| 摘要 |
PROBLEM TO BE SOLVED: To provide a sensor device capable of measuring a concentration change in chloride ion within concrete in a concrete structure while distinguishing the concentration change from a pH change of the concrete, and utilizing information by the measurement in planned maintenance of the concrete structure.SOLUTION: A sensor device 1 of this invention comprises: a first electrode 3 made of a first metallic material; a second electrode 4 separated from the first electrode 3 and made of a second metallic material; a clearance forming body 8 arranged forming a clearance G with part of a surface of the first electrode 3; a clearance filling body 10 for filling the clearance G and configured to be removed by dissolving or decomposing under an environment inside a measuring object; and a function element having a function of measuring electric potential difference between the first electrode 3 and the second electrode 4. A state of a measuring object portion can be measured according to the electric potential difference measured by the function element. |
