Transcription of Thermocouple Theory - Pyromation
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Thermocouple Theory - Pyromation
Thermocouple Theory Page 1 WHAT IS A Thermocouple ? In 1821, Thomas Seebeck discovered if metals of two different materials were joined at both ends and one end was at a different temperature than the other, a current was created. This phenomenon is known as the Seebeck effect and is the basis for all thermocouples. T1 T2 A Thermocouple is a type of temperature sensor, which is made by joining two dissimilar metals at one end. The joined end is referred to as the HOT JUNCTION. The other end of these dissimilar metals is referred to as the COLD END or COLD JUNCTION.
THERMOCOUPLE THEORY Page 4 Type K: The Type K thermocouple has a Chromel positive leg and an Alumel (Nickel- 5% Aluminum and Silicon) negative leg. Type K is recommended for use in oxidizing and completely inert environments. Because it’s oxidation resistance is better than Types E, J, and T they find widest use at temperatures above 1000 F.
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