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NEW (UPDATED) PRODUCT – Thermocouple Amplifier MAX31855 breakout board (MAX6675 upgrade)

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NEW (UPDATED) PRODUCT – Thermocouple Amplifier MAX31855 breakout board (MAX6675 upgrade). New! Now uses the MAX31885K instead of the MAX6675, so it can measure a wider temperature measurement range. Please note! the MAX31885 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 mew MAX31855. The MAX6675 has been discontinued by Maxim. 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 analog input. This breakout board has the chip itself, a 3.3V regulator with 10uF bypass capacitors and level shifting circuitry, all assembled and tested. Comes with a 2 pin terminal block (for connecting to the thermocouple) and pin header (to plug into any breadboard or perfboard). Goes great with our 1m K-type thermocouple.

  • Works with any K type thermocouple
  • Will not work with any other kind of thermocouple other than K type
  • -200°C to +1350°C output in 0.25 degree increments
  • Internal temperature reading
  • 3.3 to 5v power supply and logic level compliant!
  • SPI data output requires any 3 digital I/O pins.

Hey we even have a handy tutorial on thermocouples which includes an Arduino library, wiring diagrams and example code. How easy is that?

In stock and shipping now.


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1 Comment

  1. Ah yes, I whipped one of these up months ago for my reflow toaster when no max6675 was forthcoming. This makes my design look rather primitive though. Thank you for the lesson on level shifting! My board used voltage dividers – Primitive! – now i have a new trick! One thing i don’t see on this board are decoupling caps between the TC leads and the power rails… I had read in a few places that even though Maxium claims they aren’t necessary you should decouple your TC inputs. I did, and it works, I guess it would have worked fine without though. Thanks!

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