This refueling device for an aircraft (400) comprises a conduit (40) for circulating fuel, the downstream end (43) of which is equipped with a wing catch (42) for its connection to an orifice of. inlet of an aircraft fuel tank. This fender hanger comprises a body (421) which defines a fuel flow channel at the outlet of the duct, a sensor (501) for measuring the value of a parameter representative of a flow of fuel passing through the hanger. wing and at least one battery (502) for powering this sensor. The sensor and the power supply battery are housed in two half-shells (500A, 500B) mounted together around the body (421) of the wing hook (42).
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