The setup is dedicated to model catalysts preparation and characterisation, from single crystals up to supported nanoparticles, and to study their interaction with reactive gases. The setup is comprised of three parts: a UHV preparation chamber, a load lock for fast sample transfer and a spectroscopic cell for investigations under realistic catalytic conditions. The preparation chamber is equipped with the standard tools of surface science: an ion gun, gas dosing, PVD evaporator, mass spectrometer (for TPD) and LEED + Auger optics. Samples can be transferred without breaking the vacuum to the spectroscopic cell which allows to perform SFG (sum frequency generation) spectroscopy under reaction conditions. The cell is designed as circulating batch reactor with the possibility of gas analysis via MS. SFG probes vibrationally the sample in the 1000-4500 cm-1 range and provides inherently surface specific information about the species adsorbed on the specimen. Therefore it can be applied from UHV to ambient pressure and bridges the well-known gap between the classical UHV studies and real catalysis.