Product Overview
The NKT‑N9 series nanoparticle size analyzers are specifically
designed for the characterization of nanoparticle size and size
distribution. Based on the principles of Dynamic Light Scattering
(DLS) and Photon Correlation Spectroscopy (PCS) technology, the
instrument uses a laser to illuminate nanoparticles uniformly
dispersed in a sample cell.
The detection fiber receives, at a 90° angle, the dynamic scattered
light whose intensity fluctuates over time due to the Brownian
motion of the sample particles. This light is transmitted to a
photomultiplier tube (PMT), which converts the optical signals into
discrete pulse signals. A digital correlator then performs
autocorrelation calculations to obtain the autocorrelation curve of
the sample. Combined with mathematical methods, the diffusion
coefficient of the particles is derived, and finally the particle
size and size distribution are calculated according to the
Stokes‑Einstein equation.
Scope of Application
The NKT‑N9 laser particle size analyzer is widely used for particle
size characterization as well as dispersion stability and system
stability analysis of organic or inorganic nano‑emulsions, powders,
polymers, micelles, virus antibodies, proteins, and other samples
in fields such as:
- New materials
- Medicinal products
- Bioengineering
- Life sciences
- Chemical engineering
- Coatings
- Food safety
Technical Features
All‑Fiber Test Optical Path – High Sensitivity
The test optical path, constructed with a high‑performance,
low‑noise fiber‑coupled semiconductor laser and an all‑fiber
dynamic scattered light receiving system, uses a low dark count,
high‑sensitivity HAMAMASTU photomultiplier tube (PMT) as the
photodetector. This gives the entire test system extremely high
sensitivity and signal‑to‑noise ratio, laying the foundation for
test accuracy and high resolution.
High‑Speed Digital Correlator – High Resolution
The independently developed high‑speed digital correlator is used
as the core device for signal processing. It acquires dynamic
scattered light intensity in real time at high speed and performs
autocorrelation calculations. It features a signal resolution
capability of 6 ns, a data processing speed of hundreds of
megahertz, and a linear dynamic range greater than 10¹¹, ensuring
the integrity of autocorrelation curves for particles of different
sizes across the full measurement range.
Full‑Range Calibration and Validation – Ensuring Test Accuracy
Multiple national particle size reference materials are used for
calibration and validation across the full measurement range, with
test accuracy errors all below 1 %.
High‑Precision Temperature Control
The semiconductor laser, equipped with automatic temperature
control technology, ensures stable and reliable laser output. The
high‑precision temperature control system keeps the tested sample
in the sample cell at a constant temperature throughout the
measurement process, avoiding test deviations caused by changes in
medium viscosity and particle Brownian motion velocity due to
temperature variations, thereby ensuring reliable and stable test
results.
One‑Click Dual Wavelength Switching – Wider Applicability
Using dual‑wavelength (λ1 = 520 nm, λ2 = 405 nm) fiber‑coupled
semiconductor lasers as the light source overcomes the limitation
that a single‑wavelength laser cannot test light‑absorbing samples,
enabling effective particle size testing for full‑color‑range
samples. One‑click switching between the two wavelengths makes the
instrument applicable to a wider range of samples.
For further information or to discuss your specific requirements,
please contact us directly.
