| 摘要 |
PROBLEM TO BE SOLVED: To provide a sensor capable of accurately evaluating degree of corrosion.SOLUTION: A sensor 10 includes: a crystal plate 11; a first sensor electrode 12a disposed on a first surface of the crystal plate 11; a second sensor electrode 12b disposed on a second surface of the crystal plate 11; a first counter plate 13a being opposite to the first sensor electrode 12a with a space therebetween; a second counter plate 13b being opposite to the second sensor electrode 12b with a space therebetween; and a space adjustment unit 20 for changing the space between the first counter plate 13a and the first sensor electrode 12a and the space between the second counter plate 13b and the second sensor electrode 12b by pressing the first counter plate 13a and the second counter plate 13b toward the crystal plate 11. |
