Flow meter with ultrasound transducer directly connected to and fixed to measurement circuit board

An ultrasound flow meter unit comprising:

• a first ultrasound transducer formed from a monolithic body of piezoelectric material having a first electrical terminal and a second electrical terminal
• a multi-layer circuit board comprising:
• at least a first layer and a second layer, the first layer having an upper surface facing away from the second layer and the second layer having a lower surface facing away from the first layer, wherein the upper surface of the first layer is at least partially covered by an upper conductive layer and the lower surface of the second layer is at least partially covered by a lower conductive layer, and wherein the at least first and second layers comprise one or more vias adapted to provide electrical contact from one side of the at least first and second layers to another side of the at least first and second layers respectively;
• a first conducting path electrically connected to the first electrical terminal disposed at least partially between the first layer and the second layer
• a second conducting path electrically connected to the second electrical terminal;
• and
• wherein the monolithic body is mechanically fixed to a first portion of the multi-layer circuit board.