MANY ITEMS AVAILABLE FROM STOCK WITHIN 24 HOURS The products referenced above represent the most popular constructions.
Other constructions can be manufactured
to meet individual specification and application requirements.
Contact factory for additional information.
Table 1 Initial Calibration Tolerances Per ASTM E230 and ANSI
MC96.1
Tolerance-Reference Junction 32F (0C)
Thermocouple Type
Temperature Range F (C)
Grade Designation
Standard Grade
Limits
F (C) whichever is greater
Grade Designation
Special Grade
Limits
F (C) whichever is greater
Thermocouple Wire T
J
E
K or N
T*
E*
K* Extension Wire TX
JX
EX
KX or NX
RX or SX
BX
BX
32 (0) to 700 (370)
32 (0) to 1400 (760)
32 (0) to 1600 (870)
32 (0) to 2300 (1260)
-328 (-200) to 32 (0)
-328 (-200) to 32 (0)
-328 (-200) to 32 (0)
32 (0) to 212 (100)
32 (0) to 400 (200)
32 (0) to 400 (200)
32 (0) to 400 (200)
32 (0) to 400 (200)
32 (0) to 212 (100)
32 (0) to 400 (200)
T
J
E
K or N
T
E
K
TX
JX
EX
KX or NX
RX or SX
BX***
BX ALLOY***
±1.8 (1) or ±0.75%
±4 (2.2) or ±0.75%
±3.1 (1.7) or ±0.50%
±4 (2.2) or ±0.75%
±1.8 (1) or ±1.5%
±3.1 (1.7) or ±1%
±4 (2.2) or ±2%
±1.8 (1)
±4 (2.2)
±3.1 (1.7)
±4 (2.2)
±9 (5)
±7.6 (4.2)
±6.7 (3.7)
TT
JJ
EE
KK or NN
TT
EE
KK
TTX
JJX
EEX
KKX or NNX
±0.9 (0.5) or 0.4%
±2 (1.1) or 0.4%
±1.8 (1) or 0.4%
±2 (1.1) or 0.4%
±0.9 (0.5) or 0.8%**
±1.8 (1) or 0.5%**
**
±0.9 (0.5)
±2 (1.1)
±1.8 (1)
±2 (1.1)
*
**
***
Thermocouple material is normally supplied
to meet tolerances above 0C (32F). If material is required to meet
tolerances below 0C (32F), the purchase order must so state. Special
selection of material is required.
Suggested initial calibration tolerance. Requirements should be
discussed between purchaser and supplier.
Copper vs. copper can be used as an extension for Type B thermocouples
if the transition is below 100C (212F).
Above 100C (212F), PCLW30-6 alloy should be used as the positive
extension wire.