G - Physics – 01 – F
Patent
G - Physics
01
F
354/27
G01F 17/00 (2006.01) G01F 23/14 (2006.01)
Patent
CA 1201532
ABSTRACT This invention relates to apparatus for determining the amount of liquid in a tank by measuring the pressure at the bottom and at a height above the bottom of the tank, and provides apparatus for compensating for apparent volume measurement variations caused by expansion and contraction of the tank and liquid with variation in temperature. A tube which expands in length at an exactly compensating rate varies the height of the second pressure sensor relative to the first. A further embodiment is a pneumatic system which avoids the necessity to immerse the pressure sensor, and utilizes an inexpensive single differential pressure transducer instead of two, and which cancels out the effect of any changes in zero setting of the transducer, changes in sensitivity of the transducer, or changes in atmospheric pressure.
431065
Pakwa Engineering Ltd.
Shapiro Cohen
LandOfFree
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