Beijing JWGB Sci & Tech Co.,Ltd., is a premier hi-tech company specialized in nitrogen adsorption specific surface area and pore size distribution analyzer manufacturing. During the past several years, the company has all along carried out research and development, and innovation independently. The company has made significant achievements and was honored as the pioneer in the development of nitrogen adsorption analyzer in China. In 2000, JWGB's engineers from Beijing Institute of Technology successfully developed a new model of dynamic contrast method for specific surface area analyzer, which ushered in a new era of manufacturing technique of nitrogen adsorption analyzer in China. In 2004, JWGB developed the first dynamic BET specific surface area analyzer，which marks a great leap in the manufacturing technique of dynamic nitrogen adsorption analyzer. In 2005, dynamic pore size distribution analyzer was developed, which symbolizes an important breakthrough in the technique and utilization of the nitrogen adsorption analyzer. In 2007, nitrogen adsorption specific surface area analyzer applying static volumetric method was made, which now substitute the imported analyzer, the marks China is entering into the top developers in manufacturing as well as application of the nitrogen adsorption analyzer. In 2008, JWGB was the only manufacturer in China chosen to participate in the compile of “National Specific Surface Area Standards for Calibration Test”.