It is designed using a usual mechanism in tilting bowls to measure the rainfall. The geometry and material of the gathering part allow an efficient water outflow, reducing pollution and errors. The gathering surface is 200 cm2 and the average resolution is 0.1 mm according to the recommendations of the WMO. The use of ground thermoplastic components offers high corrosion resistance. It includes leveling screws and a spirit level useful to be adjusted in the field. The water outflow is led through a pipe that allow to check the total rainfall.