Determining the particle size of products is a relevant parameter in many areas and production steps. There are several methods for determining the particle size. Which one is chosen depends on the particles and samples themselves. 3P Instruments offers the following techniques: Laser diffraction for particles from the upper nanometer to the millimeter range; Dynamic light scattering for small nanoparticles down to the lower micrometer range; Acoustic spectrometry for measurements in highly concentrated dispersions; Dynamic image analysis for determination of different particle size parameters.
A main parameter for the charaterization of droplets in emulsions or particles in suspensions is the particle size distribution. We offer a variety of different instruments and methods for tackling different challenges in applications, no matter if it is quality control or research and development.
Bettersizer S3 (Plus):
Particle size and particle shape 0.01 – 3500 µm
Bettersizer 2600: Particle size 0.02 – 2600 µm
Bettersizer ST:
Particle size measurement 0.1 – 1,000 µm
Dynamic light scattering (DLS) is applied in measuring particle sizes on a nano- and submicrometer scale.
Particle size analysis 0.3 nm – 15 µm
The acoustic spectrometers of the DT series are particle size measuring devices that have been developed especially for the characterization of (original) concentrated dispersions and nano- or submicron particles. In contrast to optical methods in transmission, acoustic spectrometry is suitable for suspensions or emulsions up to a concentration of approx. 60 % by volume, regardless whether transparent glass particles or opaque carbon black particles. No special sample preparation is required and the sample can – if stable – be measured at rest, stirred or continuously moved by means of a peristaltic pump, for example.
DT-100 and DT-110 are particle size analyzers based on acoustic spectrometry, which work on the basis of ISO 20998-1. The technology is the same, DT-100 is designed for sample volumes > 15 ml (stable dispersion), DT-110 for very small volumes from approx. 5 ml. Details on the devices can be found under DT-100/DT-110.
DT-1202 is based on the DT-100 and is additionally equipped with a zeta potential probe based on electroacoustic technology (ISO 13099-1 and ISO 13099-3). DT-1210, on the other hand, is based on the DT-110 and is equipped with the same zeta potential probe. In their basic configuration, both devices therefore enable the measurement of both the particle size distribution and the zeta potential of originally concentrated dispersions. Details on these measuring systems can be found under DT-1202/DT-1210.
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Particle size 1nm – 1000 µm (ISO 20998-1) | Particle size 1nm – 1000 µm (ISO 20998-1) |
The particle size of a real particle is often difficult to define by a single value, with the exception of perfectly spherical particles. The more misshapen a particle is, the more likely the question arises: what is the correct particle size? Dynamic image analysis can be used to determine various particle size parameters, as well as additional shape parameters. The analyses can be carried out in a dispersing medium or dry in free fall.
Particle size and particle shape 2 – 10000 µm
Particle size and particle shape 0.01 – 3500 µm
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