| 摘要 |
PROBLEM TO BE SOLVED: To provide a sensor probe for measuring amount of dissolved hydrogen in a melted metal with a lid member where jamming is suppressed while preventing the contact between the melted metal and a sensor. SOLUTION: A sensor probe is provided with a support with an internal space that is opened to an end face where a melted metal contacts, a breathing lid member that closes the opening of the support and prevent the contacting melted metal from entering the internal space, and a sensor for generating a potential based on a hydrogen gas partial in a measurement hydrogen gas room 61, a hydrogen gas partial pressure and a hydrogen gas partial pressure difference in the reference hydrogen gas room 62 while the internal space is separated into the measurement hydrogen gas room 61 at the side of the lid member and the reference hydrogen gas room 62. In this case, the support also has a gas-introducing path 5 for introducing a gas into the measurement hydrogen gas room. |
