Introduction of Bettersizer S2-WD
Bettersizer S2-WD particle size analyzer is an intelligent dual-purpose particle size analyzer. Dry dispersing system adopts Venturi dispersing effect to ensure that powders are in complete dispersing state when pass test window by the way of shear, inertia, collision etc. The instrument has outstanding characteristics including accurate and reliable, good repeatability, easy operating, fast test speed, wide test range, etc. It is a new generation of particle size analyzer integrated dual lenses technology and intelligent test technology, which especially suits large enterprises, universities and colleges, research institutes and key laboratories 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
- High precision lenses with clear image and low distortion, ensures that weak scattered light signals and
light signals from various angles can be completely detected.
- Adopts dry dispersing system which is uniquely designed, through the measures of shear, inertia, collision, etc., to ensure that the powders are in complete dispersing state when pass test window.
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 90 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 overseas advanced laser particle size analyzer: Good consistency.
| Caco3 | D10 | D50 | D90 |
| Other brand | 0.981 | 5.144 | 19.122 |
| Bettersizer S2-WD | 0.943 | 4.936 | 19.22 |
| Silica | D10 | D50 | D90 |
| Other brand | 39.89 | 60.499 | 91.083 |
| Bettersizer S2-WD | 37.08 | 60.64 | 93.83 |
c) Use of 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.
Powerful software:
Use of Mie scattering theory and free mode inversion algorithm to obtain accurate particle size distribution. Use of the exclusive “project” concept to save results and multi-language function to easily change languages. The software provides safety management function, when enabled, the use of password is required to login into the software.
Reliable circulating and dispersing system:
The wet circulating and dispersing system of Bettersizer S2-WD included anti-dry ultrasonic disperser, centrifugal circulating pump, auto water supply system, auto drainage and overflow system, applies to all kinds of samples. Dry feeder adopts Venturi dispersion, which ensures that sample can be dispersed completely and ensures accuracy and repeatability of the test.
Example of report (more than 14 report formats available)
Specification
| Testing parameter | Material |
| Particle size distribution | Suspension, emulsion, dry powder |
| General | Bettersize S2-WD |
| Theory | Laser diffraction |
| Analysis theory | Mie and Fraunhofer |
| Testing speed | 3kHz |
| Typical measurement time | ≤10 second |
| Size | |
| Size range | Wet 0.02 - 2000um Dry 0.1-2000um |
| Number of size classes | More than 100 customized grades |
| Accuracy | Wet ≤0.5% (GBRM D50) Dry≤3% (GBRM D50) |
| Repeatability | Wet ≤0.5% (GBRM D50) Dry≤3% (GBRM D50) |
| Resolution ratio | Single peak, double peak, multi-peak |
| Optics | |
| Red light source | 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 | 90 pieces (forward, sideway, backward) |
| Light path adjustment | Intelligent automatic alignment |
| Sample dispersion system | |
| Dispersion type | Wet & Dry |
| 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 |
| Air flowrate | 400-6000L/min |
| Air compressor | Gas container ≥ 60L, pressure ≤ 8bar |
| Vacuum cleaner | Wet dust collector or bag filter |
| Air filter | 3 um, 0.3 um, 0.01 um |
| 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 | 800mm x 500mm x 410mm (L x W x H) |
| Weight | 45kg |
| 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 |