Laser Particle Size Analysis

Fritsch Analysette 22 NanoTec Laser Particle Size Analyser

Since 1984, Fritsch have been manufacturing laser particle size analysers. Fritsch was the first company to introduce the concept of laser diffraction in a convergent laser beam. By positioning the Fourier lens in front of the measurement cell, a convergent laser beam passes thought the measurement cell and the scattered light is focused directly on the detector without the need for additional optical elements. For the large scattering angles of small particles, a side detector system has been fully integrated.

The key to accurate and reproducible laser particle size analysis measurements is the dispersion of the sample material, prior to measurement. For most applications, wet dispersion (in water) is used. However, dispersion in solvents and air is also possible and Fritsch offer a range of modular dispersion units, which can be easily connected to the NanoTec laser particle size analyser:

1. Wet dispersion unit - with a liquid (typically water) volume of 300-500ml.
2. Small volume dispersion unit – with a liquid (usually a solvent) volume of 50ml.
3. Dry dispersion unit, which disperses agglomerates using compressed air.
4. Falling chute dispersion unit, which feeds the sample material directly into the measurement cell.

These four modular dispersion units are programmed and controlled by the Fritsch MaS control software. In addition, a twenty-six-place auto-sampler (with 40ml containers) can also be added to the wet dispersion unit. Two dispersion units, can be connected to the NanoTec laser particle size analyser and used independently of each other.

Key features of the NanoTec laser particle size analyser include the following:

  • Measuring range of 0.01µm to 2,100µm.
  • Ease of operation, using pre-defined SOPs.
  • Flexible report format generator, which can be pre-defined and customised to individual requirements.
  • Exceptionally high precision measurement, with a resolution of up to 110 measuring channels.
  • Dual laser technology.
  • Interchangeable wet and dry dispersion modules.
  • Small footprint.