The different stainless-steel adsorbers can accommodate either representive sample amounts of industrial adsorbents to simulate an authentic fixed bed adsorber with realistic gas flow compositions or very representative small sample amounts of powders to investigate mixture gas equilibria on novel materials. Sample preparation can be performed in-situ using either inert gas flux or vacuum at temperatures up to 400 °C. Regulating the temperature of the inlet gas and the adsorber allows for uncompromised temperature control throughout the measurement. High precision mass flow con- trollers are used for quick and stable gas mixing and flow rate control. The adsorber pressure is regulated automatically and the pressure drop between adsorber inlet and outlet will be measured by the device. The direction of gas flow through the adsorber for mixSorb L can be switched between up and down-stream to allow inves- tigation of bed regeneration, adsorption desorption cycles, and long-term stability of the technical adsorbent.