Thermocouple Accuracies

The accuracy of a thermocouple depends on many factors including but not limited to electrical interference and the purity of the metals used.

THERMOCOUPLE & RTD ACCURACIES
Type K Type J Type T Type E Type N Type S Type R Type B
-328°F * * *
-148°F * * *
32°F ± 3.96°F ± 3.96°F ± 1.8°F ± 3.06°F ± 3.96°F ± 2.7°F ± 2.7°F
392°F ± 3.96°F ± 3.96°F ± 2.7°F ± 3.06°F ± 3.96°F ± 2.7°F ± 2.7°F
752°F ± 5.4°F ± 5.4°F ± 3.6°F ± 5.4°F ± 2.7°F ± 2.7°F
1112°F ± 8.1°F ± 8.1°F ± 5.4°F ± 8.1°F ± 2.7°F ± 2.7°F
1472°F ± 10.8°F ± 7.2°F ± 10.8°F ± 3.6°F ± 3.6°F
1832°F ± 13.5°F ± 13.5°F ± 4.5°F ± 4.5°F ± 9°F
2192°F ± 16.2°F ± 16.2°F ± 5.4°F ± 5.4°F ± 10.8°F
2552°F ± 6.3°F ± 6.3°F ± 12.6°F
2912°F ± 14.4°F
Note: The accuracies in the above table are estimates given at fixed points, they do not apply to temperature ranges and are intended only as examples to give a general idea of what can be expected. Consult Reotemp if a specific accuracy is required or to confirm accuracies at any points not listed in the above table.
*Thermocouples are normally supplied to meet the tolerances specified in the table for temperatures above 32°F. The same materials, however, may not fall within the tolerances for temperatures below 32°F. If materials are required to meet the tolerances stated for temperatures below 32°F, contact Reotemp sales.
Thermocouple Conductor Type Limits of Error (Whichever is Greater)
Standard Special
 Type K ±2.2°C or ±0.75% ±1.1°C or ±0.4%
 Type T ±1.0°C or ±0.75% ±0.5°C or ±0.4%
Type J ±2.2°C or ±0.75% ±1.1°C or ±0.4%
Type N ±2.2°C or ±0.75% ±1.1°C or ±0.4%
Type E ±1.7°C or ±0.5% ±1.0°C or ±0.4%
Type S ±1.5°C or ±0.25% ±0.6°C or ±0.1%
Type R ±1.5°C or ±0.25% ±0.6°C or ±0.1%
Type B ±0.5% ±0.25%

 

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