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Substance characterisation

Technological solutions built on four decades of intensive research

Using Topas preparation technologies and analytical instruments for disperse material systems (suspensions, powders, emulsions), a wide variety of physico-chemical properties can be determined for substance characterisation. These include, among others, the deagglomeration behaviour, the particle size distribution, the particle concentrations or the coarse fraction. These characteristics are used, among other things, in development, quality control or safety data sheets in accordance with the REACH Regulation (Registration, Evaluation, Authorisation and Restriction of Chemicals). Sample fractionation of an analytically more precise evaluation is a further field of application. Contact us – together we will find your solution.


The Topas laboratory on your desk: modular and smart preparation and analysis technologies

Preparation technologies from our company include ultrasonic disintegrators, vibrating screen exciters for microsieving, dry dispersion or bulk solids analysis. We also show diversity in our spectrum of analytical instruments such as liquid particle counters, aerosol spectrometers or pore size measurement systems.


For more than 30 years, customers from a wide range of sectors have learned to rely on our strengths:

  • industry (quality controls for incoming and outgoing wares)
    • chemical, biological, medical
    • semiconductor industry
    • automotive industry
    • food industry
    • cosmetics industry
  • research
    • analysis laboratories
    • scientific institutes
    • industrial investigations
  • government agencies
    • environment
    • occupational safety
    • consumer protection


In determine the characteristics of powders and suspensions in the best possible way, a defined and reproducible dispersion is required. The state of dispersion, i.e., particle concentration and particle size distribution, can be analysed by existing measurement technologies but also with our analytical instruments.

We provide you with competent technologies for analytical preparation:

Dispersion technologies

Analysis of particle size distributions and size fractions


40 years of experience in granulometry

As a spin-off from the Technische Universität Dresden, the founders of Topas were already involved in the field of particle size analysis (granulometry) in the beginning of the 1980s. Our FAS 362 liquid particle counter, which is still in use today, is thus one of our first proprietary technologies and impressively demonstrates almost 40 years of experience.

Our technical solution

LAP 323

LAP 323 Aerosol Spectrometer for analysis of particle size distributions and particle number concentrations in aerosols, Dual Wave Length Technology

Aerosol particle size spectrometer LAP 323 frontside
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RFU 564

Regulated Flow Unit RFU 564 for providing variable adjustable and controlled air flow rates up to 100 L/min for underpressure and overpressure operation mode

Regulated Flow Unit RFU 564, front view
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ATM 222

Atomizer Aerosol Generator ATM 222 for aerosol generation from liquids, compressed air operated, pneumitic-controlled, remote controllable

Atomizer Aerosol Generator ATM 222 frontside
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DDU 570/H

Diffusion Dryer Unit DDU 570/H for drying of water-containing aerosols by silica gel, high model

Diffusion Dryer Unit DDU 570/H
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DIL 557

DIL 550 Dilution System for static dilution (customised) of aerosols at static air flow rate (customised)

Dilution System for Aerosols DIL 557, frontal view
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EMS 755

Electromagnetic Sieve Vibrator EMS 755 for finest grain sieving of dry powders (dry sieving) or suspensions (wet sieving)

Electro Magnetic Sieve Vibrator EMS 755, frontal view
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SAG 410

Solid Aerosol Generator SAG 410 for aerosol generation from powders, toothed belt dosing, moderate mass flow rates

Solid Aerosol Generator SAG 410 side view
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UDS 751

Ultrasonic Desintegrator UDS 751 for dispersing solutions, emulsions and suspensions by focused ultrasonic

UDS 751 Ultrasonic Processor, front view
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