LIQUID DENSITY METER AND ITS VARIANTS Russian patent published in 2023 - IPC G01N9/26 

FIELD: liquid density meters.

SUBSTANCE: group of inventions (versions) relates to liquid density meters in a medium with high external pressure, for example, for deep-sea oceanographic instruments. The liquid density meter has a vertical tube with a side hole and a nozzle at the middle of its height, connecting the internal area of the tube to the tank made of elastic material, a reference liquid that fills the inside of the tube and the cylinder, the first and second differential pressure sensors, respectively, in the lower and upper ends of the tube, installed inside the tube of the sensor of average temperature and average pressure of the reference liquid, four secondary measuring converters connected at the outputs of the sensors, a commutator of measuring signals, connected at the outputs of the secondary measuring converters, an analog-to-digital converter at the output of the switch and a processor at the output of the analog-to-digital converter.

EFFECT: enabling the use of a liquid density meter in deep-sea instruments and improving the accuracy of measuring the local density of a medium.

4 cl, 1 dwg, 1 tbl