Arduino Thermocouple Multiplexer Shield (K - MAX31855K) No Headers
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SKU : KTA-259K
Quantity on Hand : 16
Skill Level : Assembled and Tested

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    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.

    Note: The board ships as pictured, without Arduino headers. You can use standard brea-away headers, or the stackable headers. The board accepts both standard headers and R3 headers.

    • 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