A central body for a hydraulic system for fluid, including a frame having a first tubular end for connecting an upstream hydraulic circuit including a first fitting, and a second tubular end for connecting a downstream hydraulic circuit including a second fitting, the central body including a passage passing through the frame in order to convey the fluid coming from the upstream hydraulic circuit to the downstream hydraulic circuit, the frame being produced from an electrically insulating material, the central body including a printed circuit having controlled electrical properties in order to conduct a part of the electrical charges flowing in the upstream hydraulic circuit and the downstream hydraulic circuit.
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