[time-nuts] What do people use for measuring temperature?

[Bob kb8tq]

Hi

Roughly speaking 99.99999% of all OCXO’s use thermistors as temperature sensors. 
The normal evaluation process on a new one *probably* would catch something < 0.01C
over a few months. You may do it a couple different ways depending on the target
OCXO. The net result is still in the “golly gee wiz low” sort of range. If you can detect a 
drift / shift, you disqualify that part and move on to another one. Very few glass bead 
parts seem to get tossed out …..

Bob



> On Sep 26, 2020, at 4:23 PM, John Ponsonby <jebponsonby at gmail.com> wrote:
> 
> Have any time-nuts got any data on the long term stability or drift rates/ageing characteristics of thermistors? I am concerned with  ability of holding temperature constant at the milliK level for years. I reckon that if one can measure it one can control it. Conversely if one can't measure it, because of the instability of the sensor,  one can't control it.
> John Ponsonby
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