| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a capacitance sensor having high detection precision and high sensitivity, irrespective of the size of a detection electrode. SOLUTION: A capacitance sensor 1a is constituted of a capacitance type detection element 1, a circuit board 6 on which a detection circuit is mounted, and a power source part 7. The detection element 2 is constituted of a detection electrode 3, a charged plate 4 and a ground electrode 5. The charged plate 4 is positioned between the detection electrode 3 and the electrode 5. The detection electrode 3, the charged plate 4 and the electrode 5 are arranged in the mutually insulated state, and retained by insulating material (retaining member) in their end portions. The circuit board 6 is arranged on the surface 32 of the detection electrode 3 and insulated from the charged plate 4.</p> |
