| 摘要 |
PROBLEM TO BE SOLVED: To accurately measure the resistivity of an electrolyte solution, and suppress the increase of a cost needed for work required for measuring the resistivity of the electrolyte solution. SOLUTION: This electrode 1 is provided with an inner electrode 2, an outer electrode 3, a supporting part 4, a seal protrusion 33, a box nut 71 and the like. The inner electrode 2 is formed into an annular tube shape. The supporting part 4 is provided with an outer electrode holder 11 and the like, and supports base end parts 2f, 3b of the electrodes 2, 3. The seal protrusion 33 is projected from the supporting part 11 toward an end face 6d of a tube part 61c. The box nut 71 is provided with a parallel thread 76 screwed into a taper screw 62 of the tube part 61c, and a through hole 75. In the box nut 71, the parallel thread 76 is screwed in to the taper screw 62, and the supporting part 4 inserted into the through hole 75 is pushed toward the end face 61d of the tube part 61c to be attached to the tube part 61c.
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