Measuring and testing – With fluid pressure – Leakage
Patent
1991-12-05
1994-05-31
Williams, Hezron E.
Measuring and testing
With fluid pressure
Leakage
73 491, G01M 308, G01M 328
Patent
active
053158628
ABSTRACT:
A flow meter for determining rates of fluid flow in a fluid conduit where the flow rates are low. The flow meter comprises a parallel combination of a controllable valve and a pressure differential sensing device coupled to the conduit. The flow meter operates by maintaining equal pressure on both sides thereof. When pressure unbalance occurs, the flow meter and associated control apparatus measures the amount of fluid necessary to equalize pressure. The frequency of fluid replenishment necessary to equalize the pressure determines flow rate.
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Kobold Instruments catalog on flow sensors and switches, comprising 12 pages and front and back covers.
Gems Express Service trade literature "Level and Flow Sensors" comprising 11 pages and front cover, 1990 Edition.
Dombroske George M.
Williams Hezron E.
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