I wrote: Breakdown of an inexpensive K-type thermocouple? >
Indeed -- it seems that K-type thermocouples are found to suffer unpredictable degradation in hydrogen atmospheres at temperatures above 900 C: https://www.lenr-forum.com/forum/index.php/Thread/2836-Good-Calorimetry-articles/ Presumably not just inexpensive K-type thermocouples are affected. This post should be required reading for anyone doing or following thermometry experiments. The suggestion is to use N-type or S-type thermocouples instead. But also perhaps another reason to use genuine calorimetry. Eric
