Type J Thermocouple: Range, Wire Colors & When to Use vs Type K
Type J thermocouple — iron-constantan, -40 to 750°C, ideal for reducing atmospheres. Wire color codes, IEC 60584 accuracy, vs Type K & Type N selection.
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Grounded vs Ungrounded Thermocouple: 2×3 Selection Matrix
Grounded, ungrounded, or exposed thermocouple junction? Real τ63 numbers, Class I/II tolerances, and 2×3 selection matrix with Sinopec, Baosteel, CATL cases.
