BET Surface Area Analyzer
BETA202A
I. BET Surface Area Analyzer - Scope of Application and Functions
1. Wide applicability: Suitable for measuring powders such as building materials, graphite, battery materials, zeolites, carbon materials, molecular sieves, alumina, soil, organic compounds, as well as various blocks, sheets, and polymer fibers.
2. Powerful functions, including all current data processing methods: single-point and multi-point BET surface area. Langmuir surface area. Particle size estimation and true density testing, porosity and pore structure analysis. Adsorption/desorption isotherm analysis. BJH mesopore and macropore volume, pore area distribution by pore size, total pore volume, etc. Can add t-plot micropore analysis, as-plot micropore analysis, MP micropore analysis, etc. Can perform micropore DR theory, HK slit pore theory, SF cylindrical pore theory analysis, and can add DFT density functional theory, including NLDFT.
II. Software Functions:
1. Optional USB or network port connection; network port connection enables remote control of the instrument, remote fault diagnosis, and can achieve one computer controlling multiple devices via a router, saving resources for customers.
2. Optimized vacuum pump start-stop management system: during testing, the vacuum pump does not need to run continuously, reducing noise and extending the vacuum pump's lifespan.
3. Automatic atmospheric pressure recovery function, facilitating sample removal and ensuring no sample splashing.
4. Automatic high vacuum detection system ensures that tests are conducted under high vacuum conditions, ensuring the accuracy of test results.
5. Automatic emergency handling system can ensure the instrument automatically recovers to normal in sudden situations such as power outages or quartz tube breakage.
6. Powerful database storing dozens of test modes; customers can also create test modes more suitable for their own products based on their needs, for more precise testing.
7. After power outage, the test system recovery function. During surface area and pore size analysis, the vacuum degassing process is quite lengthy. If a sudden power outage interrupts the test, it is a very painful and helpless situation. Not only is data lost, but it also delays scientific research progress. This function is particularly important at such times.
8. Supports PDF electronic printing and Excel data export, as well as selective printing of various theoretical data. It also allows comparison and printing of data and distribution curves from different times, same sample, and same test mode.
9. Supports operation in both Chinese and English interfaces and printing test reports in both Chinese and English.
III. Technical Requirements:
1. Vacuum system: The vacuum system specially designed by the Chinese Academy of Sciences for this series, with all stainless steel piping and international vacuum solenoid valves, achieving higher vacuum (up to 10-8 Torr) and maintaining high vacuum for longer. Basic configuration vacuum pump 10-2pa (10-4 Torr). P/P0 up to 10-7.
2. Intelligent selection of multi-capacity space technology;
3. All stainless steel vacuum system connections sealed with metal sealing technology;
4. The inner wall of the vacuum system adopts silver plating technology.
5. The vacuum system uses a technology with an additional vacuum protective layer outside the test space.
6. Detection system: Imported capacitive absolute pressure thin film pressure transmitter with accuracy up to 0.1% (0-10 Torr --- equivalent to 0-1.33KP, 0-1000 Torr ------ equivalent to 0-133.3kp), with up to 24-bit AD acquisition circuit ensuring data accuracy. Can perform tests on thousands of points.
7. High-quality control valves ensure very stable evacuation and gas intake, without sample splashing. Special gas path treatment avoids secondary contamination during sample tube transfer from degassing station to analysis station. Advanced technology that performs heating degassing and sample analysis simultaneously without contaminating the sample analysis pipeline.
8. Sample testing and treatment at the same position achieve the best degassing effect. At the same time, it avoids repeatedly disassembling samples and exposing them to air, which affects adsorption capacity. We use a three-way valve above the sample chamber to cleverly separate the test pipeline and heating degassing pipeline, ensuring that impurities generated during degassing do not contaminate the test pipeline and vacuum gauge. This is our core technology.
9. Independent P0 tube ensures accurate P0 value. P/P0 up to 0.9995.
10. BETA202A is equipped with a large-capacity liquid nitrogen Dewar flask, ensuring 70 hours of unattended operation. HYA is also equipped with a liquid nitrogen isothermal jacket to ensure constant temperature below the jacket throughout the analysis process. An automatic liquid nitrogen refill system can be added for sample testing of any required duration.
11. Truly unattended operation: the instrument panel has no manual buttons; all operation procedures are controlled by the computer.
12. Wide analysis range: surface area from 0.0005m2/g (Kr measurement) to unlimited. Pore size analysis 0.35nm-500nm. Minimum pore volume detection: 0.0001 cc/g. (Nitrogen adsorption, can be equipped with high vacuum system). Test accuracy: repeatability error <±1%.
13. BETA202A is equipped with 3 sensors: one for real-time P0 testing to ensure accuracy, and the other two for simultaneous analysis of 2 samples, allowing simultaneous testing of surface area and pore size distribution of 2 samples. (Note: molecular pump can be added as needed).
14. Only nitrogen is required for testing, no helium needed (helium is expensive and hard to obtain), saving customers money.
15. Surface area: 25 minutes per sample; conventional pore size: 3.5 hours per sample.
16. Can perform adsorption analysis with N2, Ar, Kr, NH3, CO2, H2, CO, O2, methane, butane, and other non-corrosive gases.
17. Optional USB or network port connection; network port connection enables remote control of the instrument, remote fault diagnosis, and can achieve one computer controlling multiple devices via a router, saving resources for customers.
IV. Safety Protection:
This instrument has comprehensive safety protection measures:
Circuit protection control of this test instrument:
(1) Overpressure protection (2) Overcurrent protection (3) Short circuit protection (4) Leakage protection (5) Software misoperation protection
V. Test Method
Automatic vacuum testing
