Patent ID: 8234914

Claim:
An apparatus for determining at least one parameter of a medium flowing in a main flow direction, in an intake air mass of an internal combustion engine, comprising: a plug-in part that has a longitudinal extension axis and is introducible into the flowing medium with a predetermined alignment with respect to the main flow direction, the plug-in part including: at least one inlet opening; at least one outlet opening, wherein at least one main channel connects the inlet opening and the outlet opening, wherein at least one measurement channel branches off from the main channel; at least one sensor element, which is in the measurement channel, for determining the at least one parameter; wherein at least one directing surface, which diverts the flow of the medium from the measurement channel, is provided before a branching point of the measurement channel from the main channel, and wherein the at least one directing surface is disposed at least in part at an angle α different from 90° with respect to a plane that is spanned by the main flow direction and the longitudinal extension axis.