| 摘要 |
PROBLEM TO BE SOLVED: To provide a pH sensor capable of regularly keeping the sensor performance even in the intermittent measurement of pH of a measuring solution and shortening the stabilization time of the sensor in the restart of measurement, so that the pH measurement work of the measuring solution can be continuously and efficiently performed. SOLUTION: In this integrated pH sensor 10, respective end parts of the liquid junction 16 of a reference electrode part and the pH sensitive glass 15 of a glass electrode part 13 are arranged so as to protrude down into a cell 11 to which the measuring solution is supplied. In this pH sensor, an interrupting member for arresting the movement of a reference electrode-side inner solution 18 leaked from the liquid junction 16 to the pH sensitive glass 15 in the discharge of the measuring solution from the cell, or an interrupting structure formed by varying the direction or position of the cell inside surface of each support part is provided between a support part 17 for supporting the circumference of the liquid junction 16 arranged protrusively into the cell 11 and a support member 14 for supporting the body circumference of the glass electrode part 13. |
