The error of an ``immersed'' thermocouple due to heat leaks through the thermocouple wires has been estimated by means of a simple model. The error is shown to decrease exponentially with quantity L1/l1, where L1 is the ``immersion'' depth of the thermocouple and l1 is a characteristic length depending on thermocouple parameters and the mode of heat transfer. It is shown that large errors generally arise if such a thermocouple is used in vacuum. Calculations for specific cases are given.

Topics
Thermoelectricity, Thermodynamic states and processes
1.
R. A.
Horne
,
Rev. Sci. Instr.
31
,
459
(
1960
).
Google Scholar
Crossref
Search ADS
 
2.
The heat transfer coefficient is denned as the rate of surface heat flow per unit area per unit temperature difference.
3.
In all expressions in this paper involving radiation effects, the T’s refer to absolute temperatures.
This content is only available via PDF.
© 1961 The American Institute of Physics.
1961
The American Institute of Physics
You do not currently have access to this content.