| 摘要 |
PURPOSE:To provide a sensor probe and a hydrogen-concentration measuring method, which prevent the reduction of solid electrolyte constituting a sensor element, can measure the concentration of hydrogen in molten metal in a high accuracy without directly dipping the sensor element into molten metal, can measure the concentration of the hydrogen for a long time, and can achieve the compact configuration. CONSTITUTION:A reference pole 2 comprising a porous electrode is formed at the outer surface of a one-end blocked type sensor element 1 comprising perovskite-type proton conductive solid electrolyte. A measuring pole 3 comprising a porous electrode is formed at the inner surface of the sensor element 1. The reference pole 2 and the measuring pole 3 are separated with a sealing material 7. A sleeve 8 made of ceramics receives the sensor element 1. The lower part of the sensor element 1 is dipped into molten metal, and a space in contact with the molten metal is enclosed in the sensor element 1. |
