The effects of temperature change on dissimilar metals produces ... talk much about the thermocouples themselves other than the type I see most of the time which is type K. If you’re not already ...
In order to make his thermocouples [Illya] needed to weld the two metals together ... and [Illya] was able to make both K and T-type thermocouples and successfully measure temperatures down ...
Base metal thermocouples can measure different temperature ranges ... Type J (iron/constantan) has a temperature range of -210° C to 1200° C. Type K (chromel/alumel) has a temperature range of -270° C ...