| 摘要 |
PURPOSE:To selectively and certainly detect the leakage of strong acidic or strong alkaline corrosive liquid, by parallelly arranging a plurality of conductors in an insulating support and constituting said insulating support of a polymer material deteriorated by the corrosive liquid. CONSTITUTION:Conductors 11a, 11b are parallelly arranged in an insulating support 12 so as to be spaced apart from each other. The insulating support 12 is constituted of a polymer material deteriorated by a corrosive liquid. A large number of holes 13 are opened to the surface part of the insulating support 12 of the conductors 11a, 11b in two rows so as to allow the corrosive liquid to arrive said holes 13. The corrosive liquid is stagnated in the holes 13 and the insulating support 12 is deteriorated to generate the change in dielectric constant and the electric characteristic such as impedance between the conductors 11a, 11b also changes. Then, the change in this electric characteristic is detected to detect the leakage of the corrosive liquid. As the polymer material, foamed polyurethane is used. Because the polymer material deteriorated by the corrosive liquid is used, the leakage of the acidic or alkaline corrosive liquid can be certainly detected. |
