Response to the comment on the article “New solid-state electrochemical method of measuring dissolved hydrogen in Al melt” by S.G. Kim, B.H. Jung, C.O. Park, R.A. Rapp

Our publication by Kim et al. [7] is not purposed to criticize others but we try to deliver the problems that the current sensor has. In fact, I think that we have studied all types of sensor structure for Al melt since 2002 and experienced many problems mentioned in the paper. I hope that this discussion will be a good chance to widen the technical understanding in proton conductor type hydrogen sensor, which leads to a completeness of sensor performance.