Type K

Type K Thermocouple

Type K Thermocouple
Data and Polynomial


  • Description
    Ni-Cr / Ni-Al
  • Data source
    National Institute of Science and Technology (NIST)
  • Raw Data
  • Octave format
  • Curve fit
    • mV -> temperature (C)
      e is maximum error (in degrees C)
      v1 andf v2 partition the domain into three segments, each with a polynomial fit
      c is vector of coefficients: a10, a9, ... a0
      Note: Each column of c corresponds to one range (<v1,v1 to v2, >v2)

      e = 0.34668

      v1 = 11.176

      v2 = 22.691

      c =



         -2.4608e-07   -2.1453e-09   
      1.2296e-13

          6.8153e-06    3.3858e-07  
      -4.9588e-11

         -4.2163e-05   -2.3642e-05   
      8.7399e-09

         -3.2201e-04    9.5925e-04  
      -8.9155e-07

          3.5591e-03   -2.4958e-02   
      5.8569e-05

          2.8323e-03    4.3295e-01  
      -2.5980e-03

         -9.0658e-02   -5.0349e+00   
      7.8935e-02

          1.2429e-01    3.8316e+01  
      -1.6195e+00

          1.9257e-01   -1.7907e+02   
      2.1387e+01

          2.4940e+01    4.7066e+02  
      -1.3999e+02

         -7.2259e-01   -4.0375e+02  
      5.6264e+02

      type_k mV->C
    • temperature -> mV (range -127C-127C)
      e is maximum error (in mV)
      c is vector of coefficients: a10, a9, ... a0

      e = 0.00067432

      c =

         -6.7683e-23

          4.5979e-21

          3.0278e-18

         -1.8030e-16

         -5.0020e-14

          2.5828e-12

          3.6705e-10

         -1.3166e-07

          2.6120e-05

          3.9443e-02

         -1.6551e-04

      type_k temperature->mV curve fit


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