Patent ID: 7401509

Claim:
A device for determining at least one parameter of a medium flowing in a main direction of flow in a line, comprising: a part capable of insertion into the line with a predeterminable orientation in relation to the main direction of flow in such a manner that a partial stream of the medium flowing in the line passes into an entry region of a channel structure formed in the part; and a structure including a measuring channel and provided with a measuring element for determining the at least one parameter, the measuring channel branching off from the entry region, wherein: the entry region includes a separation zone that is separated from the measuring channel, the entry region includes at least one separation aperture that opens into the line at a side wall of the part, the side wall extends substantially parallel to the main direction of flow, and the part includes at least one wind shield disposed downstream of the at least one separation aperture in the main direction of flow and that projects from the side wall provided with the separation aperture.