Introduction of Bettersizer ST
Bettersizer ST is an intelligent dual lenses particle size analyzer with integrated design, and all of the operations can be completed automatically under the control of the computer. It has particular functions included auto test, auto alignment, auto water supply, auto drainage, auto bubble removing, auto cleaning and other automated routines. The use of high performance semiconductor laser provides a life time over 25000 hours. The use of anti-dry ultrasonic dispersing technology ensures when opening ultrasonic, the instrument will not be damaged when circulating tank without water. The instrument has outstanding accuracy and good reliability, good repeatability, easy operating, fast test speed, etc. It is a new generation of particle size analyzer that integrates the technologies of laser, computer and photoelectron, and especially suits the laboratories of enterprises, universities and research institutes to use.
Repeatability
Excellent repeatability is achieved thanks to:
- Laser, detector and signal transmission system are stable and reliable.
- Consistent and effective dispersing system.
- Automatic alignment keeps the instrument always in optimum condition.
- Sampling rate up to 3500 times/second ensures outstanding repeatability
Repeatability verification:
a) Repeatability of a serial test for same samples
About Repeatability
Repeatability is primary index of particle size analyzer. It is worthless for particle size analyzer if repeatability is not good. Repeatability is related to the instrument, also, related to the operator, voltage, water quality and interference. It is a reflection of integrated factors.
b) Repeatability of re-sampling test
Accuracy
Excellent accuracy is achieved thanks to:
- The use of a dual lenses optical system (DLOS) invented by Bettersize, it improves the precision of the analysis compared to single lenses systems.
- The use of 86 detectors plus high performance software, provides excellent resolution regardless the sample has a single modal or multimodal distribution.
- Complete sample preparation system including circulation, ultrasonic dispersing, stirring, auto water supply and auto cleaning.
- Use of size standard to verify the accuracy of the results.
Verifications of accuracy:
a) Accuracy which approved by China National Accreditation: Satisfactory.
b) Compare with test results of other brand
| CaCo3 | D10 | D50 | D90 | Fluorescent Powder | D10 | D50 | D90 |
| Other brand | 0.752 | 2.117 | 5.576 | Other brand | 11.108 | 24.017 | 44.638 |
| Bettersizer ST | 0.755 | 2.055 | 5.47 | Bettersizer ST | 10.6 | 23.79 | 44.68 |
c) Use Bettersize standard to verify accuracy
Reliable performance and easy operation
Reliable performance is achieved thanks to:
- Use of high quality components.
- Components are inspected and recorded for traceability. A 48-hour failure test before instruments leaves the factory.
- Use of advanced technologies such as dry burning-resistant ultrasonic, auto alignment, dew-point temperature detecting and others
- Comply with CE, FDA 21 CFR Part 11 and ISO 9001-2008 certification.
Easy operation:
Just adding the sample, the system will automatically perform the analysis, including routines as water supply, dispersion, circulation, concentration adjustment, test, draining, cleaning, print report and saving data. If the concentration is high, the system will dilute automatically. If the concentration is low, the system will show “add sample”, to guarantee that the concentration always is at an adequate level. The complete automation is not only for easy of use, more importantly, it reduces the errors caused by human factors and providing consistent results.
Unique technology for reliable quality
Dual lenses optical system (DLOS):
Dual lenses optical system (DLOS) is a patented technology invented by Bettersize. Dual lenses optical system (DLOS) integrates forward, lateral and backward scattering; detection quantity of scattered lights will be doubled. Compare with single lens laser particle size analyzer, it improves detection range, test precision for fine particles and resolution. Compare with dual beam particle size analyzer, it improves performance reliability.
Auto alignment technology:
The auto alignment system invented by Bettersize is composed of stepping motor, precise guide rail, subdivision controller and software system. The minimum step is 1.3 micron, which ensures that the focus of laser beam always irradiates the center of the detector and improves the accuracy of the result.
Ingenious accuracy calibration technology:
All of the instruments have passed the calibration of standard sample, which fully ensures that the accuracy of test results. Meanwhile, provide standard sample with the instrument to the customer and users can verify the accuracy of the instrument at any time, to avoid the losses from inaccurate test results because of instrument drifting and voltage fluctuation.
Reliable circulating and dispersing system:
The liquid circulating and dispersing system of Bettersizer S2 includes anti-dry ultrasonic disperser, centrifugal circulating pump, auto supply water system, auto drainage and overflow preventing system.
Example of report (more than 14 report formats available)
Specification
| Testing parameter | Material |
| Particle size distribution | Suspension, emulsion, dry powder |
| General | Bettersizer 9300ST |
| Theory | Laser diffraction |
| Analysis theory | Mie and Fraunhofer |
| Testing speed | 3kHz |
| Typical measurement time | ≤10 second |
| Size | |
| Size range | 0.1 - 1000um |
| Number of size classes | More than 100 customized grades |
| Accuracy | ≤1% (GBRM D50) |
| Repeatability | ≤1% (GBRM D50) |
| Resolution ratio | Single peak, double peak, multi-peak |
| Optics | |
| Red light | Max. 3mW, Semiconductor optical fiber laser, 635nm |
| Lens arrangement | Dual lenses on the right and left of sample cell |
| Lens design | F-Theta Lenses |
| Effective focal length | 223mm |
| Detector | |
| Arrangement | Log-spaced array |
| Quantity | 86 pieces (forward, sideway, backward) |
| Light path adjustment | Intelligent automatic alignment |
| Sample dispersion system | |
| Dispersion type | Wet |
| Dispersion system | Ultrasound 50W, 38 KHz
Dry burning-resistant protection system |
| Water circulation | Centrifugal pump, 500 -2500 ml/min,
auto water intake and rinsing |
| Water capacity | 600 ml |
| Software | |
| 21 CFR Part 11 | Enable |
| SOP Designer | Enable |
| Report | More then 14 formats report |
| Auto test | Enable |
| Data export | EXCEL, PDF,WORD, JPG and etc. |
| System compliance | |
| Laser class | Class I laser product |
| System | |
| Supply voltage | 220VAC |
| Dimension | 660mm x420mm x 320mm (L x W x H) |
| Weight | 38kg |
| Computer specification | |
| Computer interface | At least a USB2.0 port required |
| Operation system | Windows XP, Windows 7,8 or 10 |
| Hardware specification | Intel Core I5, 4GB RAM, 250GB HD |
ication