| 摘要 |
PROBLEM TO BE SOLVED: To provide the subject composite sensor capable of miniaturizing an apparatus while simplifying a measuring circuit by making a reference electrode common and exerting no effect on a measured value even if a stray current is generated when a current is allowed to flow through the water in an electrolytic cell, preventing the generation of bacteria and the formation of slime or the generation of scale on the surface of an electrode at a time of the stagnation of water to be measured and capable of detecting the deterioration of the electrode. SOLUTION: The composite sensor for measuring the concentration and pH of hypochlorous acid is equipped with a measuring cell 7 arranged in a flow channel of a liquid to be measured, the acting electrode 1 for measuring the concentration of hypochlorous acid provided in the measuring cell 7, the counter electrode 3 of the acting electrode 1 provided in the measuring cell 7, the pH measuring hydrogen ion sensitive electrode 2 provided in the measuring cell 7 and the reference electrode 4 common to the acting electrode 1 and the hydrogen ion sensitive electrode 2 provided in the measuring cell 7. |
