In an internal combustion engine, the propagation of fuel spray jets leads to free-spray combustion and spray-wall combustion. The direct impingement of fuel spray on the cylinder liner and piston surface of an engine lead to soot formation close to the wall. Therefore, in order to meet the legislative requirements concerning exhaust gas emissions, fuel consumption and noise emissions of combustion engines, it is necessary to obtain an insight into the influence of spray-wall interactions on spray combustion and soot formation process. The mixture formation near the surface and consequently the combustion is mainly influenced by the injection process and the spray propagation on the wall. The scope of the experimental investigation is the characterisation of the near-wall soot formation and oxidation under engine relevant conditions. For the experimental investigation of spray-wall interactions a plate holder arrangement has been developed for the spray chamber. It allows a plate to be mounted at different impingement angles. The plate can also separately heated and temperature controlled.