Classizer™ One

◊Coming Soon – Classizer™ ONE Auto Sampler! 

The EOS Classizer™ ONE is a multi-parametric particle analysis platform based on patented Single Particle Extinction and Scattering (SPES) technology.

Individual particles are characterised in a continuous liquid flow to obtain detailed information such as optical classification (effective refractive index), particle size distribution and particle concentration – even in samples containing complex heterogeneous particle mixtures.

Key Features:

Number concentration of each particle type characterised independently
Fully overlapping particle size distributions for different materials – allows thorough interrogation of complex samples and mixtures
Multi-parametric technique – measurement of particle size distribution, concentration and probing of optical information such as porosity, wetting, agglomeration, aspect ratio and loading – all in one, compact benchtop instrument
Integration with other analytical devices – cFFF separators, small chemical reactors, and pilot lines
High particle size resolution across a wide range (0.1 microns to 20 microns)

As exclusive distributor for the UK and Ireland, Analytik is proud to supply the Classizer™ ONE from EOS. Through Analytik, you’ll have access to our team of experts to help develop your application and get the most out of your investment.

For more information, or to discuss your requirements with a product specialist, please call us on +44 (0)1954 232 776 or email


The Single Particle Extinction and Scattering (SPES) method utilises a syringe pump to create a laminar fluid flow of the sample through a laser beam. The laser beam is tightly focussed so that the particles in the sample flow through the narrow waist of the beam between the laser source and a sensor.

IMAGE RIGHT: System overview showing how the sample is fed through the flow cell and sampled by the focussed laser beam. Automated flow using the system pump sends a defined amount of the stirred sample. Single particles pass through the laser beam and produce changing intensity modulations/interference patterns at the sensor plane.

Click image to enlarge

Click image to enlarge

The interference between the un-scattered laser light and the fraction scattered by each particle, at different positions in the beam, allows accurate characterisation of the sample. Light is scattered in different ways by the particles, according to their size, refractive index and structure. The EOS Classizer™ ONE is able to use this information to create 2-dimensional histogram clouds, separating the particles according to their optical properties. Heterogeneous samples produce simultaneously different “clouds” for each particle population which can be individually selected, analysed and compared.

Particle size distribution, numerical concentration and other statistical insights are retrieved from this information and are displayed by individual sample component in heterogenous mixes, for the whole sample, or for each time frame in a Continuous Flow Analysis mode. This includes fully overlapping particle size distributions for each component material.

IMAGE RIGHT: Particle size distribution and number concentration are calculated for different materials in a heterogeneous solution, even for overlapping particle size distributions (PSDs).

Click image to enlarge

Interested in the Classizer™ One? Request a quote or call us on +44(0)1954 232 776 to discuss your requirements.


Application Areas:

  • Gold & Silver Nanoparticles
  • Liposomes & Emulsions
  • Encapsulations
  • Drug delivery
  • Pigments & Inks
  • Environmental studies
  • Abrasives & Slurries
  • Fine chemicals


PDF Icon Classizer ONE Full Brochure

PDF Icon Classizer ONE Info Sheet

PDF Icon Classizer ONE Application Note 


Article & Papers

PDF Icon Light extinction and scattering from aggregates composed of submicron particles

PDF Icon On the quasi-universality of the forward light scattering lobe for micrometric objects

PDF Icon Multiparametric optical characterization of airborne dust with single particle extinction and scattering

PDF Icon Particle shape accounts for instrumental discrepancy in ice core dust size distributions

PDF Icon In vitro assessment of silver nanoparticles immunotoxicity

PDF Icon Single Particle Extinction and Scattering allows novel optical characterization of aerosols

Application Notes

PDF Icon Continuous SPES flow analysis (cfa-spes)

PDF Icon Addressing the issue of wetting and clustering by means of spes technology: water suspensions of powders

PDF Icon Batch to batch consistency via multiparametric spes principal component analysis (spes-pca)

PDF Icon Multiparametric classification of particles as a pathway to oversize analysis in complex fluids via spes technology

PDF Icon Quantitative classification of particles in biological liquids via spes technology

PDF Icon Monitoring the fate of a lipid/zno emulsion in environmental waters

PDF Icon Analysis of abrasives via spes technology

PDF Icon Classification of oil and oil mixes emulsions via spes technology

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