| 摘要 |
A liquid leakage sensor is used for a leakage detection system. The liquid leakage senor includes an electrically insulating linear core member, and a pair of conductive wires individually helically wound on the surface of the core member. The conductive wires are arranged on the surface of the core member separate from each other. The conductive wires function as an electrode of the liquid leakage sensor. At the time when the liquid leakage sensor detects no liquid, the conductive wires are electrically insulated from each other on the surface of the core member. The liquid leakage sensor senses the existence of liquid by detecting an electric current flowing in both the conductive wires via the liquid when the conductive wires are electrically bridged while the liquid is being interposed between both of the conductive wires. |
