Laser Diffraction Powder Coating Accurate Particle Size Analyser Ideal For DLS Dynamic light Scattering

Theory: Dynamic light scattering technology NS-90 nanometer particle size analyzer uses dynamic light scattering technology to measure particle and molecular size. Random Brownian motion of particles in liquid is caused by collision of surrounding solvent molecules. Small particles move faster in liquid, while large particles move relatively slowly. This kind of motion has been going on all the time, so if we take a short time interval to take the motion "image" of the sample, we can see how much the particle has moved, and we can calculate how big it is. In the same time, if the displacement is small and the particle position is close, the particles in the sample are larger; on the contrary, if the displacement is large and the particle position changes greatly, the particles in the sample are smaller. Dynamic light scattering (DLS), also known as photon correlation spectroscopy (PCS), is a method to determine the size of particles by using the relationship between diffusion velocity and particle size. NS-90 nanometer particle size analyzer uses 90℃ dynamic light scattering technology, utilizes photoelectric detector to measure the scattering light intensity fluctuation signal generated by Brownian motion of particles in the sample, then obtains the Correlation Function through the digital correlator, finally uses Stokes Einstein equation to calculate the particle size and distribution. The particle size measured by this technology is the diameter of hard sphere diffused at the same speed as the measured particle.

[Software with rich functions optimizes user experience]

Standard operation procedure (SOP) is provided to simplify routine measurement; the best settings of various samples are automatically adjusted; the operation is simple, without collimation, correction or maintenance; intelligent, the quality of data report can be automatically judged.

[High performance detector] The sensitivity of APD detector with high efficiency is much higher than that of PMT. High cost but guaranteed optimal test performance.

[Research-level digital correlator] Using high-speed digital correlator, 4000 channels, sampling time as low as 25ns.

[Stable laser source and optical path system] The high stability He-Ne gas laser is used to ensure the data repeatability. The wavelength is 633nm and the power is 4 mW. 50 mW, 532nm solid-state laser can also be selected for the sample that cannot be detected by standard 633nm laser. The laser attenuator can be adjusted automatically in the dynamic range of 300000:1.

[Accurate internal temperature control system] The independent cycle temperature control tank can be set arbitrarily in the range of 0 – 90℃, and its control accuracy can reach 0.1℃, ensuring high reproducibility. 120℃ temperature control tank is also optional. Software functions: 1. Using advanced software technology and interface, easy to operate. 2. Full automatic setting and measurement: only the simplest training is needed to set up the instrument, including the position of sample cell, data recording, analysis and result display. 3. Support SOP standard operation procedures to ensure the consistency of operation and data repeatability. 4. Complete evaluation of measurement data: the instrument software can automatically judge the quality of the data report according to the test conditions. 5. Printing or screen display report is easy to use; including report designer, you can customize different reports according to different needs by selecting graphics and input parameters at the specified location. 6. The sample data and results are stored in the measurement file to facilitate data comparison. 7. Data analysis: the data is given in the form of graph or table, and the distribution algorithm is suitable for all kinds of samples, including single dispersion samples, wide distribution samples and multi-mode samples. Support: – temperature trend analysis – time trend analysis – trend analysis of selected parameters – full range statistics