Sensor device for determining at least one parameter of a fluid medium flowing through a duct

A sensor device for determining at least one parameter of a fluid medium flowing through a duct, e.g., an intake air mass flow of an internal combustion engine, includes: a sensor housing (12), e.g., a sensor plug that is placed or that can be placed into a flow tube, in which the duct (14) is fashioned; and at least one sensor chip situated in the duct (14) for determining the parameter of the fluid medium. The sensor chip (30) has a sensor area. The sensor housing has an inlet into the duct that is oriented opposite a main direction of flow of the fluid medium, and has at least one outlet from the duct. The sensor area (32) is covered at least partly by an electrically conductive layer.