Laser Particle Size Analysis

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.

Fritsch have patented the design of a movable measurement cell between the Fourier lens and the optical light scattering detectors contained within the new A22 NeXT. This means that a wide particle size distribution can be measured and adopted for many different types of sample materials.

There are two instruments:

1. A22 NeXT Micro with a measurement range of 0.5-1,500µm.
The NeXT Micro laser particle size analyser contains a single light source and a single forward light scattering detector, with a measurement range of 0.5-1,500µm.

2. A22 NeXT Nano with a measurement range of 0.01-3,800µm.
The NeXT Nano laser particle size analyser also has only a single light source, however additional light scattering detectors have been added to the instrument to detect forward, backward and sideward light scattering to increase the particle size measurement range from 0.01-3,800µm.

Key features of the A22 NeXT laser particle size analysers include the following:

  • Measuring range of 0.5-1,500µm or 0.01-3,800µm
  • Single laser technology.
  • Optionally ultrasonics
  • Ease of operation, using pre-defined SOPs.
  • Flexible report format generator, which can be pre-defined and customised to individual requirements.
  • Automatic clean / fill of the recirculation line after each measurement.
  • Easily accessible measurement cell, which can be opened without tools.
  • Continuous logging of the laser output values.
  • Small footprint.

The A22 NeXT laser particle size analyser has a superior wet dispersion unit with the following features:

  • Variable dispersion volume – 150 to 500mls.
  • Illuminated dispersion bath.
  • Powerful, programmable recirculation pump.
  • Enhanced recirculation line to the measurement cell without any: dead spaces, valves and movable seals.
  • The recirculation system has been made using 316L stainless steel, PTFE, BK7 glass with Viton or silicone seals available, which can be used with a range of organic solvents.
  • The return line to the wet dispersion unit is constantly changing position, to ensure turbulence and good mixing in the wet dispersion unit, whilst measurements are being made.

These instruments are supplied as standard with a CPU unit (monitor, keyboard and mouse) with the MaS Control software pre-installed.

Key Features of the A22 NeXT MaS Control Software:

  • Control of the measurement and dispersion using pre-defined SOPs.
  • Selectable user values and size classes, which are pre-selected in the SOPs.
  • Graphical representation as density distribution and cumulative sum curve.
  • Graphical representation and comparison of multiple measurements.
  • The use of either the Fraunhofer or Mie theory.
  • Input of theoretical results.
  • Flexible report generator, which can be personalised and customised.
  • File manager with integrated SQL database.
  • Trend analysis and data export to Excel™
  • 21 CFR part 11 available as an option.

Preview Video

Demonstration Video