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Bettersize - Laser Particle Size Analyzer (Dry & Wet Dispersions) - Bettersizer 2600

The integrated and robust laser particle size analyzer, Bettersizer 2600, can deliver reliable particle size measurement results from submicron to millimeter. Driven by the innovative optical system and Standard Operation Procedure (SOP), the Bettersizer 2600 wet and dry particle size analyzer strikes a harmonious balance between high-functionality, easy operation, low maintenance, and cost-effectiveness.

Technical specifications

Measuring principle Laser diffraction, Fourier and Reverse Fourier optical system
Analysis theory Mie or Fraunhofer
Applications suspensions, emulsions, dry powders
Measuring range Wet: 0.02 - 2600 µm; Dry: 0.1 - 2600 µm
Number of size classes >100
Typical measurement time <10 seconds
Accuracy error / Repeatability error Wet: <0.5% / <0.5%; Dry: <1.0% / <1.0% (GBRM D50)
Circulation / Dispersion / Volume Wet: Centrifugal pump / Ultrasound (50 W) / 600 ml
Dry: Venturi system, 0 - 5 bar Dry: Venturi system, 0 - 5 bar
Laser: number / type / wavelength / power / class 1 / Fiber laser / 635 nm (red) / 3 mW / Class 1
Effective focal length 223 mm
Detector system Log-space arrangement
Detector channels / Angle range 92 (forward, lateral, and backward) / 0.016° - 165°
Conformity 21 CFR Part 11, ISO 13320, USP<429>, CE
Data export Excel, PDF, Word, JPG, etc.
Dimensions / Weight 705 x 318 x 295 mm (L x W x H) / 23 kg
Recommended operating system Windows 7 or higher, Intel Core i5, 4 GB RAM, USB 2.0
Volume / Weight 820x610x290mm / 47KG

Key features

  • Measurement: Particle size
  • Particle size range:
    Wet dispersion: 0.02 to 2600μm
    Dry dispersion: 0.1 to 2600μm
  • Dispersion type: Wet and Dry
  • Technology: Laser diffraction
  • Precise measurement of both large and small particles covering the broadest range by a new patented technology utilizing both Fourier and Reverse Fourier optical systems 
  • Optical bench with 92 detectors covering an angular range of 0.016° - 165° 
  • Optional wet and/or dry dispersion 
  • Small volume dry dispersing module for small sample quantities especially for pharmaceutical or valuable samples in short supply 
  • Easy and fast to changeover between dispersing modules
  • Easy to implement, create and use Standard Operation Procedures for new materials 
  • Automatic alignment of the optical system 
  • User-friendly software, easily learnt

1. Fourier and Reverse Fourier optical system 
Bettersizer 2600 particle size tester is characterized in particular by its unique and innovative optical bench design: the light focused on the detectors through the lens is scattered by particles and detected in both forward and lateral directions (Inverse Fourier structure). In contrast to conventional laser diffraction devices, the backscattered light passes through the lens a second time. In addition, the cuvette is positioned at an angle of 35° to the incoming laser light. 

This smart setup allows, on the one hand, the detection of scattered light in a very wide angular range from 0.016° to 165°. On the other hand, in contrast to a pure Inverse Fourier structure, the particles do not have to lie in one plane – the simultaneous exact measurement of small and large particles is therefore achieved.

2. Intuitive and powerful software

  • Simple operation and a clear intuitive interface 
  • Real-time mode for determining the optimal measurement conditions 
  • Simple to use SOP operation 
  • Fully automated measurement routine with automatic calibration 
  • Automatic data backup and editable reports 
  • Accurate analysis achieved by appropriate use of either the Fraunhofer or Mie evaluation models dependent on sample size and sample type 
  • Automatic cleaning routine 
  • Conversion from wet to dry dispersion at the touch of a button 

3. Wet Dispersion
Laser diffraction method conforming to ISO 13320 
In a wet measurement, the particles are dispersed in a liquid medium in the dispersing module, additional dispersion may be performed by an ultrasonic disperser. 

Various external modules are also available to achieve this purpose:

  • BT-802 – is a fully automatic standard dispersing module with integrated ultrasound and centrifugal pump for sample circulation with a volume of 600 ml. It is suitable for large sample sizes for materials that can be dispersed in water or alcohol. 
  • BT-800N – is a dispersing module with medium volume (approx. 250ml) with ultrasound and centrifugal pump; suitable for non-polar solvents such as heptane, toluene and oil.

4. Dry Dispersion 
Dry dispersion is used when dry powders or granules are to be measured without the use of solvent. During sample preparation, the sample is pre-dispersed by a vibrating transmission channel, it falls into a channel and is transported by compressed air (venturi nozzle) through to the horizontal measuring cell. Dispersion is carried out by particle collisions with the wall of the container and particleparticle shear. Switching dispersion modules is easy. Simply remove one module and replace it using its handle. Dry dispersion is also possible with a variety of external modules: 

  • BT-902 – this is an automatic standard dry dispersing module with a particle conveying channel with adjustable conveying rate; adjustable dispersion pressure (up to max. 5 bar) enable it to be suitable for all powders and granules whether they be cohesive or free flowing. 
  • BT-903 – is an automatic dry dispersing module for small sample sizes of powders; ideal for powders in research or pharmaceutical applications. 20 mg to 1 g sample sizes.

5. Applications of Bettersizer 2600 particle size analyser

Sample Dispersion Modules

Bettersizer 2600 Dry and Wet Laser Particle Size Analyzer


Bettersize has become a significant player in the particle sizing business since 1995. We are a team of ~160 employees dedicated to share our expertise to satisfy your instrument and application requirements with reliable products and first-class services.


As the leading particle size analyzer manufacturer in China in terms of brand reputation, sales volume and most important quality, Bettersize spare no efforts on R&D each year. We offer a variety of products from basic to advanced research equipment, deliver precise analysis of materials from nanometer to millimeter, and assist scientists and engineers to understand material properties, facilitate research, and improve production efficiency.


Focused on technology innovation, product manufacturing, application research, and after sale service, Bettersize is making the particle size analyzer of China enter into the international advanced ranks.