California Fine Wire CompanyThermocouple Wire CapabilitiesCalifornia Fine Wire Company
Type Description Maximum Operating Temperature ºF Range EMF Over Limits of Errror Standard Limits of error Special
J Iron/Constantan TC Grade 0 2.2/ ºC 1.1/ ºC
    32-1382 to or or
    Extension grade 42.283 0.75% 0.40%
    32-392      
K Chromel/Alumel TC Grade -5.973 2.2/ ºC 1.1/ ºC
  (+) (-) -328 to 2282 to or or
    Extension grade 50.663 .75% above 0ºC 0.40%
    32 to 392   2.2/ ºC  
        or  
        2% below 0 ºC  
T Copper/Constantan TC Grade -5.603 1.0/ ºC 0.5/ ºC
  (+) (-) -328 to 662 to or or
    Extension grade 17.816 .75% above 0ºC 0.40%
    -76 to 212   1.0/ ºC  
        or  
        1.5% below 0ºC  
E Chromel/Constantan TC Grade -8.824 1.7/ ºC 1.0/ ºC
  (+) (-) -328 to 1652 to or or
    Extension grade 68.783 .75% above 0ºC 0.40%
    32 to 392   1.7/ ºC  
        or  
        1.0% below ºC  
R Platinum 13% Rhodium(+) TC Grade 0 1.5/ ºC 0.6/ ºC
  / 32 to 2642 to or or
  Platinum(-) Extension grade 16.741 0.25% 0.10%
    32 to 300      
S Platinum 10% Rhodium(+) TC Grade 0 1.5/ ºC 0.6/ ºC
  / 32 to 2642 to or or
  Platinum(-) Extension grade 14.973 0.25% 0.10%
    32 to 300      
B Platinum 30% Rhodium(+) TC Grade 0 0.50% Unknown
  / 32 to 3092 to over  
  Platinum 6% Rhodium(-) Extension grade 12.426 800ºC  
    32 to 300      
  Tungsten(+) TC Grade 0 4.5ºC to 425ºC Not
  / 32 to 4208 to or Established
  Tungsten 26% Rhenium(-) Extension grade 38.564 1.0% to 2320ºC  
    32 to 500      
  Tungsten 5% Rhenium(+) TC Grade 0 4.5ºC to 425ºC Not
  / 32 to 4208 to or Established
  Tungsten 26% Rhenium(-) Extension grade 37.066 1.0% to 2320ºC  
    32 to 1600      
  Tungsten 3% Rhenium(+) TC Grade 0 4.5ºC to 425ºC Not
  / 32 to 4208 to or Established
  Tungsten 25% Rhenium(-) Extension grade 39.506 1.0% to 2320ºC  
    32 to 500