If you’d like to monitor and control the heating and cooling of a device (fermentation chamber, keggerator, smoker, RIMs, etc), using a K-Type thermocouple, then consider using a MAX31850 Action Board:
This board can monitor a single K-Type Thermocouple and provide control of two Solid State Relays to control heaters, cooling devices, fans, etc. It connects to the TeensyNet™ mini-lan, and is available in the latest version of the TeensyNet™ code available on my github site. It uses Adafruit MAX31850 Breakout Board.
The blank board is available from OSHPark