This study deals with attrition due to the impacts of crystals against the impeller or the walls of a crystallizer. An attrition experiment in solution is designed in order to isolate the effect of a single impact of a suspension of crystals on a target simulating a part (fixed or mobile) of a crystallizer. The experimental devices and methods are described. The velocity and the energy of the impacts generated are evaluated by visualization and by laser Doppler velocimetry. An example of results performed with NaCl crystals is presented.