Adsorption equilibrium data for nitrogen, argon, methane, and oxygen on four activated carbons (Centaur, BPL, F30/470, WS42) and on one molecular sieve (CMS1) were obtained at 283 K, 303 K, and 323 K and at pressure up to 4000 kPa. A completely automated volumetric apparatus was used to measure gas adsorption. The coherence of the results is checked by comparing some data at 303 K to those obtained by a gravimetric apparatus. The average discrepancy between the two sets of data is 5% over the whole measurement range.