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US 7,213,534 B2Granted
Device and method for detection/indication of liquid leakage
AssigneeTom Invent AB
InventorTimo Siikaluoma
Life of this patent
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Abstract
An improved device for the detection of leakage is achieved when the device includes at least two components, of which at least one is capable of migrating with the liquid within the carrier, and forming a distinct color or other detectable signal with the first component. Such device is not sensitive to normal, ambient humidity and the color signal formed is resistant to being diluted or rinsed away in cases of abundant or repeated leakage.
Claims8
A nontoxic device for detecting leakage of a liquid, comprising:
- a carrier permeable to the liquid;
- at least two components that are soluble in the liquid, the components or parts thereof forming a colored complex, which color is not significantly altered or removed by a surplus of the liquid,
- wherein said at least two components comprise a first component which is immobilised to the carrier and a second component that migrates within the carrier when the carrier is wetted by the liquid, the colored complex being immobilised to the carrier,
- wherein the first component comprises iron phosphate (FePO4.2H2O) and the second component comprises potassium ferrocyanate (K4Fe(CN)6.3H2O).
1 more element
A non-toxic method for detecting leakage of a liquid, comprising the steps of:
- providing a carrier permeable to the liquid, the carrier comprising at least two components, the components or parts thereof forming a colored complex, which color is not significantly diluted or removed by a surplus of the liquid;
- affixing the carrier to a location where leakage can be expected;
- and
- observing the carrier for color changes,
- wherein said at least two components comprise a first component which is immobilised to the carrier and a second component that migrates within the carrier when the carrier is wetted by said liquid, the colored complex being immobilised to the carrier,
- wherein the first component comprises iron phosphate (FePO4.2H2O) and the second component comprises potassium ferrocyanate (K4Fe(CN)6.3H2O).
3 more elements
Dependencies are inferred from the claim text.