[time-nuts] quartz thermometers
Alan Ambrose
alan.ambrose at anagram.net
Fri Mar 11 17:41:43 UTC 2016
Hi,
I hope this is still relevant and not too off-topic...but since it involves crystals and tempco...
Quartz thermometers (e.g. the HP 2804A) with their 'linear cut' crystals and '0.0001C resolution' seem to have been a thing from the mid-60's to the mid-80's:
http://www.hparchive.com/Journals/HPJ-1965-03.pdf
There still appear to be some manufacturers making the crystals:
http://www.statek.com/products/pdf/Temp%20Sensor%2010162%20Rev%20B.pdf
Anyone know why they died out? Did a better technology replace them?
TIA, Alan
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