The series of fully automatic specific surface area and porosity analyzers refer to ISO9277, ISO15901 international standards and GB-119587 national standards, according to the measurement principle of static volumetric method, through mass balance equation, static gas balance and pressure measurement to test the adsorption and desorption process, the test process Performed at liquid nitrogen temperature.   After a known amount of gas is filled into the sample tube, it will cause a pressure drop. From this, the molar mass of the adsorbed gas at the adsorption equilibrium can be calculated. Through the measured equilibrium adsorption capacity, the theoretical model is used to obtain the single-point and multi-point BET specific surface area, Langmuir specific surface area of ​​the tested sample; BJH mesopore and macropore volume, area distribution, total pore volume; t-plot micropore Volume and surface area, Dubinin-Astakhov micropore distribution, Horvath-Kawazoe micropore distribution; density function theory (DFT) and Monte Carlo (MC) pore size distribution model and other parameters. Modular gas circuit design drk-6210 series automatic specific surface area and porosity analyzer The series of fully automatic specific surface area and porosity analyzers introduce the most advanced design concepts in the world today, adopt a unique modular all-stainless steel vacuum circuit design and advanced anti-leakage and pollution-free measures to ensure the realization of high vacuum and avoid The disadvantage of easy leakage due to too many pipe joints. Constant temperature The self-developed metal Dewar flask can store liquid nitrogen for more than ten days due to its unique internal structure design. During the experiment, there is almost no loss of liquid nitrogen, thus ensuring the constant temperature of the tested sample and avoiding the glass bottle. The defect that the terracotta bottle is fragile and cannot be moved. High-precision sensor Multiple high-precision sensors and 22-bit AD conversion devices ensure the accuracy of specific surface area and aperture calculations. Advanced theoretical model Its advanced density function theory (DFT) and Monte Carlo (MC) pore size distribution model have established the dominant position in my country's specific surface area and porosity analyzer industry, and it is also at the leading level in the world. Operation automation The adsorption and desorption process are all controlled by computer, without manual operation Technical features: 1. Single-point and multi-point BET specific surface area, Langmuir specific surface area 2. BJH mesopore and macropore volume, area distribution, total pore volume 3. t-plot micropore volume and surface area, Dubinin-Astakhov micropore distribution, Horvath-Kawazoe micropore distribution 4. Density function theory (DFT) and Monte Carlo (MC) pore size distribution model Output report: Direct printing and EXCEL output of adsorption and desorption isotherm, BET specific surface area, Langmuir specific surface area, t-plot micropore volume, BJH pore volume, pore area, total pore volume, total pore area, Dbinin-Astakhov, Horvath-Kawazoe micropores Distribution, NLDFT/GCMC pore distribution, summary report. Application range: Research and product testing of various materials, including measurement of various materials such as zeolite, molecular sieve, silica, alumina, soil, clay, catalyst, organometallic compound framework structure, etc. model parameter WBL-810 WBL-820 WBL-830 Specific surface area 0.01㎡/g to no upper limit 0.01㎡/g to no upper limit 0.01㎡/g to no upper limit Aperture analysis range 3.5 to 5000 Angstroms 3.5 to 5000 Angstroms 3.5 to 5000 Angstroms Principles of the test Low temperature nitrogen physical adsorption (static volume method) Low temperature nitrogen physical adsorption (static volume method) Low temperature nitrogen physical adsorption (static volume method) Adsorbed gas Nitrogen Nitrogen Nitrogen P/P0 range 1×10-6―0.995 1×10-6―0.995 1×10-6―0.995 Pressure measurement Imported absolute pressure sensor 0-133KPa, accuracy 0.12%, 3 pcs Imported absolute pressure sensor 0-133KPa, accuracy 0.12%, 4 pcs Imported absolute pressure sensor 0-133KPa, accuracy 0.12%, 6 pcs Temperature measurement PT-100, accuracy 0.1℃ PT-100, accuracy 0.1℃ PT-100, accuracy 0.1℃ Dewar 2L, duration 80 hours 2L, duration 80 hours 2L, duration 80 hours Vacuum pump Mechanical pump Mechanical pump Mechanical pump Ultimate vacuum 1.0x10-4 Torr 1.0x10-4 Torr 1.0x10-4 Torr Measurement software Determination of adsorption/desorption isotherm Determination of adsorption/desorption isotherm Determination of adsorption/desorption isotherm Instrument size 700 X 700 X 800mm 700 X 700 X 800mm 700 X 700 X 800mm Simultaneously determine the number of samples 1, the number of processed samples is 3 2 pieces, 3 pieces of processed samples 3, the number of processed samples is 3