Bettersizer ST

Practical and economical laser particle size analyzer (compact model)

Bettersizer ST Laser Diffraction Particle Size Distribution Analyzer is the ideal combination of performance, price, and packaging. Based on the advanced optical design of Bettersizer series analyzers, the ST provides stable and reliable testing results with minimum user intervention. The compact size (660 mm x 420 mm) of ST saves valuable workspace.

● Measurement: Particle size
● Particle size range: 0.1µm to 1000µm
● Dispersion type: Wet
● Technology: Laser diffraction


Features and Benefits

Measuring range:
Particle size from 0.1μm to 1000μm.

Dual Lenses Optical System (DLOS): optical design provides accurate results for particle size analysis.

Standard Operation Procedure (SOP): offers a one-button operation.

Compact design: saves work space.

• Automatic alignment and automatic testing lead to good repeatability with relative standard deviation (%RSD) of less than 1%.


Testing parameterMaterial
Particle size distributionSuspension, emulsion, dry powder
GeneralBettersizer ST
TheoryLaser diffraction
Analysis theoryMie and Fraunhofer
Testing speed3kHz
Typical measurement time≤10second
Size range0.1 - 1000µm
Number of size classesMore than 100 customized grades
Accuracy≤1% (GBRM D50)
Repeatability≤1% (GBRM D50)
Resolution ratioSingle peak, double peak, multi-peak
Red lightMax. 3mW, Semiconductor optical fiber laser, 635nm
Lens arrangementDual lenses on the right and left of sample cell
Lens designF-Theta Lenses
Effective focal length223mm
ArrangementLog-spaced array
Quantity86 pieces (forward, lateral, backward)
Light path adjustmentIntelligent automatic alignment
Sample dispersion system
Dispersion typeWet
Dispersion systemUltrasound 50W, 38 KHz dry-run protection system
Water circulationCentrifugal pump, 3000 -8000ml/min, auto water intake and rinsing
Water capacity600ml
21 CFR Part 11Enable
SOP DesignerEnable
ReportMore than 14 formats report
Auto testEnable
Data exportEXCEL, PDF,WORD, JPG and etc.
System compliance
Laser classClass I laser product
Supply voltage220VAC
Dimension660mm x420mm x 320mm (L x W x H)
Computer specification
Computer interfaceAt least a USB2.0 port required
Operation systemWindows XP, Windows 7,8 or 10
Hardware specificationIntel Core I5, 4GB RAM, 250GB HD