I'm planning to build a temperature controller based on Arduino. I want it for, in conjunction with a k thermocouple, regulating the heat produced by a heating element, in situations from 100ºC to 900°C.
Plenty of moving parts there, I know. But at this momment I have just one specific question. Is there a performance difference, in the sense of accuracy of temperature readings, between Max6675 and Max31855 thermocouple modules?