Liquid leakage detector line
First Claim
1. A liquid leakage detector line provided with a coating layer disposed at the outer periphery of a core, the core containing a pair of wiry electrodes having an extrusion coating disposed nearly parallel with each other, characterized in that said wiry electrodes are formed with conductors which have the extrusion coating of a thermoplastic polyester elastomer thereon as the insulator thereof, and in that the coating layer possesses waterproof and liquid-absorbent properties.
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Accused Products
Abstract
A liquid leakage detector line is provided with a coating layer having at least liquid-absorbent properties and disposed at the outer periphery of a core which contains a pair of wiry electrodes disposed nearly parallel with each other, wherein the wiry electrodes comprise conductors which are extrusion coated with a polyester elastomer as an insulator. The liquid leakage detector line has excellent mechanical strength, rubber elasticity, resistance to fatigue from flexing and crack propagation resistance, and is free from the occurrence of pinholes, crazings, etc. inside the insulator during production and laying due to external forces applied to the wiry electrodes, such as pressure, tensile force, bending, and the like. As a result, erroneous actuation due to rainfall, etc. does not occur, and the time required to detect the sulfuric acid or other liquid to be detected has little dependence on the temperature, and short detection times for leaking liquid are possible even at low temperatures.
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Citations
18 Claims
- 1. A liquid leakage detector line provided with a coating layer disposed at the outer periphery of a core, the core containing a pair of wiry electrodes having an extrusion coating disposed nearly parallel with each other, characterized in that said wiry electrodes are formed with conductors which have the extrusion coating of a thermoplastic polyester elastomer thereon as the insulator thereof, and in that the coating layer possesses waterproof and liquid-absorbent properties.
- 4. A liquid leakage detector line provided with successive coatings of an inner layer and an outer layer around the outer periphery of a core, the core containing a pair of wiry electrodes having an extrusion coating disposed nearly parallel with each other, characterized in that the wiry electrodes are formed with conductors which have the extrusion coating of a thermoplastic polyester elastomer thereon as the insulator thereof, and in that the outer layer possesses waterproof and liquid-absorbent properties.
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10. A liquid leakage detector line, comprising:
- a pair of wiry electrodes having a flexible conductor with an extrusion coating of a thermoplastic polyester elastomer, an outer-layer coating possessing at least liquid-absorbent properties around a core which contains the pair of wiry electrodes, and a series of impedance elements each connected at a certain specified length to one of the wiry electrodes.
- View Dependent Claims (11, 12)
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13. A liquid leakage detector line, comprising:
- a pair of wiry electrodes having a flexible conductor with an extrusion coating of a thermoplastic polyester elastomer, a coating layer possessing at least liquid-absorbent properties around a core which contains the pair of wiry electrodes, and constant current circuits which cause a specified current to flow in the same direction from one wiry electrode to the other wiry electrode, each respectively connected in a parallel manner at a certain specified length to the wiry electrodes.
- View Dependent Claims (14, 15, 16, 17, 18)
Specification