BET surface area is short. According to actual needs, BET surface area integral to the outer surface area, and better than the surface area; usually the case does not indicate specific surface area of powders is the external surface area per unit mass of powder particles and the internal surface area and pore structure, units m2 / g. 

 GC5890S automatic automatic nitrogen adsorption BET nitrogen adsorption instrument is currently the number of test functions and fully automated nitrogen adsorption specific surface area of automatic test equipment, by the Shanghai Branch Jie (Nanjing) Co., Ltd. to develop and produce. Domestic automatic nitrogen BET adsorption apparatus for the use of a wider series of automatic GC5890S nitrogen adsorption specific surface area tester, China has a large number of customers, in 2008 introduced several new automated nitrogen adsorption specific surface area tester, the only leader the country has a number of technologies, such as in situ treatment. wind-heat to help off. programmable six-way valve. detectors drift suppression. concentration chromatography and so on. makes domestic dynamic chromatography nitrogen adsorption specific surface area of automatic test equipment in a number of indicators beyond the import of automatic nitrogen adsorption specific surface area tester. widely used in graphite, batteries, rare earth, ceramic, aluminum, chemical and other industries and universities powder materials development, production, analysis, monitoring link. 

 GC5890S nitrogen adsorption specific surface area of automatic test instrument performance parameters: 
 Test method: versatility, multi-point method can be BET, BET single point method, Langmuir multi-point method, Langmuir single-point method, solid standard reference method and other test samples, statistical thickness method (calculated outer surface area), grain Estimating the sample BET adsorption constant C, such as testing methods; 

 Precision: high precision, good reproducibility. BET multi-point method, BET single point method, Langmuir multi-point method, Langmuir single-point method, testing the relative error of less than ± 2%; solid standard reference method test sample relative error of less than ± 1.5%; 

 Test range: testing a wide range of specific surface area can be determined in 0.01m2 / g within the scope of the above substances, substances and meet all the powder surface area porous materials testing; sample types: powder, granule, fiber and sheet materials. 

 Test Time: Test Time: BET multi-point method, and can test four samples tested and the average speed for each sample point for each determination of partial pressure for about 5 minutes total for each sample with an average of about 30min; BET single point method, while 4 samples can be tested, measured for each sample test and the average speed for about 5 minutes; solid standard sample reference method, while the test three samples, the average time is about 6 minutes of determination, only the test of time similar foreign equipment quarter; more test time does not include pre-purification sample purge time. 

 Purge processing: with the only integrated degassing device (non-split), to solve the degassing, test integration, to achieve the sample in situ treatment with a single installation, with zero contact with air to ensure that the sample the efficiency and effectiveness of pretreatment; 

 Thermal Aid of wind: wind-heat with the only help de-program-controlled device, guaranteed fast sharp desorption peak, reducing the background error; 

 Quantitative management program-controlled switching: a program-controlled six-way valve is the only calibration system, the action cycle of less than 10 milliseconds; and to quantify the volume control program-controlled switching; 

 Inhibition of zero-drift detector: the only detector with a constant temperature system, the drift detector test is less than 10min 0.1mV, to ensure the accuracy and stability test results; 

 Concentration of chromatography: the only chromatography with nitrogen partial pressure detection system, the relative flow method accuracy by 10 times, the nitrogen concentration of control accuracy and precision are up to ten thousandth, high stability; 

 Size model estimation: Estimating size with the only data processing functions, and gives size estimates report; this function is given according to the specific surface area of each model, the average particle size, particle shape on to play a guiding researchers to determine effect; 

 Gas Purification cold trap: the only gas purification with a cold trap, the gas purity increased by 1 order of magnitude or more; 

 Gas source switching protection: the only gas source switching with instructions and protection devices, breathe off automatically expire permanently avoid misuse charged for damage to the detector; 

 Purge time: purge with the only timing, timing accuracy of 1 second. Countdown to automatically cut off after the heating power, and voice prompts; 

 Temperature Monitoring: liquid nitrogen temperature monitoring, temperature of liquid nitrogen to eliminate differences of common industrial use of broad terms; room temperature monitoring, elimination of environmental temperature. 

 Test Accessories: standard high-purity He, high purity N2 gas mixture of nitrogen and helium 3 bottles of gas, the gas last longer, average more than 2 years; Bei Shide sample tube, to ensure the accuracy of the test tube also makes the kind of convenience sample not limited to powder samples test; 

 Control system: adsorption and desorption process of automatic process control, various important aspects of voice prompts; equipment operator for the operation of other work or leave, do not worry delayed test; 

 Test stability: 5 inch LCD large-screen liquid crystal display, various mechanical parts of the movement direction, the work of state parameters of the instrument software, hardware, also showed that even if the software does not open the instrument can also be accurately grasp the state, makes the instrument a higher degree of stability; 

 Test gas: low-temperature nitrogen adsorption dynamic chromatography, a unique parallel gas line at home and abroad, eliminating the environmental temperature, humidity, atmospheric pressure, outside influence, no vacuum, laboratory conditions require relatively relaxed; 

 Data processing: software for the self-developed high-precision data processing systems, high sampling frequency of 100Hz, automatic control; a functional surface area of data processing capabilities; USB communication interface; 

 Instrument Hardware: Hardware components with a stable and durable, the key parts are all imported parts, after rigorous testing, suitable for frequent testing; 

 Equipment sale: The company responsible for the on-site installation, commissioning, operation training, the implementation of the system regularly visit customers, attentive service, the customer a wide range of high credibility. 

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