Adafruit ad8495 analogue output k type thermocouple amplifier breakout adafruit 269 the adafruit max31855k thermocouple amplifier offers a quick and easy way of hooking up a thermocouple to your next microcontroller project thermocouples need a cold compensation reference and a good amplifier which is where the max31855k chip comes in it handles all the electrical complications and provides you with an spi channel you can interrogate as needed this board has been improved over time and now