Introduction of Bettersizer SD (Dry):
Bettersizer SD (Dry) particle size analyzer is a high performance particle size distribution analyzer. Dry dispersing system adopts Venturi dispersing effect by measures of shear, inertia, collision, etc, to ensure that the powders are in complete dispersing state when pass through testing zone. Even for the sample which is difficult to disperse such as NdFeB powder, it can be dispersed completely and also accurate test result will be acquired. It adopts photodetector array of large size and high sensitivity made by large scale integrated circuit technique which is specially designed, and it has high resolution and good accuracy; adopts whole process Mie theory and data processing mode of multiple distribution models; adopts a series of advanced technologies and manufacturing techniques including high precision data transmission and processing circuit etc., to make the instrument has outstanding features including accuracy and reliability, fast test speed, good repeatability, easy operating, etc. It is a new generation of particle size test instrument which integrates laser technology, computer technology and photoelectron technology.
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
-Adopts uniquely designed dry dispersing system which 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 84 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.
| MedicineA | D10 | D50 | D90 |
| Other brand | 1.318 | 7.202 | 17.810 |
| Bettersizer SD | 1.342 | 7.146 | 18.570 |
| Lactose | D10 | D50 | D90 |
| Other brand | 39.890 | 60.499 | 91.083 |
| Bettersizer SD | 38.880 | 62.480 | 90.140 |
Reliable performance and easy operation
Reasons for low failure rate:
- 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: Auto test, auto alignment, continuous testing, conversion of report format, etc. It will take only ten minutes to learn and the result will not be affected because of different operators. Auto alignment system can ensure that light path always in optimum condition which makes the test more accurate.
Unique technology for reliable quality
Unique dry dispersing technology:
It adopts dry dispersing system which is uniquely designed, through the measures of shear, inertia, collision etc. to ensure that the powders are in completely dispersing state when pass test window. It adopts oil free and silent air compressor with high efficient water filter to guarantee that pure compressed air is produced. Meanwhile, it has the advantages of low noise, auto start, auto stop, long running time, etc.
Auto alignment technology:
Auto alignment system individually invented by Bettersize is composed of stepping motor, precise guide rail, subdivision controller and software system. Its function is to let the center point of photodetector which is installed on it always keep optimum location, to guarantee accuracy and precision of the measurement.
Software system:
The functions of the software system for Bettersizer SD are very powerful. Herein, only list the conversion of report format for example. Just click Excel, PDF, Copy and Export button, the conversion of report format can be realized. It is convenient for communication such as email, etc. The system has saved optical parameters of hundreds of materials, and almost covers all common samples, to ensure that the test result is more accurate.
Reliable dry feeding system:
The operations of BT-901 dry feeding system which matches Bettersizer SD (Dry), including sample feeding, gas feeding, pressure test, sample collection, etc., are controlled by computer uniformly. The operations are completed automatically according to the procedures set in advance and convenient for operating.
Examples for report type (more than 14 types are optional in total)
Specification:
| Testing parameter | Material |
| Particle size distribution | Suspension, emulsion, dry powder |
| General | Bettersizer SD |
| 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 | Wet ≤1% (GBRM D50) Dry ≤3%(GBRM D50) |
| Repeatability | Wet ≤1% (GBRM D50) Dry ≤3%(GBRM D50) |
| Resolution ratio | Single peak, double peak, multi-peak |
| Optics | |
| Red light | Max. 3mW, Semiconductor optical fiber laser, 635nm |
| Lens arrangement | Single lens |
| Lens design | F-Theta Lenses |
| Effective focal length | 223mm |
| Detector | |
| Arrangement | Log-spaced array |
| Quantity | 84 pieces (forward, sideway) |
| 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 |
| Dispersion system available | Solvent compatible system |
| 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 | 720mm x 300mm x 280mm (L x W x H) |
| Weight | 26kg |
| 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 |