Leak detection and shut-off apparatus
First Claim
1. A leak detection and shut-off apparatus for a liquid container comprising:
- a three layer sensor comprising;
a first layer, non-absorbent and non-conductive in both wet and dry environments, said first layer furthest from said container, thereby keeping moisture from said sensor and preventing false alarms;
a second layer, contacting said container and substantially encompassing same, non-conductive when dry and conductive when in contact with moisture;
a third layer, sandwiched between said first and second layers, said third layer being conductive having a resistance ranging from 0 to 2 megohms, wherein a leak in said container will cause said sensor to produce a signal corresponding to said leak by completing an electrical circuit through said second and third layers.
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Accused Products
Abstract
A leak detection and shut-off apparatus for preventing damage from leaking hot water tanks. The invention features a unique three-layered sensor that completes encases the hot water tank thus detecting the occurrence of leaks anywhere on the tank. Circuitry controls the sensor that provides for accurate detection of even small amounts of moisture so that any potential leak problems can be remedied before a major spill occurs. The device also features a water shut off control mechanism plus audible alarm in the event a leak is detected. The unit is powered by connecting it to 110 house current. A 9 volt battery back-up is provided in case of power failures.
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Citations
9 Claims
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1. A leak detection and shut-off apparatus for a liquid container comprising:
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a three layer sensor comprising; a first layer, non-absorbent and non-conductive in both wet and dry environments, said first layer furthest from said container, thereby keeping moisture from said sensor and preventing false alarms; a second layer, contacting said container and substantially encompassing same, non-conductive when dry and conductive when in contact with moisture; a third layer, sandwiched between said first and second layers, said third layer being conductive having a resistance ranging from 0 to 2 megohms, wherein a leak in said container will cause said sensor to produce a signal corresponding to said leak by completing an electrical circuit through said second and third layers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification