Nano particle size analyzer

 

Introduction:

LDY9N is our latest nanometer particle size analyzer based on the principle of dynamic light scattering by labmen instrument technology limited. It uses high-speed photon correlator and professional high-performance photomultiplier tube as the core device, which is of the future of fast, high resolution, repeatability and accuracy. It is the first choice for particle size measurement.

Main performance characteristics:

Advanced test principle: The instrument uses dynamic light scattering principle and photon correlation spectroscopy technology to determine the particle size according to the speed of Brownian motion in the liquid. The Brownian motion speed of the small particle is fast, and the speed of large particle Brownian motion is slow. When the laser beam is irradiated on the moving particles, the scattered light at a certain angle (90 degrees in the instrument) changes dynamically with time. The speed of the change is related to the speed of the Brownian motion of the particles in the liquid. Using photon correlation spectroscopy, the dynamic scattering spectra were statistically and correlatedly analyzed, and the particle size was calculated according to the Stokes-Einstein equation.

High sensitivity and signal-to-noise ratio: HAMAMATSU professional high-performance photomultiplier tube (PMT) with low dark count and high sensitivity is used as a detector. It has high sensitivity and signal-to-noise ratio for photon signals, thus ensuring test results high accuracy and high resolution;

Superior computing capabilities: Using PCS technology to measure nanoscale particle size, it must be able to resolve nanosecond signal fluctuations. The core component of the instrument is using high-speed photon correlator developed by an application-specific integrated circuit ASIC. It has a very high resolution of 6ns and a very high signal processing speed. It can collect photon numbers in real time and calculate correlation calculations, which lays the basis of the test accuracy;

Stable optical path system: The photon correlation spectrum detection system constructed by the combination of high-power semiconductor laser and optical fiber controlled by constant temperature, not only has small volume, but also has strong anti-interference ability and stability, ensuring repeated and stable test results;

High-precision temperature control system: The accuracy of the sample cell temperature control system and the laser temperature control system is up to ±0.1 °C, so that the sample to be tested and the laser source are in a constant temperature state throughout the test process, avoiding the influence of temperature changes on the test results, ensuring the test. Accuracy and repeatability;

Ultra-functional analysis software: The inversion algorithm in the analysis software adopts the accumulative method recommended by international standards and the current common non-negative least squares (NNLS) and Contin and other algorithms. The test results are similar to those of international authoritative products, which has good consistency;

The test is accurate and stable: the perfect combination of high-performance hardware and international standardized inversion algorithms has resulted in the accuracy and duplication of LDY9N test results, and its test accuracy and repeatability are higher than international standards.