Adafruit Thermocouple Amplifier MAX31855 breakout board (MAX6675 upgrade) - v2.0

Thermocouples are very sensitive and require a good amplifier with a cold compensation reference. The MAX31855K takes care of everything for you and can be easily connected to any microcontroller, even one without analog inputs. This breakout board includes the chip itself, a 3.3V regulator with 10uF decoupling capacitors, and a level shifting circuit, all assembled and tested. It comes with a 2-pin terminal block for connecting to the thermocouple and a pin header that can be plugged into any breadboard or perfboard. It pairs well with our 1m K-type thermocouple.

New! Now uses the MAX31855K instead of the MAX6675, allowing for a wider temperature measurement range. Please note that the MAX31855 is not pin-compatible or drop-in code-compatible with the MAX6675. We have an Arduino library for both chips, but you will need to adapt existing MAX6675 designs for the MAX31855. The MAX6675 has been discontinued by Maxim.

Version 2.0 now includes ferrite beads and an onboard filter capacitor for better stability. It works with any K-type thermocouple and not with other types of thermocouples. The output range is from -200°C to +1350°C in 0.25-degree steps, with internal temperature measurement. It operates with a power supply of 3.3 to 5V and is logic compatible. The SPI data output requires 3 digital I/O pins.