Arduino Thermocouple Multiplexer Shield (K - MAX31855K) (With Headers)
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Skill Level : Assembled and Tested

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Also available without Headers. Click here to order without headers

Note: This version comes with headers pre-soldered to the board. Please allow 24 hours for shipment.

Description: The KTA-259v5 Thermocouple Multiplexer Shield is designed to easily allow multiple high temperature readings with an Arduino control board. With the new version there are multiple advantages over the old KTA-259, namely, wider temperature range including below 0°C, higher accuracy, higher resolution and ability to use more thermocouple types (dependent on model).

Screw terminals are provided for thermocouple connections as thermocouple wires can not be soldered.
  • Automotive – Engine, Exhaust and Brake temperatures are higher than most temperature sensors can handle, but within the range of Thermocouples.
  • Ovens, Furnaces and Kilns – At temperatures where other temperature sensors will not operate.
  • Freezer or Cryogenic monitoring – Where temperatures are well below 0°C.
  • Chemical Processes – Where corrosive chemicals may damage probes or reach high temperatures thermocouples are more readily available for such processes.
  • Multi-Zone Temperature Monitoring, Data Acquisition or Logging Systems– With cheap readily available thermocouples.
Additional Details:
SKU / Part NumberThermocouple TypeICMeasured Temperature RangeThermocouple Maximum Temperature Range [1]
KTA-259KKMAX31855K-200°C to +1350°C-270°C to +1372°C
KTA-259JJMAX31855J-40°C to +750°C-210°C to +1200°C
KTA-259NNMAX31855N-200°C to +1300°C-270°C to +1300°C
KTA-259SSMAX31855S+50°C to +1600°C+50°C to +1768°C
KTA-259TTMAX31855T-250°C to +400°C-270°C to +400°C
KTA-259EEMAX31855E-40°C to +900°C-270°C to +1000°C
KTA-259RRMAX31855R-50°C to +1770°C-50°C to +1768°C
KTA-259[2]KMAX66750 to +1024°C-270°C to +1372°C
KTB-259[2]KMAX66740 to +128°C-270°C to +1372°C
[1] This is the range of temperatures that a thermocouple of this type can measure, the Measured Temperature Range is the actual range the KTA-259 can digitize.

[2] KTA-259 and KTB-259 are discontinued and are included for reference only.

  • Add up to 8 Thermocouples to an Arduino
  • Cold Junction Compensated Output
  • K, J, N, S, T, E or R Type thermocouples supported dependent on model
  • 0.1” (2.54mm) Pitch Screw Terminals for Thermocouple connection
  • 14-bit 0.25°C Resolution
  • Nominal ±2°C accuracy[1]
  • Based on MAX31855 Cold-Junction Compensated Thermocouple-to-Digital Converter and ADG608 Multiplexer IC
  • 13 x 8 Prototyping Area with Analog and Power pins
  • Chip Select Pin Jumper Selectable means multi SPI shield compatibility
  • Combine with SD card shield for powerful Temperature Logging
  • Powered from 3.3V Arduino Pin, 5V compatible
  • Selection Guide:

Documentation and Downloads