Laser Diffraction

The proven HELOS series – with its classical parallel beam laser diffraction set-up – offers a powerful technology for particle size distribution analysis of powders, granules, suspensions, emulsions, sprays and numerous other particulate systems. A size range from below 0.1 µm to 8,750 µm is mastered. The modular sensor reveals its true superiority when operated with feeding and dispersing systems, that guarantee for best adaption to the product sample.

The complete spectrum of ranges R1 to R8 proves the strong concept of the measuring range segmentation. Reliable insight into all details of the samples to be analysed can only be achieved with selection of the optimum measuring range. Typical disperse products rarely span over more than two decades. Even for these special products the concept of the multi range combination holds since the introduction of the innovative R-series.

Best possible agreement with absolute values is achieved using the more powerful evaluation algorithms of FREE and MIEE. Extremely short analysis times – especially for dry dispersion – are maintained and even for the combination of four measuring ranges the time requirement typically necessary for suspension analysis is kept. The R-series of our particle size analyser HELOS sets new benchmarks for precision and accuracy. Latest improvements comprise enhanced application of parameter-free Fraunhofer evaluation down to the submicron regime (below 1 µm). Laser diffraction is now even closer to absolute standards. Continually, industrial requirements and limits are considerably outmatched. The use of more stable inversion procedures in combination with best optical models and the inclusion of signal statistics brings the laser diffraction even closer to absolute standards. Continually, to the specifications of ISO 13320 "Particle size analysis - laser diffraction methods" the requirements and limits are considerably outmatched.