[time-nuts] temperature sensor

EWKehren at aol.com EWKehren at aol.com
Mon Jul 21 09:44:56 EDT 2014

Slow is not a problem in our applications the loop takes care of that. Will 
 look in to PT 100.
Bert Kehren
In a message dated 7/21/2014 8:19:48 A.M. Eastern Daylight Time,  
alexpcs at ieee.org writes:

NTC are  not that very stable, they are amorphous material winch could  
recrystallize slowly and therefore change it's electrical behavior ,  
PT100 style is more reliable since it is pure  metal

On 7/21/2014 1:22 AM, Attila Kinali wrote:
>  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  
>> In other words, no fake accuracy "averaging" allowed. The  goal is to 
>> thermal gradients in real-time and see how  good, or how bad, the 
>> is among crystal temperature,  case temperature, and DS1620 temperature
>> sensor (which is mounted  a considerable distance from the OCXO). The 
>> 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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