International Processing Trade Fair for Powder, Bulk Solids, Fluids and Liquids

26 - 28 September 2023 // Nuremberg, Germany

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Exhibitors & Products POWTECH 2023
Zoom Image LOGO_Bettersizer S3 series - Particle size and shape analysis 0.01 – 3,500 µm

Bettersizer S3 series - Particle size and shape analysis 0.01 – 3,500 µm

LOGO_Bettersizer S3 series - Particle size and shape analysis 0.01 – 3,500 µm

Bettersizer S3 series - Particle size and shape analysis 0.01 – 3,500 µm

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Bettersizer S3 series - Particle size and shape analysis 0.01 – 3,500 µm

Bettersizer S3 series
Particle size and shape analysis 0.01 – 3,500 µm

With its unique and innovative design, the Bettersizer Series (consisting of the Bettersizer S3 and the S3 Plus) combines the measurement methods of static light scattering and dynamic image analysis, thus offering a universal option for characterizing the size and shape of particles from the nanometer to the millimeter range.

Using the patented DLOIOS technology, even nanoparticles (from 10 nm onward) can reliably be characterized. The additional lens between the laser and the measurement chamber enables the detection of the backscattered light. The use of only one laser with the oblique incidence of light provides a continuous scattering spectrum with consistent wavelength and allows the detection in a continuous angle range up to 165°.

Since the maximal intensity of the scattered light of large particles can only be detected at very small angles, the classical static light scattering cannot analyze those particles sufficiently enough. The image analysis system of the Bettersizer S3 Plus enables, in contrast to other laser diffraction systems, the reliable detection of larger particles thanks to particle detection by the camera and thus allows realistic measurements up to 3.5 mm.

Thanks to the implemented dynamic image analysis, the most important shape parameters can be calculated from the individual particle images – aspect ratio, circularity, sharpness of edges, and others.


  • particle measurement range: 0.01 – 3,500 µm*
  • integrated CCD camera (0.5X) for the (optionally) significantly more precise detection of coarse particles up to 5 mm, especially of oversized particles, compared to “plain” static light scattering.
  • only Bettersizer S3 Plus: a second integrated CCD camera (10X) for the additional analysis of particle shape from a size of around 4 µm
  • innovative double lens technology (DLOIOS) with an extremely wide detection angle range (0.02° – 165°) and detection in the backscattering direction for reliable measurement of even very small particles (> 10 nm)
  • single laser technology and thus consistent laser wavelength (532 nm) for all evaluations
  • short measurement time of less than one minute
  • determination of the refractive index
  • Standard operation procedures (SOP)
  • automated dispersion and circulation system
  • automatic centering function of the optics before each measurement
  • accurate calibration function
  • easy operation and intuitive software interface
  • export of the results in multiple formats such as .pdf, .txt, .jpg with software flexibility for the creation of result reports and archiving of the measurement data.
  • 600 ml standard bath volume
  • compliant with ISO 13320 and 21 CFR-Part 11

* The measuring range depends on the sample.

Literature and Norms

/1/ ISO 13320 Particle size analysis – Laser diffraction methods

/2/ ISO 13322-2: Particle size analysis – Image analysis methods – Part 2: Dynamic image analysis methods

/3/ ISO 9276-6 Representation of results of particle size analysis – Part 6: Descriptive and quantitative representation of particle shape and morphology

/4/ CIT (Chemie Ingenieur Technik) 6/2020; „Untersuchung der partikulären Eigenschaften von Sanden hinsichtlich der Eignung zur Betonproduktion“ [available only in German]

/5/ Particle World 21; p. 5 – 8; „Investigation of different sands with the Bettersizer S3 Plus regarding their suitability for concrete production”


  • Autosampler
  • Solvent-resistant small volume dispersing unit
  • Additional external ultrasound
  • Automatic Recycling Unit A.R.U.

Other instruments

POWTECH offers concrete solutions for packaging-intensive industries. Industry guide


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