SparkFun Thermocouple Breakout - MAX31855K

SKU: SEN-13266 Brand: Sparkfun

The SparkFun MAX31855K Thermocouple Breakout is a simple 14-bit resolution, SPI-compatible, serial interface thermocouple digitizer that makes reading a wide range of temperatures possible. A thermocouple works by taking two wires made of dissimilar metals, connecting them at the two ends, and making a temperature gradient between one end and the other (a ‘hot’ end and a ‘cold’ one). Once this is achieved, a voltage potential is formed and current flows. The SparkFun Thermocouple Breakout takes a standard Type-K thermocouple in one end, digitizes the temperature measured and sends that data out the other end via a SPI interface, thereby interpreting the data and translating it for you to read!

$31.75 AUD, inc GST

$28.86 AUD, exc GST

Available with a lead time
Expect dispatch between May 01 and May 06

Quantity Discounts:

10-25 $28.00 (exc GST)
25+ $27.42 (exc GST)

With the SparkFun Thermocouple Breakout, the thermocouple’s hot junction can be read from -200°C to 700°C with an accuracy of ±2°C while the cold junction, inside the MAX31855K, can only range from -20°C to 85°C while maintaining ±2°C accuracy. The MAX31855K constantly measures the temperature of the cold junction using an internal temperature-sensing diode. The MAX31855K requires a power source from 3.0V to 3.6V ( 3.0V nominal) and only draws 1.5mA maximum.

The Thermocouple Breakout is designed to accept a standardthermocouple connector, for convenience and compatibility with probes you may already own. These connectors aren’t necessary, and you could solder a thermocouple directly into the through holes labeled ‘ ’ and ‘-’. If you decide to solder the thermocouple directly to the breakout board, it is recommended that the thermocouple be mounted for strain relief to avoid breaking the thin wires. Notches for a zip-tie or wire wrapping have been provided in the PCB opposite the header for this purpose.

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) Required
Accepts Type-K Thermocouple

Documents:

Schematic
Eagle Files
Hookup Guide
Datasheet (MAX31855K)
GitHub (Design Files)
GitHub (Library & Example Code)

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