A crop measuring arrangement is arranged on a harvesting vehicle to interact with a material that is to be investigated in order to detect at least one component of the material, and that can be fastened to a vehicle by means of a retaining arrangement, so that the measuring arrangement can be operated in the condition in which it is fastened to the retaining arrangement in order to analyze material handled and/or processed by means of the vehicle. The retaining arrangement for securing the measuring arrangement to the vehicle is constructed so that the measuring arrangement can be easily separated from the retaining arrangement and used to investigate material in a stationary application.