1. Thermocouple level (high temperature level). This type of thermocouple wire is mainly suitable for thermocouple type K, J, E, T, N and L and other high temperature detection instrument, temperature sensor, etc.
2. Compensating wire level (low temperature level). This type of thermocouple wire is mainly suitable for compensating cable and extension wire of various thermocouples of type S, R, B, K, E, J, T, N and L, heating cable, control cable and so on.
Thermocouple variety and index
Thermocouple Variety and Index |
Variety | Type | Measurement Range(°C) |
NiCr-NiSi | K | -200-1300 |
NiCr-CuNi | E | -200-900 |
Fe-CuNi | J | -40-750 |
Cu-CuNi | T | -200-350 |
NiCrSi-NiSi | N | -200-1300 |
NiCr-AuFe0.07 | NiCr-AuFe0.07 | -270-0 |
3 . Dimensions and Tolerance of Fiberglass Insulated Thermocouple Wire
Dimensions / Tolerance mm ) : 4.0+/-0.25
Color code & initial calibration tolerances for thermocouple wire:
Thermocouple Type | ANSI Color Code | Initial Calibration Tolerances |
Wire Alloys | Calibration | +/-
Conductor | Jacket | Temperature
Range | Standard
Limits | Special
Limits |
Iron(+) vs.
Constantan(-) | J | White/Red | Brown | 0°C to +285°C
285°C to +750°C | ±2.2°C
± .75% | ±1.1°C
± .4% |
CHROMEL(+) vs.
ALUMEL(-) | K | Yellow/Red | Brown | -200°C to -110°C
-110°C to 0°C
0°C to +285°C
285°C to +1250°C | ± 2%
±2.2°C
±2.2°C
± .75% | ±1.1°C
± .4% |
Copper(+) vs.
Constantan(-) | T | Blue/Red | Brown | -200°C to -65°C
-65°C to +130°C
130°C to +350°C | ± 1.5%
±1°C
± .75% | ± .8%
± .5°C
± .4% |
CHROMEL(+) vs.
Constantan(-) | E | Purple/Red | Brown | -200°C to -170°C
-170°C to +250°C
250°C to +340°C
340°C+900°C | ± 1%
±1.7°C
±1.7°C
± .5% | ±1°C
±1°C
± .4%
± .4% |
Color Code & Initial Calibration Tolerance for Extension Wire:
Extension type | ANSI Color Code | Initial Calibration Tolerances |
Wire Alloys | Calibration | +/-
Conductor | Jacket | Temperature Range | Standard
Limits | Special
Limits |
Iron (+) vs. Constantan(-) | JX | White/Red | Black | 0°C to +200°C | ±2.2°C | ±1.1°C |
CHROMEL (+) vs. ALUMEL (-) | KX | Yellow/Red | Yellow | 0°C to +200°C | ±2.2°C | ±1.1°C |
Copper(+) vs. Constantan(-) | TX | Blue/Red | Blue | -60°C to +100°C | ±1.1°C | ± .5°C |
CHROMEL(+) vs. Constantan(-) | EX | Purple/Red | Purple | 0°C to +200°C | ±1.7°C | ±1.1°C |
PVC-PVC Physical Properties:
Characteristics | Insulation | Jacket |
Abrasion Resistance | Good | Good |
Cut Through Resistance | Good | Good |
Moisture Resistance | Excellent | Excellent |
Solder Iron Resistance | Poor | Poor |
Service Temperature | 105ºC continuous
150ºC single | 105ºC continuous
150ºC single |
Flame Test | Self-extinguishing | Self-extinguishing |
