NiCr-NiSi Type K Thermocouple Wire And Cable Ideal For Industrial Laboratory And Scientific Uses
NiCr-NiSi (Type K) Thermocouple Wire and Cable is a widely used thermocouple material designed for measuring temperatures in a range of industrial and scientific applications. It is composed of two distinct alloys—Nickel-Chromium (NiCr) and Nickel-Silicon (NiSi)—and is known for its durability, accuracy, and high-temperature performance.NiCr-NiSi (Type K) Thermocouple Wire is a versatile and reliable choice for high-temperature applications, offering durability, accuracy, and affordability for a wide range of industrial needs.
Color codes of thermocouple wire (K type)
Positive wire is yellow, negative wire is red. 
| Name | KP | KN |
| Melting Range (℃) | 1427 | 1399 |
| Density (g/cm³) | 8.5 | 8.6 |
| Resistivity (μΩm20℃) | 70.6 | 29.4 |
| Resistance-temperature coefficient
×10-4/K(0℃-1200℃) | 29 | 16.3 |
| Tensile strength Rm N/mm² MPa | ≥490 | ≥390 |
| Elongation % | ≥10 | ≥15 |
Thermocouple temperature range and tolerance
Name |
Usag Classification |
Grade | Max. operating temperature(℃) |
emperitre nres) |
Tnlerene |
Standard |
Lang term |
Short term |
NiCr-NiSi (Type K)
thermocouple
bright wire | K | l | 1200 | 1300 | -40~1100 | +1.5℃ or +0.4%t | GB/T2614
IEC 584-1 |
| Ⅱ | -40~1300 | +2.5℃ or +0.75%t |
Key Features of Type K Thermocouple Wire:
Operates effectively between -200°C to +1250°C (-328°F to +2282°F), making it suitable for high-temperature applications.
Resistant to oxidation, corrosion, and mechanical wear in demanding environments, including high-humidity and oxidizing atmospheres.
- Good Stability and Sensitivity:
Provides reliable and accurate temperature measurements over a wide range.
Has a Seebeck coefficient (thermoelectric voltage) that ensures sensitivity across the operating temperature range.
- Robust Material Composition:
Positive Leg (KP): Nickel-Chromium (approximately 90% Ni, 10% Cr).
Negative Leg (KN): Nickel-Silicon (approximately 95% Ni, 2% Si, and trace elements).
Widely used with thermocouple connectors, extension cables, and measurement instruments.
Standardized by international thermocouple standards like IEC 60584 and ANSI MC96.1.
- High Oxidation Resistance:
Suitable for oxidizing atmospheres, but not recommended for reducing or sulfurous environments at high temperatures.
Type K thermocouples are less expensive compared to noble metal thermocouples (e.g., Type R or S), while still offering reliable performance.
Applications:
- Industrial Processes: Furnaces, kilns, and heat treatment.
- Aerospace: Jet engine monitoring and exhaust gas temperature measurement.
- Automotive: Emission testing and temperature monitoring in engines.
- Energy: Power plants, including gas turbines and boilers.
- General Manufacturing: Plastics, glass, and metal processing.
Advantages of Type K Thermocouple Wire:
- Wide temperature range.
- High durability and resistance to oxidation.
- Cost-effective and widely available.
- Reliable and accurate performance for most industrial applications.
Limitations:
- Not suitable for use in reducing, vacuum, or sulfurous environments at high temperatures, as this can degrade the materials.
- Susceptible to drift at extremely high temperatures over time.
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NiCr-NiSi Type K Thermocouple Wire And Cable Ideal For Industrial Laboratory And Scientific Uses Images
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