Thermocouple - Thermocouple Comparison

Thermocouple Comparison

The table below describes properties of several different thermocouple types. Within the tolerance columns, T represents the temperature of the hot junction, in degrees Celsius. For example, a thermocouple with a tolerance of ±0.0025×T would have a tolerance of ±2.5 °C at 1000 °C.

Type Temperature range °C (continuous) Temperature range °C (short term) Tolerance class one (°C) Tolerance class two (°C) IEC Color code BS Color code ANSI Color code
K 0 to +1100 −180 to +1300 ±1.5 between −40 °C and 375 °C
±0.004×T between 375 °C and 1000 °C
±2.5 between −40 °C and 333 °C
±0.0075×T between 333 °C and 1200 °C
J 0 to +750 −180 to +800 ±1.5 between −40 °C and 375 °C
±0.004×T between 375 °C and 750 °C
±2.5 between −40 °C and 333 °C
±0.0075×T between 333 °C and 750 °C
N 0 to +1100 −270 to +1300 ±1.5 between −40 °C and 375 °C
±0.004×T between 375 °C and 1000 °C
±2.5 between −40 °C and 333 °C
±0.0075×T between 333 °C and 1200 °C
R 0 to +1600 −50 to +1700 ±1.0 between 0 °C and 1100 °C
± between 1100 °C and 1600 °C
±1.5 between 0 °C and 600 °C
±0.0025×T between 600 °C and 1600 °C
Not defined.
S 0 to 1600 −50 to +1750 ±1.0 between 0 °C and 1100 °C
± between 1100 °C and 1600 °C
±1.5 between 0 °C and 600 °C
±0.0025×T between 600 °C and 1600 °C
Not defined.
B +200 to +1700 0 to +1820 Not Available ±0.0025×T between 600 °C and 1700 °C No standard use copper wire No standard use copper wire Not defined.
T −185 to +300 −250 to +400 ±0.5 between −40 °C and 125 °C
±0.004×T between 125 °C and 350 °C
±1.0 between −40 °C and 133 °C
±0.0075×T between 133 °C and 350 °C
E 0 to +800 −40 to +900 ±1.5 between −40 °C and 375 °C
±0.004×T between 375 °C and 800 °C
±2.5 between −40 °C and 333 °C
±0.0075×T between 333 °C and 900 °C
Chromel/AuFe −272 to +300 n/a Reproducibility 0.2% of the voltage; each sensor needs individual calibration.

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