Sensor professional for hydrogen melting quantitative measurement in melted metal - bu and its use method

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 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 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 ceramic holder 8 receives the sensor element 1. The inside of the holder is filled with a solid reference material 11. A ceramic insulating pipe 4 is inserted into the upper part of the holder 8 and fixed. Then, 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.;COPYRIGHT: (C)1995,JPO