Hi Platinum RTD's are a pretty good bet for -80C, they hold up well down there. For calibration, ammonia and acetylene both have triple points in the vicinity. I'd probably try ammonia first, but not for any good reason. Triple point cells aren't all that hard to make. Never tried it with something flammable ...
Bob On Jan 26, 2013, at 12:32 AM, Chris Albertson <[email protected]> wrote: > This is by definition Off Topic > > I'm looking for a forum where people are about as technically > competent as here but where an amateur scientist can ask questions > like > > 1) What is a cost effective way to measure temperatures at around -80C > (about the temperature of dry ice) Thermocouples, NTC thermisters? > 2) Is brand X microscope as good as brand Y, they look identical to me. > > All I'm finding is either places that cover "science news" or some > forum filled with nonsense about cloning dinosaurs and time travel. > > -- > > Chris Albertson > Redondo Beach, California > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
