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

Thermocouples are very sensitive, requiring a good amplifier with a cold-compensation reference. The MAX31855K does everything for you and can be easily interfaced with any microcontroller, even one without an analogue input. This breakout board has the chip itself, a 3.3V regulator with 10uF bypass capacitors, and level shifting circuitry, all assembled and tested. It comes with a 2-pin terminal block for connecting to the thermocouple and a pin header to plug 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 do have an Arduino library for both chips, but you'll need to adjust any existing MAX6675 designs for the MAX31855. The MAX6675 has been discontinued by Maxim.

Version 2.0 now includes ferrite beads and a filter capacitor onboard for better stability. It works with any K-type thermocouple and will not work with any other kind of thermocouple. The output range is -200°C to +1350°C in 0.25 degree increments, with internal temperature reading. It operates on a 3.3 to 5V power supply and is logic level compliant. SPI data output requires any 3 digital I/O pins.