Device for measuring the amount of a flowing medium

A device for measuring the mass of a flowing medium in the intake air of internal combustion engines, comprising a temperature-dependent measurement element around which the flowing medium is circulated and which is disposed in a measurement conduit that extends in the device, said conduit extends from an inlet to an outlet that is adjoined by a first section piece of a deflection conduit, into which the medium flows from the outlet and is deflected by an edge face of the first section piece into a second section piece of the deflection conduit, the edge face (45) of the first section piece (32) of the deflection conduit (31) is disposed in a projection of the outlet (36) in the flow direction (29) on an opposite wall of the first section piece (32) and is embodied inclined in relation to the flow direction (29) in the measurement conduit (30), and in the flow direction (29) a second section piece (33) adjoins the first section piece (32) of the deflection conduit (31) and at least one opening (55) is provided in the first section piece (32), in which said opening produces a connection to a medium that circulates around the device (1).