It is a reasonable bet that the thermalization time of their sensor is in the neighborhood of 100ms or so (which is very fast). The thing that is really good/i

It is a reasonable bet that the thermalization time of their sensor is in the neighborhood of 100ms or so (which is very fast). The thing that is really good/interesting is the 60 nK/rtHz sensitivity at those frequencies. Off the top of my head, I believe that the best thermistor-based systems I've built have been in the 10-100 uK/rtHz realm. It is interesting to ponder whether such extreme sensitivity for a small object might open up some new avenues in fundamental physics. Things related to temperature are generally hard, but every time a new technique emerges, it is worth looking around to see if any new doors have opened.