Electronic hydrometer and method of determining the density...

Details Electronic hydrometer and method of determining the density... Electronic hydrometer and method of determining the density...

G - Physics

01

N

73/40

G01N 9/14 (2006.01) G01N 9/20 (2006.01)

Patent

CA 1156854

ABSTRACT OF THE DISCLOSURE An electronic hydrometer for determining the density of a liquid, the hydrometer comprising a housing having a liquid receiving chamber and means to insert a liquid of which the density is to be determined in the chamber. A float having a known weight is disposed in the chamber. A connecting shaft is secured to the float and retained for guided displacement along its longitudi- nal axis in response to introduction of a predetermined quantity of liquid in the chamber. A sensor is associated with a shaft for detecting a reference position of the shaft. A permanent magnet is mounted in proximity of the shaft and has a magnetic core and a displaceable coil about the core. The coil is secured to the shaft. An electronic circuit means automatically adjusts the value of a current flowing in the coil to displace the coil and the shaft relative to the reference position. The value of the adjusted current is calibrated by the circuit to generate an output signal indicative of the density of the liquid in the chamber. - 1 -

384248

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