LIQUID MASS DENSITY METER Russian patent published in 1995 - IPC

FIELD: measurement technology. SUBSTANCE: symmetric bridge reactive circuit is used for measurement which is provided with unit for automatic bringing of bridge into equilibrium. The bridge has linear element and unit for counting readings (indicator). Capacitive detectors for measuring volume of column of liquid in tank and weight of column of liquid in the tank are brought into two adjacent arms of the bridge; the shoulders are disposed symmetrically relatively feeding diagonally opposite pair of junctions of the bridge. Plates of feedback variable capacitors are connected with the third arm of the bridge. Rotors of the capacitors are fixed rigidly to output shaft of reducer of the unit for automatic equalizing of measuring bridge circuit. Feeding diagonal of the bridge and its external circuit are provided with the first and the second thermocompensating circuits correspondingly. EFFECT: improved precision of measurement. 3 cl, 1 dwg