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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Chromel/AuFe | −272 to +300 | n/a | Reproducibility 0.2% of the voltage; each sensor needs individual calibration. | ||||
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