Device for detecting property e.g. velocity of air mass in motor car, has suction apparatus partly sucking flow barrier layer at fluid medium rush overable surface area, and sensor device detecting property of flowing fluid medium

摘要

The device (110) has a sensor device (126) detecting a property of flowing fluid medium. A suction apparatus partly sucks a flow barrier layer at a fluid medium rush overable surface area. The sensor device comprises an ultrasonic transducer and a reflecting surface (154) to reflect ultrasonic signals (152). The suction apparatus is partly integrated into a plug-in sensor, where the suction apparatus comprises an accelerator accelerating a part of the fluid medium. A suction slot i.e. annular and/or ring segment-shaped suction slot, is arranged at an inner side wall.