BET Specific Surface Area Analyzer
BETA202A
I. BET Specific Surface Area Analyzer - Scope of Application and Functions
1. Wide applicability: including measurement of building materials, graphite, battery materials, zeolites, carbon materials, molecular sieves, aluminum dioxide, soil, organic compounds and other powders, as well as various blocks, sheets, polymer fibers, etc.
2. Powerful functions, including all current data processing methods: single-point and multi-point BET specific surface area. Langmuir specific surface area. Particle size estimation and true density testing, porosity and pore structure analysis. Adsorption and desorption isotherm analysis. BJH mesopore and macropore pore volume, pore area distribution over pore size, total pore volume, etc. Can add t-plots micropore analysis, as-plots 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, etc.
II. Software Functions:
1. Can choose USB connection or Ethernet port connection. Ethernet port connection enables remote control of the instrument, remote fault diagnosis, and can achieve one computer controlling multiple devices through a router, saving resources for customers.
2. Optimized vacuum pump start-stop management system. During the test, the vacuum pump does not need to run continuously, reducing noise and extending the vacuum pump's lifespan.
3. Automatic atmospheric pressure recovery function, convenient for sample removal, and ensures 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 returns to normal under sudden power outages, quartz tube breakage, and other unexpected circumstances.
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 of products.
7. After power outage, the test system recovery function. During specific surface area and pore size analysis, the vacuum degassing process is quite lengthy. If a sudden power outage interrupts the test during testing, it is a very painful and helpless thing. Not only does it lose data, but it also delays scientific research progress. This function is particularly important at this time.
8. Can perform PDF electronic printing and Excel data export, as well as printing of various theoretical data selections. It can also compare and print data and distribution curves of the same sample under different times, same test mode, and view and print them.
9. Can operate in both Chinese and English interfaces and print test reports in both Chinese and English.
III. Technical Requirements:
1. Vacuum system: The vacuum system specially designed for this series by the Chinese Academy of Sciences, with all stainless steel pipelines and international vacuum solenoid valves, achieving higher vacuum (up to 10-8 Torr) and maintaining high vacuum for a longer time. Basic configuration vacuum pump 10-2pa (10-4 Torr). P/P0 can reach 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 adopts a technology of adding an additional vacuum protective layer outside the test space.
6. Detection system: imported capacitive absolute pressure thin film pressure transmitter, with accuracy reaching 0.1%, (0-10 Torr --- equivalent to 0-1.33KP, 0-1000 Torr ------ equivalent to 0-133.3kp) and up to 24-bit AD acquisition circuit to ensure data accuracy. Can perform tests on thousands of points.
7. High-quality control valves make gas extraction and intake very stable, without sample splashing. Special gas path treatment avoids secondary contamination during the transfer of sample tubes from the degassing station to the analysis station. Advanced technology that allows heating degassing and sample analysis to proceed simultaneously without contaminating the sample analysis pipeline.
8. Sample testing and treatment are performed at the same position, achieving the best degassing treatment effect. At the same time, it avoids the sample being disassembled and exposed to air, affecting adsorption capacity. We use a three-way valve above the sample chamber to cleverly separate the test pipeline and the heating degassing pipeline, so that impurities generated during degassing do not contaminate the test pipeline and vacuum gauge. This is our core technology.
9. Independent P0 tube ensures the accuracy of P0 value. P/P0 can reach 0.9995.
10. BETA202A is equipped with a large-capacity liquid nitrogen Dewar flask, which can ensure 70 hours of unattended operation. HYA is also equipped with a liquid nitrogen isothermal jacket to ensure constant temperature below the isothermal 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: specific surface area from 0.0005m2/g (Kr measurement) to no upper limit. Pore size analysis from 0.35nm to 500nm. Minimum pore volume detection: 0.0001 cc/g. (Nitrogen adsorption, can be equipped with high vacuum system). Test accuracy can reach repeatability error <±1%.
13. BETA202A is equipped with 3 sensors, one for real-time P0 testing to ensure P0 accuracy, and the other two for simultaneous analysis of 2 samples, allowing simultaneous testing of specific surface area and pore size distribution of 2 samples. (Note: molecular pump can be added as needed).
14. Only nitrogen is needed for testing, no helium required (helium is expensive and hard to buy), saving customers money.
15. Specific surface area: 25 minutes for 1 sample; conventional pore size: 3.5 hours for 1 sample.
16. Can perform adsorption analysis of N2, Ar, Kr, NH3, CO2, H2, CO, O2, methane, butane, and other non-corrosive gases.
17. Can choose USB connection or Ethernet port connection. Ethernet port connection enables remote control of the instrument, remote fault diagnosis, and can achieve one computer controlling multiple devices through a router, saving resources for customers.
IV. Safety Protection:
This instrument has relatively complete 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 test
