| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a water level sensor capable of preventing false detection to enhance detection accuracy. <P>SOLUTION: A substrate 101 of the water level sensor 100 is made from ceramics and the like and a sensing electrode 105 and a reference electrode 106 are formed on the surface 101a of substrate 101. The surface of each electrode part is gilded with gold. Domains except those of the sensing electrode 105 and the reference electrode 106 on the surface 101a of substrate 101 are finished by water repellent film 109. The sensing electrode 105 and the reference electrode 106 are separated through the water repellent film 109. Thereby, the sensing electrode 105 and the reference electrode 106 are linked by remaining liquid to turn on electricity, resulting in possible prevention of false detection. <P>COPYRIGHT: (C)2007,JPO&INPIT |
