SWG 19 ANSI standard Type K Thermocouple extension Cable FEP
Insulation
Type K (CHROMEL vs ALUMEL ) is used in oxidizing, inert or dry
reducing atmospheres. Exposure to vacuum limited to short time
periods. Must be protected from sulfurous and marginally oxidizing
atmospheres. Reliable and accurate at high temperatures.
1. Chemical Composition
| Material | Chemical composition (%) |
| Ni | Cr | Si | Mn | Al |
| KP(Chromel) | 90 | 10 | | | |
| KN(Alumel) | 95 | | 1-2 | 0.5-1.5 | 1-1.5 |
2. Physical properties and Mechnical properties
Material |
Density(g/cm3) |
Melting point℃) |
Tensile Strength(Mpa) |
Volume resistivity(μΩ.cm) |
Elongation rate (%) |
| KP(Chromel) | 8.5 | 1427 | >490 | 70.6(20℃) | >10 |
| KN(Alumel) | 8.6 | 1399 | >390 | 29.4(20℃) | >15 |
3. EMF Value range at different temperature
| Material | EMF value Vs Pt(μV) |
| 100℃ | 200℃ | 300℃ | 400℃ | 500℃ | 600℃ |
| KP(Chromel) | 2816~2896 | 5938~6018 | 9298~9378 | 12729~12821 | 16156~16266 | 19532~19676 |
| KN(Alumel) | 1218~1262 | 2140~2180 | 2849~2893 | 3600~3644 | 4403~4463 | 5271~5331 |
| EMF value Vs Pt(μV) |
| 700℃ | 800℃ | 900℃ | 1000℃ | 1100℃ |
| 22845~22999 | 26064~26246 | 29223~29411 | 32313~32525 | 35336~35548 |
| 6167~6247 | 7080~7160 | 7959~8059 | 8807~8907 | 9617~9737 |
Specifications
1.Style:Extension Wire
2.Thermocouple copper wire
Thermocouple copper wire Classification
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 |
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% |
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 |
Products&Package:
