Laser particle sizer
Laser particle sizer. In the field of particle-size measurement, laser diffraction techniques offer advantages over other methods by providing fast analysis times, good reproducibility, ease of operation and calibration, as well as large measurable particle size ranges in one single measurement. These advantages coupled with flexibility, low maintenance, user friendliness and competitive pricing have ensured the technique’s success. The Analysette 22 laser particle sizer series covers a wide range of applications to suit users’ specific requirements. Four models are available. The Compact system, a particularly easy-to-use bench model instrument, provides a solution for sample materials in the particle size range from 0.3 to 300 µm. The MicroTec model expands the measurement range from 0.1 to 600 µm or even as far as 0.1 to 2000 µm with the MicroTec XT version In addition to the expanded measurement range, both models also provide users with information about the shape of the analysed particles. This is based on the fact that non-spherical particles tend to scatter light in specific spatial directions. A specially developed sensor measures the shape-sensitive portions of the diffraction image and, based on this, the analysis software can determine the elongation ratio for the d50 value of the previously recorded size distribution. One single measurement can thus determine both the particle size distribution and the ratio of spherical to elongated particles. The option of shape analysis is also available with the NanoTec model. At 2000 µm, this system offers the same high measurement limit as the MicroTec XT, but also extends the lower limit down to 0.01 µm. This meaningful entry into the nano range is made possible by a second laser beam that passes the sample through a micro-sized hole in the centre of the detector; this light is scattered backwards by particles in the nanometre range. Thus the entire detector surface is used, even in the nano range, and the resolution and sensitivity are not unnecessarily reduced by a smaller number of sensor elements. All particle sizers in the Analysette 22 range are available with dry and/or liquid dispersion units. For measurements with solvents, a special dispersion unit is available (for MicroTec/NanoTec) that can either be fully integrated into the system or used as a separate free-standing module. LaPaSS, the laser particle sizer software is based on a relational database that stores all inputs, parameters and results for later inspection. An intuitive user interface allows control of the instrument via freely programmable standard operating procedures (SOPs).
Laser particle sizer
Fritsch GmbH
