Measuring and monitoring system for level of fluid in container uses piezoelectric transmission electrode sending ultrasonic waves through fluid to receiving electrode on other side of container

摘要

The container (4) may be cylindrical with a vertical axis. The ultrasonic transmission electrode may be a piezoelectric element (1) made of 1-3 composite material, formed to fit on the curved side of the container. The element is exited by interdigitated metallized electrodes (2,3). The electrode assembly may include a reflector made by vapor deposition of aluminum. A similar electrode (5) may be attached to the other side of the container to receive sound waves transmitted through the fluid.