Bettersizer S3 Plus

Complete particle size and shape analysis on one unit

Seamlessly combined laser diffraction and automated imaging in one model, Bettersizer S3 Plus not only achieves a wide size range from 0.01 to 3500μm, but also analyzes all size and shape parameters of a great variety of bulk materials. The reliable performance and user- friendly operation mode make Bettersizer S3 Plus the best choice for research in need of material characterization.

  • Measurement: Particle size and particle shape
  • Particle size from 0.01µm to 3500µm
  • Particle shape from 2µm to 3500µm
  • Dispersion type: Wet
  • Technology: Laser diffraction + Automated imaging
  • Automatic refractive index measurement
ModelBettersizer S3 PlusBettersizer S3
Particle size measuring range0.01 μm-3500 μm0.01 μm-3500 μm
Particle shape measuring range2 μm-3500 μm100 μm-3500 μm
Measuring method- Laser diffraction: DLOIS
- Automated Imageing: 0.5x lens and 10x lens
- Laser diffraction: DLOIS
- Automated Imageing: 0.5x lens
Dispersion systemWetWet
Automatic refractive index measurementYesYes


Features and Benefits

Measuring range:
Particle size from 0.01μm to 3500μm.
Particle shape from 2μm to 3500μm.

Dual Lenses & Oblique Incidence Optical System (DLOIS): eliminates the fitting error of double beam system, enlarges detection angle (0.02 to 165 degree) and assures high sensitivity, resolution and accuracy.

Particle size & shape: two CCD cameras with 120 fps, 1.3 Mpixel, and lenses 0.5x and 10x. It can combine particle size and shape (0.5x), separate 0.5x or 10x image, 0.5x and 10x joint image to measure particle shape.

Refractive index measurement: pre-determine the refractive index of materials; improve the accuracy of measurements of materials with unknown refractive index data.

Ease of use: with Standard Operation Procedure (SOP), automatic alignment, automatic circulation & dispersion system, and the powerful software, sample analysis on Bettersizer S3 Plus can be a one-button operation.

Intelligent Particle Sizing Performance

Bettersizer S3 Plus defines a new era in particle sizing and shape measurement and a culmination of our years of experience excel in particle sizing and shape analysis instrumentation.

The accuracy of Bettersizer S3 Plus as verified by measurements of eight standard samples.

Bettersize 3000_pic4

Bettersizer S3 Plus measures samples with a wide distribution range. Six repeat measurement results under same analysis conditions yield good repeatability as shown in the following graph. Average repeatability deviation of D50 is 0.31%.


Detection limit test : A mixture reference standard samples of 3.1 µm and 5.1 µm nominal diameter was used to gauge the resolution of the Bettersizer S3 Plus against the industry benchmark particle sizing instrument. The mixing ratio of 1.65 was used for the test. Bettersizer S3 Plus clearly out-resolve the benchmark instrument as shown in the following graphs.


Test methodology: Measurement with a mix reference standard sample of 0.3mm, 0.85mm, and 3.5mm was performed against a benchmark instrument. Bettersizer S3 Plus resolves three peaks in the measurement result, while the benchmark instrument only able to resolve two peaks.



Particle size distributionSuspension, emulsion, dry powder
TheoryLaser diffraction +automated imaging
Anslysis thoeryMie and Fraunhofer
Testing speed3kHz
Typical measurement time≤10 second
Size range0.01 - 3500μm (particle size)
4-3500μm (particle shape)
Number of size classesMore than 100 customized grades
Particle shapeCircularity,L/D,kinds of equivalent particle size
Refractive IndexRefractive Index measurement
Accuracy≤0.5% (GBRM D50)
Repeatability≤0.5% (GBRM D50)
Resolution ratioSingle peak, double peak, multi-peak
Green light sourceMax. 5mW, DPSSL pumping, 532nm
White light sourceParallel homogenized light source, Image light
Lens arrangementDual lenses on the right and left of sample cell, oblique incidence
Lens designF-Theta Lenses, 0.5X telecentric lens
Effective focal length223mm, image focal length 110mm
ArrangementLog-spaced array
Quantity96 pieces (forward, sideway, backward)
Angular detection range0.02 - 165 degree
Light path adjustmentIntelligent automatic alignment
Wet dispersion systemStandard configuration
Dispersion systemUltrasound 50W, 38 KHz dry run protection system
Water circulationCentrifugal pump, 500 -2500 ml/min, auto water intake and rinsing
Water capacity600 ml
21 CFR Part 11Enable
SOP DesignerEnable
ReportMore than 14 formats
Auto testEnable
Data exportEXCEL, PDF, WORD, JPG and etc.
Laser classClass I laser product
Supply voltage220VAC, 180W
Dimension820mm x 610mm x 290mm (L x W x H)
Computer interfaceAt least a USB2.0 port required
Operation systemWindows XP, Windows 7,8 or 10
Hardware specification500GB HD,
CPU: I7 2600 or above;
Memory: 4G or above;
Mainboard: With PCI-E interface, long and short card slot.
Monitor resolution: 1680*1050 or above