On Sat, Jan 26, 2013 at 2:12 PM, J. Forster <j...@quikus.com> wrote: > Unless you are doing fundamental physics research, are you sure you need a > cryo temperature standard?
You are right. What I asked I should have said that 1% accuracy would be good enough. I'm pretty sure now that I can get to the 1% level for well under $20. They sell small thin film platinum RTD for about $8. They look like a tiny SMD resistor. I could place a constant current across it and meaure the voltage drop. Dry ice sublimation might be the safest calibration method and close enough for thr 1% goal maybe. Another calibration point might be the boiling point of water. I don't need to design this now, it was an example equestion -- Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.