Patent ID: 6973823

Claim:
a device for determining at least one parameter of a medium flowing in a line ( 3 ), in particular the intake air mass of an internal combustion engine, having a part ( 6 ) provided for permitting introduction into the line, the part having at least one measuring channel ( 30 ) for conducting through at least one substream of the medium flowing in the line, and having at least one measuring element ( 9 ) situated in the measuring channel for determining the at least one parameter, the part ( 6 ) being insertable into the ( 3 ) in an axial direction ( 12 ) with a predetermined orientation with respect to the medium flowing in the line in a main flow direction ( 18 ) and a channel structure being formed in the part ( 6 ) which has an inlet area ( 27 ) having an orifice ( 21 ) to permit entry of a substream of the medium into the channel structure as well as at least one measuring channel ( 30 ) branching off from the inlet area, the measuring channel having an outlet orifice ( 34 ) opening toward the outside of the part ( 6 ), wherein the orifice ( 21 ) has an upper restriction ( 36 ) lying closest to the measuring element ( 9 ) in the axial direction ( 12 ) through which restriction ( 36 ) a plane runs parallel to the main flow direction ( 18 ) and perpendicular to the axial direction ( 12 ), and the inlet area ( 27 ) has a discharge zone ( 28 ) which, on a first lateral wall ( 17 ) of the part, has a discharge orifice ( 33 ) that opens toward the ambient environment and is closed on a second lateral wall ( 20 ) diametrically opposite the first lateral wall, the discharge orifice ( 33 ) being situated with regard to the axial direction ( 12 ) on a side of the plane ( 39 ) on which the measuring element ( 9 ) is not situated, and the channel structure having a projection ( 37 ) protruding into the inlet area, at which the medium entering the inlet area is diverted away from the plane ( 39 ).