I am using the arduino uno rev.3
This is the Max31855 (by maxim)
https://uk.rs-online.com/web/p/sensor-development-tools/1914223/ (UK Link)
https://de.rs-online.com/web/p/entwicklungstools-sensorik/1914223/ (German Link)
But its only a ma31855, maybe its not suited for the k thermocouples