On 3/1/2011 6:42 AM, mike wrote:
Smitty Two wrote:
In article ,
"Ralph Mowery" wrote:

"Smitty Two" wrote in message
news In article ,
mike wrote:

Can't answer your question. But I do know something about
thermocouples.
Those designed to measure air, and surfaces, and liquids, are
different.
Hope you have/use the correct probe for your application.
They are not really that different. They are just made out of two
different kinds of wire/materials and are joined together at the very
end of the probe. The only difference is in the mechanical makeup of
the probe. The very tip where the wires are joined together is the
only point that is being measured.

At work we use hundreds of them, maybe thousands. They are used in
air, nitrogen, direct contact and in other materials. The same ones
are used in all applications that are within the range of the J type
or K type. We use them from about -20 deg C to + 500 deg C.

You can even just take the connecting wire and twist it together and
get a close measurement where they are shorted together. The wire is
usually made out of the same material as in the thermocouple.

The difference in probes for different applications isn't in the
junction, as you note. It's in the way the construction of the probe
ensures the best possible sensing of the test article. A standard
liquid probe taped to a surface will sense 1/2 surface and 1/2 ambient
temp. Not exactly conducive to accuracy.

Great!
Now we have a ****ing contest about how temperature probes work.
The distinction is irrelevant to MY objective.
I need a number, not a lesson on how to measure it.
But do continue ****ing on each other.
I give up!!!

Actually what you have written shows that you do indeed need a lesson on
how to measure temperature.