On Sat, 29 Apr 2017 08:24:04 -0500, dpb wrote:

On 04/29/2017 6:21 AM, Jim Wilkins wrote:
...

I just remembered the words to search for.
http://www.sensata.com/klixon/thermostat-hvac-20600.htm

Interesting...the interesting group from the spec table.

Highest Standard
Temperature Nominal Tolerances
Setting Differential Open Close
oF oF oF
-10 to 80 10 to 14* ±5 ±5
15 to 29 ±6 ±6
30 to 59 ±6 ±7
60 to 150 ±7 ±8

*Available in SPST construction only.

The biggest downside would appear that the only distributor I could find
that even listed a price quotes $250/ea; the rest are "Quote". One
knows when in that ballgame the answer is never going to be one one
wants...

I've purchased small qtys from Grainger in the past, not sure what
they stock these days. I don't think they we're more than $10 to $15.

I recently purchased a selection on ebay from China to build a Murphy
switch for my tractor for unattended running of a PTO generator. It's
a '54 Farmall with thermo-syphon cooling system -- no water pump or
ports for a sensor, so I hope to find a place where a contact switch
will work.

I can't vouch for the calibration accuracy, but they're cheap enough
to experiment with.
http://www.ebay.com/sch/i.html?_from...SD301&_sacat=0

--
Ned Simmons