The BGD 249 Laser Particles Size Analyzer is a new cost-effective laser particle size analyzer designed by our manufacturer. It is used to measure the particle size distribution of powder or latex.
Test Principle: Light is an electromagnetic wave. When light meets with particles on it way of traveling, the interaction between light and particles will result in deviations of part of the light, which is called light scattering. The bigger the scattering angle is, the particle size will be smaller, the smaller the scattering angle is, the particle size will be bigger. The particle analyzer instruments will analysis the particle distribution according to this physical character of the light wave.
Technical Specification
Reliable optical platform
Use horizontal straight light path layout, no reflecting prism, light path is stable and reliable
Good designability for base, good consistency of light path
Anti-moist ability of laser power module and the stability of electric are better
Modular construction design, maintenance is more convenient
The testing performance for small particles is improved
The all-in-one housing design, it’s dust-protected and water-proof.
Schematic diagram of optical path
Totally enclosed design of light path system, dust pollution and external light pollution can be prevented.
Light path adopts lens back Fourier transform structure
Optical source adopts He-Ne laser emitter which owns better monochromaticity, high coherence, small divergence angle and good stability compared to other laser emitters, we also adopt the patent design of integrated laser emitter which reduces heat distortion of laser tube and external mechanical vibration
For laser emitter, except for traditional detection of output power value, we add the stability test of output power.
Smooth processing technology is used to reduce the impact of power fluctuation to measurement
Constant current limit and filling process of laser tube are used to reduce the flash frequency to the minimum
Backward detector is added, the lower limit of measurement is extended to 0.1micron.
Spatial filter is fixed by powerful permanent magnet, the pinhole is not easy to shift under the disturbance of external force, so the stability of the optical path has been greatly improved. Besides, the new designed spatial filter eliminates the laser diffraction ring more effectively, the light background of the instrument is lower, optical energy data is more accurate, it is helpful to improve the testing capability for large particles
Detector array adopts unique scattered light detection around a sphere surface (DAS), the large angle detectors are placed in a spherical surface to get accurate focus of the large angle scattered light.
Advanced data collection and processing technology
New designed data collecting board uses 32 bit CPU from famous chip design company-ARM,the CPU has the advantages of high-effective signal processing capacity and low power consumption
Using 8-channel simultaneous sampling to sample 16 bit ADC, the sampling frequency of frame data can reach 1 kHz.
Using 64-channel simultaneous sampling technology and sample & hold switch with ultralow leakage current, the full scale accuracy can reach 0.15%
Easy to update the firmware and layout data, more convenient for maintenance and operation
Offset function of electric background, it can help to get more accurate optical energy data
Software
SOP standardization operating procedure function, analysis & testing process standardization
Multiple distribution models:Rosin-Ramler mode, general mode, enhanced mode, Single mode
Two report models:General purpose, statistics
Two accumulative directions: small to large, large to small
Data input function, and reports can be exported as Word, Excel format or other text format files
Multiple reports can be opened at the same time, easy to compare among reports
Report items can be set/ selected according to customers’ requirements, also can be set as fixed report format.
Users can define refractive index parameters by themselves, including real part and imaginary part (correspond to the absorption of sample)