Re: Arduino + MCP9600 + thermocouple help needed

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For US Type K thermocouples, red is (-) and yellow is (+).
https://temp-pro.com/2023/03/27/thermocouple-types-and-color-coding/
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Extension wire is a cheaper version with a limited temperature range
for accuracy. Knowing that got me spools of extension wire for $0.20 /
Lb instead of $1 / foot, and I ran it from the woodstove all through
the house to monitor the fire.

"Compensating cable" - can only handle "room temperatures" but has same
thermo-whatever response to temperature in that range and is much
cheaper than the "real" thermocouple alloy.