Patent ID: 7701118

Claim:
Ultrasonic flow rate measuring device for measuring a flow rate through a line through which a medium flows, comprising: at least one ultrasonic transducer including a piezo element and a connecting element designed for attaching the ultrasonic transducer to the line to be measured, wherein the piezo element is attached to the connecting element with an intermediate layer, including a plate, disposed between the piezo element and the connecting element, wherein the intermediate layer is electrically conductive and contacts the piezo element, wherein the intermediate plate has at least one recess formed therein, and wherein a layer of adhesive is provided in the recess, the adhesive attaching the piezo element to the connecting element, further comprising electronic elements that form an ultrasonic transducer in conjunction with the piezo element that is operable with a predetermined ultrasonic frequency, wherein the thickness of the intermediate plate equals one fourth of the ultrasonic wavelength in the layer of adhesive at the predetermined ultrasonic frequency.