1. Analysis method and principle.
At a fixed temperature, after measuring the amount of gas adsorbed on the solid surface at different relative pressures, the specific surface area of ​​the solid can be calculated based on the Brownor-Emmett-Taylor (BET) multilayer adsorption theory and its formula, based on Kyle The capillary condensation theory and its formula in this paper, Wheeler's theory on comprehensive consideration of capillary condensation and multi-layer adsorption, can in principle calculate the fine solid specific surface area.
SSA Series Specific Surface Analyzer Technical Index and Application Range:
1. Measurement repeatability error ≤2%
2. Measuring range
Specific surface measurement range: 0.01㎡ / g ≤ X㎡ / g ≤ 3500㎡ / g
3. Baseline stable line
The half-hour baseline drift is not greater than 0.1mv, and the noise is not greater than 0.05mv.
4. Required gas purity
Adsorption substance-nitrogen, purity is more than 99.99%.
Carrier gas-helium or hydrogen with a purity of more than 99.99%. (Note that the measured object cannot interact with hydrogen)
5. Instrument power supply
AC 220v ± 10%, current frequency 50 Hz, power not more than 200 watts.
6. Host size: 600Χ800Χ410 mm3
Weight: about 45KG.
7. Computer equipped system:
Processor: Intel Pentium 2 or above
Memory: 64MB or more
Display equipment: 17-inch flat-screen high-resolution color display
Operating system above Windows98
8. Sampling frequency: 100HZ
9. Minimum peak width: 0.1min
10. Minimum peak height detection limit 20uV
This product has applied for a patent, the patent number is 02229474.0
Perfect service system
In order to enable the technical personnel of the customer to master the operation of the equipment and maintain the normal operation of the entire system, understand the new development direction of the technology involved and strengthen the cooperation between the two parties. After the cooperation agreement between the two parties comes into effect, Beijing Biode will send special personnel to arrange a series of training on specific technologies and basic knowledge of equipment according to user needs. In order to enable the customer's technical staff to master the method of using the instrument in the shortest time, so that the instrument equipment of the Biotech company can play its greatest use in your enterprise.
The instrument product warranty period of Biotech Electronics is up to 5 years. The technical support center provides 5 days and 8 hours of service, and under special circumstances can provide 7 days and 24 hours of service. During the warranty period, we will provide users with comprehensive troubleshooting technical services and full troubleshooting monitoring, starting from the fault until the fault is completely eliminated.
2 Instrument characteristics and industry advantages
The new SSA series is fully automated. The operation of the computer can be used to display the desorption procedure and surface area. The front panel LCD screen displays current, voltage and curve in real time, enabling the operator to monitor the status of the instrument at any time.
l After the gas is desorbed, the instrument uses a thermal conductivity cell and the highest precision 24-bit A / D converter to measure the converted signal.
l And through the national patent built-in analog-to-digital conversion system and operating software to achieve computer data collection and micro-processing. Because the entire measurement, conversion and calculation process uses extremely high-precision software and hardware, the repeatability error has been greatly reduced, basically kept below 1% -3%.
l The computer digital interface of the instrument realizes the integration of analog-to-digital conversion, which greatly reduces the attenuation of digital signals, enhances the stability of the analysis process and the reliability of the test data.
l It is easier to operate than other equipment. Anyone without training can learn to operate and use in a short time. The operating software developed by Biotech Electronics can be installed and used on platforms such as WIN98, WINME and WIN2000.
l The automatic elevator for raising and lowering the liquid nitrogen bath is the characteristic of the SSA series, which realizes the automation of adsorption and desorption, and further improves the performance of the instrument.
l The connection method of continuous flow method avoids the appearance of dead volume, and the dual protection of software and hardware ensures the reliable operation of the instrument system.
l The gas path is completely connected with stainless steel pipes to prevent internal aging and ensure that the instrument can be used all year round.
The flow rate of the four groups of new SSA-3600 gas is regulated by the shunt, and the digital display system has also obtained national patents
High-quality hydraulic beauty bed with simple design and complete functions
The hydraulic beauty bed is competitive in price and has a wide range of practicability. At the same time, there is also a matching swivel chair, which is more convenient to use. Our company also has electric beauty beds and treatment beds for selection.
The hydraulic beauty bed also called hydraulic facial bed,beauty bed,the bed with the function of raising and lowering, the legs can be controlled individually, and the angle can be adjusted by rotating.We also accept customized color and size and function.
Hydraulic Massage Bed,Massage Tables,Facial Bed,Hydraulic Facial Bed
Foshan Meilan Metal Products Co., Ltd , https://www.meilansalon.com