LIQUID DENSITY METERING DEVICE Russian patent published in 1995 - IPC

FIELD: measurement technology. SUBSTANCE: device has tubular cavity and piezoelectric transducers arranged along its longitudinal axis at certain distance from each other and made as annular piezoelectric-crystal plates connected either to pulse generator or to ultrasonic detector. Tubular cavity is sealed on one end immersed in liquid vessel. One piezoelectric transducer connected through leads to detector is secured on inner surface of cavity at sealed end while other transducer connected through leads to generator is mounted on external surface of cavity above point of its fixation to vessel through insulating gasket. Similar plates are placed on both sides of annular piezoelectric- crystal plates, the latter and the former being glued together on end surfaces and stuck to cavity over cylindrical surface. EFFECT: improved design. 1 dwg