The Use of Difference Thermocouples in Cryogenic Systems
Thermocouple circuits [1,2] vary widely, depending on their particular application. The circuit most commonly used for multiple thermocouple applications, as shown in Fig. 1, incorporates a single reference junction located outside of the process column. This conventional design approach will be compared with a “difference thermocouple” technique in this presentation, and a laboratory test using this improved system for cryogenic measurement will be described.
KeywordsLead Wire Normal bOiling Point Cryogenic System Liquid Nitrogen Storage Reference Junction
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