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Thermocouple Wire Color Reference Chart Type K, J and N USA and International IEC 584-3
Thermocouple Lead Wire Color Reference Chart Type K, J and N for USA and International IEC 584-3. Click on the title to go to the chart.
|
ANSI |
J |
K |
N |
|
|
Alloy
Combination |
+ Lead
|
IRON
Fe (magnetic) |
NICKEL-CHROMIUM
Ni-Cr |
NICROSIL
Ni-Cr-Si |
|
- Lead
|
CONSTANTAN
COPPER-NICKEL Cu-Ni |
NICKEL-ALUMINUM
Ni-AI (magnetic) |
NISIL
Ni-Si-Mg |
|
|
Color Coding
USA & Canada |
Thermocouple Grade
|
 |
 |
 |
|
Extension Grade
|
 |
 |
 |
|
|
Maximum Useful
Temperature Range ++ |
Thermocouple Grade
|
32 to 1382°F
0 to 750°C |
–328 to 2282°F
–200 to 1250°C |
–450 to 2372°F
–270 to 1300°C |
|
Extension Grade
|
32 to 392°F
0 to 200°C |
32 to 392°F
0 to 200°C |
32 to 392°F
0 to 200°C |
|
|
Maximum Thermocouple Grade
Temperature Range |
–346 to 2193°F
–210 to 1200°C |
–454 to 2501°F
–270 to 1372°C |
–450 to 2372°F
–270 to 1300°C |
|
|
EMF (mV) Over Max.
Temperature Range |
–8.095 to
69.553 |
–6.458 to
54.886 |
–4.345
to 47.513 |
|
|
Standard Limits of Error**
(above O°C) |
greater of
2.2°C or 0.75% |
greater of
2.2°C or 0.75% |
greater of
2.2°C or 0.75% |
|
|
Special Limits of Error**
(above O°C) |
greater of
1.1°C or 0.4% |
greater of
1.1°C or 0.4% |
greater of
1.1°C or 0.4% |
|
|
International IEC 584-3
|
 |
 |
 |
|
|
Comments Environment — Bare Wire
|
Reducing, Vacuum, Inert.
Limited Use in Oxidizing at High Temperatures. Not Recommended for Low Temperatures. |
Clean Oxidizing and Inert.
Limited Use in Vacuum or Reducing. Wide Temperature Range, Most Popular Calibration |
Alternative to Type K.
More Stable at High Temps |
|
++ Except as further restricted by temperature limits for T/C diameter and insulation tables that follow.
* Not official symbol or standard designation.
** For controlled initial accuracy below 0°C, ask sales department
