The SparkFun MAX31855K Thermocouple Breakout is a highly efficient, SPI-compatible, serial interface thermocouple digitizer that allows for precise temperature readings. Its 14-bit resolution enables it to interpret a wide range of temperatures. The device operates by creating a temperature gradient between two wires of different metals. This generates a voltage potential, allowing current to flow. The Thermocouple Breakout interprets this data and translates it into readable form with the help of a standard Type-K thermocouple.Through the SparkFun Thermocouple Breakout, you can read temperatures ranging from -200°C to +700°C at the thermocouple's hot junction, with an accuracy of ±2°C. The cold junction, located inside the MAX31855K, offers a range from -20°C to +85°C, also maintaining ±2°C accuracy. The device continuously measures the temperature of the cold junction with an internal temperature-sensing diode. It requires a power source from +3.0V to +3.6V (+3.0V nominal) and draws a maximum of 1.5mA.The Thermocouple Breakout is designed to accommodate a standard thermocouple connector, offering convenience and compatibility with probes you may already possess. Alternatively, you can solder a thermocouple directly into the through-holes labeled '+' and '-'. If you choose this option, it is recommended to mount the thermocouple for strain relief to prevent wire breakage. Notches for a zip-tie or wire wrapping are provided in the PCB opposite the header for this purpose.Key Features: * 14-bit Resolution * SPI-Compatible, Serial Interface * -200°C to +700°C Temperature Reading with ±2°C Accuracy * 3.0V to 3.6V (+3.0V nominal) Power Requirement * Compatible with Type-K Thermocouple Supporting Documents: * Schematic * Eagle Files * Hookup Guide * Datasheet (MAX31855K) * GitHub (Design Files) * GitHub (Library & Example Code) https://elecena.pl/product/27745956/sparkfun-thermocouple-breakout-max31855k 2025-01-23 https://elecena.pl/product/27745956/sparkfun-thermocouple-breakout-max31855k 2025-03-23 https://elecena.pl/product/27745956/sparkfun-thermocouple-breakout-max31855k 2025-09-27 https://elecena.pl/product/27745956/sparkfun-thermocouple-breakout-max31855k 2025-10-11 https://elecena.pl/product/27745956/sparkfun-thermocouple-breakout-max31855k 2025-10-17 https://elecena.pl/product/27745956/sparkfun-thermocouple-breakout-max31855k 2025-10-24 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