Water erosion is a natural phenomenon that can have a strong influence on the stability of civil engineering structures. Our objective is to propose a low cost field equipment allowing to generate and characterize the erosion of sediments present under a few decimeters of water. The PumpET (Pump Erosion Test) aims to be a field device dedicated to the measurement of erodibility, defined as the capacity of a material to erode river sediments in place. Its basic principle is the suction of water downstream of a centimetric submerged test channel placed on a sediment bed. The suction generates a controlled almost unidirectional flow inside the channel in order to erode the sediment. The erosive phenomenon is triggered when the critical constraint for the movement of the grains in the test zone is reached. For this purpose, the spatial and temporal evolution of the deformation (in mm) of the sediment surface enclosed in the measurement section will be followed. In this paper we do a brief state of the art before presenting the technical choices made. Then we present some results and discus them.