System and method for detecting liquid leakage in storage tanks

Measuring and testing – With fluid pressure – Leakage

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73299, G01N 326

Patent

active

047918144

ABSTRACT:
A liquid leakage detection system for use in underground storage tanks includes at least two vertically-disposed tubular members mounted to be partially immersed in liquid in the tank. A valve selectively opens and closes the lower end of at least one of the tubular members and air-bleed valves are connected to the upper ends of at least two other of the tubular members. With the air-bleed valves closed, a differential pressure transducer is connected to sense the gas pressure in the tubular members. A control system selectively operates the valves so that the pressure transducer indicates changes in liquid levels within the tank caused by leakage.

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