The fully automated chemisorption analyzer AutoChem II 2920 can conduct studies of the chemical adsorption and temperature-programmed reactions. The instrument can obtain data on the physical properties of catalysts, the catalyst supports, and other materials. It can figure out the percentage of metal dispersion, the surface area of active metal, acid strength, surface acidity, distribution of strength of active sites, and BET surface area. Pulse chemisorption, temperature-programmed reduction, desorption, oxidation, and reaction analyses are conducted automatically by AutoChem II 2920. Its preparatory, carrier, and analysis gas ports contain four inlets which allow performance of four-gas sequential experiments. Four calibrated mass flow controllers provide accurate, programmable gas control. It has a powerful Windows that is operating and also a data reduction software.