A flow sensor arrangement (S35, S36. S37, S39, . . . ) is located on an elongated body (C1, C2, C3, . . . ) for measuring the flow of a fluid, with one or more flow sensors (S1, S2, S3, . . . ) being arranged on the elongated body (C1, C2, C3, . . . ) to measure the flow along different spatial directions.