventions of the 20th century, and semiconductor lasers are the product of advances in laser technology in the past two decades. Its advantages include small size, light weight, high efficiency, low voltage, long lifespan, and strong earthquake resistance. The laser emitted by early semiconductor lasers had poor monochromaticity and could not be used as a light source for detection instruments. With the advancement of technology, the monochromaticity of the laser emitted by high-quality semiconductor lasers has approached or reached the level of helium neon lasers, and has replaced helium neon lasers in many application fields. Due to the numerous advantages of semiconductor lasers, most foreign brands of laser particle size analyzers now use semiconductor lasers as light sources.
Static light scattering laser particle size analyzer
The energy spectrum is a stable spatial distribution. Mainly suitable for testing micron sized particles, with improvements, the measurement limit can also be extended to tens of nanometers.
Laser particle size analyzer based on dynamic light scattering principle
Based on the speed of particle Brownian motion, the size of nanoparticles can be analyzed by detecting the dynamic light scattering signals at one or two scattering angles, and the energy spectrum changes rapidly over time. The particle size analyzer based on dynamic light scattering principle is only suitable for testing nanoscale particles
Sedimentation particle size analyzer
The sedimentation particle size analyzer is based on the principle of Stokes sedimentation law
The principle of laser particle size analyzer measurement is that a beam of laser emitted by the laser is filtered, expanded, and calibrated to become a parallel beam of light. In the absence of the parallel beam shining on the particles, the beam passes through the Fourier lens and converges on the focal plane to form a very small and bright spot - the focal point. As shown in the following figure:
Principle diagram of laser particle size analyzer measurement [4] When particles are uniformly placed into a parallel beam in a specific way, the laser will undergo scattering phenomenon, and a part of the light will diffuse outward at a certain angle to the optical axis. Both theory and practice have proven that the scattering angle of scattered light caused by large particles is small, and the smaller the particle, the larger the scattering angle of scattered light. These scattered lights from different angles will form a series of halos on the focal plane after passing through the Fourier lens, and the alternating light and dark spots composed of these halos are called Airy spots. Airy contains rich granularity information, which can be simply understood as halos with larger radii corresponding to smaller particle sizes, and halos with smaller radii corresponding to larger particle sizes; The light energy size of halos at different radii contains information about the content of particles of that size. In this way, we install a series of light receivers on the focal plane, convert the light signals scattered by particles of different sizes into electrical signals, and transmit them to the computer. Then, we use Mie scattering theory to mathematically process these signals through the computer to obtain the particle size distribution.
Let's take the BJ03-S01 laser particle size analyzer as an example to introduce the dry process laser particle size analyzer
Technical parameters of BJ03-S01 laser particle size analyzer
Test range: 0.1 μ m to 500 μ m
Light source: semiconductor laser (wavelength 635 nm, power 3mw, service life over 25000 hours)
Testing method: Wet testing
Sample concentration: 0.5 ‰~1% (related to the specific gravity, particle size, and refractive index of the sample)
Test time: less than 1 minute/time, excluding sample dispersion time
Scanning speed: 2000 times/second
Repetitive error: ≤ 1%
Power supply: AC 220V ± 10% 50Hz or 60Hz, power: 80W
Microcomputer interface: Standard RS-232 serial interface
Operating System: Can run on all versions of the Windows operating system
3、 Product features of BJ03-S01 laser particle size analyzer
(1) Circular sample feeder (optional accessory)
The circulation sampler has functions such as ultrasound, circulation, stirring, and ultrasound timing The circulation system adopts a peristaltic pump method, which does not cause any contamination to the sample and ensures the accuracy of the test data. The BJ03-S01 laser particle size analyzer has two injection methods: a micro sample cell and a circulating sample cell. The micro sample cell is specially designed for samples that require organic solvents as the medium; The circulating sample pool is usually used to test samples of water as a medium, and these two injection methods do not need to be exchanged, making them very convenient to use (2) Powerful software system for laser particle size analyzer
The BJ03-S01 laser particle size distribution analyzer system is a combination of optical, mechanical, electrical, and computer systems
As a high-tech product, data processing is completed by computer analysis system software, and the output of test reports is completed by printers. (3) Integrated optical path technology for laser particle size analyzer *
Optimized inverse Fourier transform design, combined with an integrated optical path structure, makes the optical path more stable for long-term use without the need for adjustment; Advanced mechanical equipment
Design and processing techniques to make the structure of the instrument more compact and reasonable; Streamlined design, beautiful and elegant, more convenient to use and maintain; Effective shielding and anti-interference technology,
Make the electrical and other performance of the instrument more stable. (4) Laser particle size analyzer with high sensitivity and large angle photoelectric receiver array
*The design of the photoelectric receiver array effectively improves the resolution of the instrument. The main photoelectric receiver consists of 71 photovoltaic cells with a maximum detection angle of 21.5 °;
A lateral photoelectric receiver with non-uniform cross arrangement, consisting of 5 photovoltaic cells, with the largest lateral angle reaching 75 °. (5) Laser particle size analyzer is long-lasting and durable
Adopting a wavelength of 635nm and a power of 3mw semiconductor full laser, the service life is over 25000 hours
The efficiency has improved the use and storage time of the laser particle size analyzer. (6) The H. Golub distribution inversion algorithm
The BJ03-S01 laser particle size analyzer laser particle size testing system * adopts advanced full Mie scattering theory as the basis, and uses excellent H. Golub distribution inversion algorithm, combined with *'s instrument hardware design, so that the samples you test, whether single distribution or mixed, can make the test data more and faster.
(7) The output format of the report form is flexible and can be edited according to user needs, including cumulative particle size distribution data and curves, interval particle size distribution data and histograms, and various typical particle size values.
(8) Complies with the standard ISO13320-1
In order to meet users' requirements for the accuracy and repeatability of test results and traceability, the HYL system
The laser particle size analyzer * complies with the ISO13320-1 standard. Each laser particle size analyzer is strictly tested
The inspection of national standard substances requires all indicators to be qualified before they can be put into the market.
What are the advantages of semiconductor lasers?
Laser is one of the important inventions of the 20th century, and semiconductor lasers are the product of advances in laser technology in the past two decades. Its advantages include small size, light weight, high efficiency, low voltage, long lifespan, and strong earthquake resistance. The laser emitted by early semiconductor lasers had poor monochromaticity and could not be used as a light source for detection instruments. With the advancement of technology, the monochromaticity of the laser emitted by high-quality semiconductor lasers has approached or reached the level of helium neon lasers, and has replaced helium neon lasers in many application fields. Due to the numerous advantages of semiconductor lasers, most foreign brands of laser particle size analyzers now use semiconductor lasers as light sources.
Static light scattering laser particle size analyzer
The energy spectrum is a stable spatial distribution. Mainly suitable for testing micron sized particles, with improvements, the measurement limit can also be extended to tens of nanometers.
Laser particle size analyzer based on dynamic light scattering principle
Based on the speed of particle Brownian motion, the size of nanoparticles can be analyzed by detecting the dynamic light scattering signals at one or two scattering angles, and the energy spectrum changes rapidly over time. The particle size analyzer based on dynamic light scattering principle is only suitable for testing nanoscale particles
Sedimentation particle size analyzer
The sedimentation particle size analyzer is based on the principle of Stokes sedimentation law
The principle of laser particle size analyzer measurement is that a beam of laser emitted by the laser is filtered, expanded, and calibrated to become a parallel beam of light. In the absence of the parallel beam shining on the particles, the beam passes through the Fourier lens and converges on the focal plane to form a very small and bright spot - the focal point. As shown in the following figure:
Principle diagram of laser particle size analyzer measurement [4] When particles are uniformly placed into a parallel beam in a specific way, the laser will undergo scattering phenomenon, and a part of the light will diffuse outward at a certain angle to the optical axis. Both theory and practice have proven that the scattering angle of scattered light caused by large particles is small, and the smaller the particle, the larger the scattering angle of scattered light. These scattered lights from different angles will form a series of halos on the focal plane after passing through the Fourier lens, and the alternating light and dark spots composed of these halos are called Airy spots. Airy contains rich granularity information, which can be simply understood as halos with larger radii corresponding to smaller particle sizes, and halos with smaller radii corresponding to larger particle sizes; The light energy size of halos at different radii contains information about the content of particles of that size. In this way, we install a series of light receivers on the focal plane, convert the light signals scattered by particles of different sizes into electrical signals, and transmit them to the computer. Then, we use Mie scattering theory to mathematically process these signals through the computer to obtain the particle size distribution.Let's take the BJ03-S01 laser particle size analyzer as an example to introduce the dry process laser particle size analyzer
Technical parameters of BJ03-S01 laser particle size analyzer
Test range: 0.1 μ m to 500 μ m
Light source: semiconductor laser (wavelength 635 nm, power 3mw, service life over 25000 hours)
Testing method: Wet testing
Sample concentration: 0.5 ‰~1% (related to the specific gravity, particle size, and refractive index of the sample)
Test time: less than 1 minute/time, excluding sample dispersion time
Scanning speed: 2000 times/second
Repetitive error: ≤ 1%
Power supply: AC 220V ± 10% 50Hz or 60Hz, power: 80W
Microcomputer interface: Standard RS-232 serial interface
Operating System: Can run on all versions of the Windows operating system
3、 Product features of BJ03-S01 laser particle size analyzer
(1) Circular sample feeder (optional accessory)
The circulation sampler has functions such as ultrasound, circulation, stirring, and ultrasound timing The circulation system adopts a peristaltic pump method, which does not cause any contamination to the sample and ensures the accuracy of the test data. The BJ03-S01 laser particle size analyzer has two injection methods: a micro sample cell and a circulating sample cell. The micro sample cell is specially designed for samples that require organic solvents as the medium; The circulating sample pool is usually used to test samples of water as a medium, and these two injection methods do not need to be exchanged, making them very convenient to use (2) Powerful software system for laser particle size analyzer
The BJ03-S01 laser particle size distribution analyzer system is a combination of optical, mechanical, electrical, and computer systems
As a high-tech product, data processing is completed by computer analysis system software, and the output of test reports is completed by printers. (3) Integrated optical path technology for laser particle size analyzer *
Optimized inverse Fourier transform design, combined with an integrated optical path structure, makes the optical path more stable for long-term use without the need for adjustment; Advanced mechanical equipment
Design and processing techniques to make the structure of the instrument more compact and reasonable; Streamlined design, beautiful and elegant, more convenient to use and maintain; Effective shielding and anti-interference technology,
Make the electrical and other performance of the instrument more stable. (4) Laser particle size analyzer with high sensitivity and large angle photoelectric receiver array
*The design of the photoelectric receiver array effectively improves the resolution of the instrument. The main photoelectric receiver consists of 71 photovoltaic cells with a maximum detection angle of 21.5 °;
A lateral photoelectric receiver with non-uniform cross arrangement, consisting of 5 photovoltaic cells, with the largest lateral angle reaching 75 °. (5) Laser particle size analyzer is long-lasting and durable
Adopting a wavelength of 635nm and a power of 3mw semiconductor full laser, the service life is over 25000 hours
The efficiency has improved the use and storage time of the laser particle size analyzer. (6) The H. Golub distribution inversion algorithm
The BJ03-S01 laser particle size analyzer laser particle size testing system * adopts advanced full Mie scattering theory as the basis, and uses excellent H. Golub distribution inversion algorithm, combined with *'s instrument hardware design, so that the samples you test, whether single distribution or mixed, can make the test data more and faster.
(7) The output format of the report form is flexible and can be edited according to user needs, including cumulative particle size distribution data and curves, interval particle size distribution data and histograms, and various typical particle size values.
(8) Complies with the standard ISO13320-1
In order to meet users' requirements for the accuracy and repeatability of test results and traceability, the HYL system
The laser particle size analyzer * complies with the ISO13320-1 standard. Each laser particle size analyzer is strictly tested
The inspection of national standard substances requires all indicators to be qualified before they can be put into the market.
