Discover more about Dynamic Image Analysis in “the sample” vol.42.
Volume 42 of Retsch “the sample” magazine focuses on particle size characterisation with Dynamic Image Analysis.
Dynamic Image Analysis (DIA) is a modern high-performance method for the characterisation of particle size and particle shape of powders, granules and suspensions. RETSCH TECHNOLOGY’s optical analysers CAMSIZER P4 and CAMSIZER XT are based on this technology, covering a measuring range from 1 μm to 30 mm. Dynamic Image Analysis is used in many industries for quality control as well as in research & development. It increasingly replaces more established methods such as laser diffraction or sieve analysis.
Imaging techniques have a number of advantages over traditional methods such as sieve analysis or laser diffraction. Measurements are carried out on every single particle image resulting in the detailed determination of a variety of size and shape parameters. Thanks to the ability to analyse, for example, length, width, roundness or angularity of particles DIA provides much more information than alternative methods.
Analysers based on DIA are generally equipped with an optical system consisting of cameras, objective lenses and light sources as well as a sample feeding system. The particles are captured by the cameras as “shadow projections” while moving between light source and camera. An essential prerequisite is a finely tuned optical system with strong light sources and short exposure times, and highperformance software – the cameras of the CAMSIZER analysers take more than 270 images per second which are evaluated in real time. The average measurement time is 2 to 5 minutes, which corresponds to several million single particles.
Read more about the particle characterisation with Dynamic Image Analysis and other stories in “the sample” vol.42, available for free download below.
