Apparatus for determining and / or monitoring of the volume - or mass flow rate and a medium through a pipeline

摘要

The present invention relates to an ultrasound - flow meter (1) with at least one ultrasonic sensor (2). The ultrasound - flow meter operates according to the transit time difference method, the cross-correlation process or the doppler method.The ultrasonic sensor (2) has a housing (7), a piezoelectric element (3) and a of at least two positive partial elements (5, 6) existing probe tip (4), wherein the partial elements (5, 6) of the launching element (4) are designed so that they the ultrasound - measuring signals in a selected region of the pipeline (12) are focused, wherein the materials of the partial elements (5, 6) of the launching element (4) are selected so that the transmission of the ultrasound - measuring signals on the by the probe tip (4) extending sound path (sp) is a maximum, and wherein the housing (7) is configured in such a way that in the probe tip (4) or in the wall (18) of the pipeline (12) multiply reflected measurement signals are damped.