[time-nuts] temperature sensor

Attila Kinali attila at kinali.ch
Mon Jul 21 04:22:14 EDT 2014


On Sun, 20 Jul 2014 23:18:38 -0700
"Tom Van Baak" <tvb at LeapSecond.com> wrote:

> To satisfy my curiosity and get actual data I'd like to place 6 or more
> tiny analog high-resolution temperature sensors all around the OCXO of a
> Trimble Thunderbolt. That's high-resolution both in temperature and in time.
> In other words, no fake accuracy "averaging" allowed. The goal is to observe
> thermal gradients in real-time and see how good, or how bad, the correlation
> is among crystal temperature, case temperature, and DS1620 temperature
> sensor (which is mounted a considerable distance from the OCXO). The same
> technique, and maybe even the same conclusions, might apply to Rb.

May i ask what speaks about using PT100/PT1000 or NTCs?

NTCs are dirt cheap, but might need some calibration first, to
get to time-nuts standards. But PT100 aren't that much more expensive
either.

eg:
The NTCALUG03 by Vishay don't look too bad, or if you want PT100
the M310 by Heraeus. The KN1510 by Heraeus look also nice, but are
a tad bit more expensive (about 20USD/pcs)


			Attila Kinali

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