Patent ID: 7162920

Claim:
A device for determining at least one parameter of a medium flowing in a conduit in a main flow direction, comprising: a conduit part that forms a conduit passageway; a sensor device having a bypass part that is situated in the conduit part in such a way that a partial stream of the medium flowing in the conduit part flows into an inlet area of a channel structure formed in the bypass part, the inlet area having at least one separation opening that, at a side wall of the bypass part, opens into the conduit passageway; and a flow vane extending at least about parallel to the side wall, having the separation opening, of the bypass part, the flow vane being situated in the conduit part, behind the separation opening, seen in the main flow direction, wherein the conduit part includes, in an area of the bypass part, at least one projection that protrudes from an inner wall of the conduit part towards the bypass part.