Type S thermocouple
Type S thermocouples are constructed using one wire of 90% Platinum and 10% Rhodium (the positive or "+" wire) and a second wire of 100% platinum (the negative or "-" wire). Like type R, type S thermocouples are used up to 1600°C / 2912°F. In particular, type S is used as the standard of calibration for the melting point of gold (1064.43°C / 1947.98°F).
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