Particle Analyzer

The particle analyzer LA-960 operates on the basis of static laser light scattering (acc. ISO 13320) and was developed as a solution to customer requirements for a high-performance, flexible, and easy to use instrument for a wide variety of applications - from particle charactarization of powders and granules to the measuring of suspensions and emulsions. It can be ordered in different configurations for

  • Dry measurement
  • Wet measurement
  • Combination of dry and wet measurement

The complete processing time from one sample to the next is only 1 minute, this is only a quarter of the usual time up to now. An integrated system and software automation guarantees simple operation and excellent reproducibility of the measuring results. The measuring cells are located on a movable slide which makes changing the dispersion unit a matter of seconds.

Single-range samples can be measured over the complete range (0.01 to 5000 μm) without the need to combine different measurements and/or change lenses.

The particle analyzer LA-960 features a powerful circulation system for wet measurements. Thanks to the increased sensitivity small particles with a diameter up to 10 nm are reliably detected. In combination with the evaluation software the system sets new standards regarding precision, speed and resolution.
For dry measurements the effective dispersion unit PowderJet can be used. Thanks to the combination of dry measurement cell with integrated dispersion nozzle and suction mechanism, a great variety of powders can be dispersed and measured quickly and reliably.

Application Examples

catalysts, ceramics, chemical-mechanical polishing, cosmetics, foodstuffs, metal powders, nano-coatings, pigments, research & development for nano-particles, ...

Product Advantages

  • Compact design
  • Dry and wet measurement possible
  • Very wide single measuring range from 10 nm to 5 mm
  • Analysis according Mie Scattering Theory
  • Sample throughput time of only one minute
  • Extremely high resolution in the sub-micron range
  • Exchange of measuring cell within seconds
  • Effective ultrasound and stirring dispersion
  • 21 CFR Part 11 compliant software


Measuring principle Mie Scattering Theory according ISO 13320
Measuring range 0.01 µm - 5000 µm
Type of analysis dry and wet analysis
Measuring time ~ 5 seconds (from start of measurement to display of data) ~ 1 minute (from dispersion liquid filling to measurement and rinse)
Measuring methods manual flow cell measurement
manual fraction cell measurement (fraction cell and cell holder optional)
dry measurement (PowderJet dry feeder optional)
Required sample amount* 10 mg - 5 g (for flow cell measurement; depending on feed material)
Filling quantity flow cell: 180 - 290 ml, in 4 steps adjustable
fraction cell: ~ 15 ml or ~ 10ml
LitreFlow: ~ 1000ml
Miniflow: ~ 35 - 55ml
Dispersion liquid water, alcohol and other organic solvents
Optical system inverse fourier-optics
- Light Source 655 nm laser diode, 5 mW
405 nm LED, 3 mW
- Detector 64-division ring shaped detector (forward direction)
23 separate wide-angle detectors (side and reverse direction)
Sample circulation system
- Ultrasonic chamber probe: 130 W, 28 kHz
- Discharge volume 10 l/min, 15-step speed selection
- Automatic filling pump 10 l/min (included)
- Sample flow cell tempax glass
Operating environment 15 °C - 30 °C, less than 85% rel. Humidity
Power supply 100/120/230 V, 50/60 Hz, 300 VA
Dimensions (W x H x D) ~ 705 x 500 x 530 mm
Weight (Measuring unit) ~ 56 kg (without Dry Powder Jet)
Interface USB 2.0 (between PC and Analyzer)
Operating unit operating and evaluation software in German, English, French for IBM compatible PC with Windows 7 / 10
operation via mouse and keyboard
Options and Accessories
- Dry dispersion unit yes
- Fraction cell tempax glass, 5 ml
- Micro-quantity dispersion unit resistent to organic solvents, 50 ml
- Circulation system resistent to organic solvents, 180 - 290 ml
- Autosampler for 24 samples

Please note:
*depending on feed material and instrument configuration/settings

Function Principle

The good results for measurements in the sub-micron range are mainly based on the fact that with very fine particles the strong, blue LED light source ensures a clear signal with large scattering angles. These signals are recorded by the innovative 4-channel detectors with increased sensitivity and an extremely high reading frequency of 5,000 values per second. This makes it possible to measure many new materials in the nanometre range which up to now required other methods such as photon correlation spectroscopy (PCS). This is a clear advantage for the user because the analytical performance in combination with a wide measuring range can, in certain circumstances, save the expenditure for a further particle analyser.

The optical layout of LA-960 uses a light path that is about 4 times the length of that of conventional devices. By extending the light path, the signal/noise ratio was considerably improved.

Thanks to the reverse Fourier optics and the light path folded by mirrors, a very compact design size was realized. A newly developed segmented multi-element detector with special arrangement and increased sensitivity of the individual detectors allows the light diffracted at a small angle by large particles to be accurately recorded.

The effectiveness of these new developments is exemplified by the very high resolution of LA-960. For example, it is possible when measuring a multi-modal distribution to resolve five separate modes. Three of these modes can be within a single decade.

Subject to technical modifications and errors

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