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Type N Thermocouple Bare Wire NP NN 0.8mm Diameter High Temperature Resistant Thermocouple Wire
| Place of Origin | Shanghai |
|---|---|
| Brand Name | Huona |
| Certification | ISO9001 |
| Model Number | Type N |
| Minimum Order Quantity | 10KG |
| Price | Negotiable |
| Packaging Details | Carton/Wooden case |
| Delivery Time | 5-21 days |
| Payment Terms | L/C,T/T,Western Union |
| Supply Ability | 500 tons per month |
Product Details
| Alloy Grade | Type N | Diameter | 0.8mm (±0.01mm) |
|---|---|---|---|
| Form | Spool (50m/leg) | Accuracy Class | IEC Class 1 |
| Operating Temperature | -270°C ~ 1300°C (continuous) | Tensile Strength | ≥600 MPa (NP/NN) |
| Elongation | ≥20% | Thermoelectric Power | ~27.7 µV/°C At 100°C |
| Highlight | Type N thermocouple bare wire,0.8mm thermocouple wire high temperature,NP NN thermocouple wire resistant |
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Product Description
Type N Thermocouple Bare Wire (NP/NN) – 0.8mm Diameter
Product Overview
This Type N thermocouple bare wire from Huona is a high-stability, long-life thermoelectric wire pair composed of NP (Nicrosil, positive leg) and NN (Nisil, negative leg), specifically engineered to address the limitations of Type K at high temperatures. Manufactured via precision vacuum melting, fine drawing, and controlled annealing, it delivers exceptional resistance to oxidation, “green rot” degradation, and thermoelectric drift, making it ideal for demanding industrial and power generation applications.
Core Specifications
- Product Name: Type N Thermocouple Bare Wire (NP/NN Pair)
- Alloy Composition:
- NP (Positive Leg): Nicrosil (Ni: ~84%, Cr: ~14.2%, Si: ~1.4%, Mg: ~0.1%)
- NN (Negative Leg): Nisil (Ni: ~95.5%, Si: ~4.4%, Mg: ~0.1%)
- Diameter: 0.8mm (customizable: 0.2–3.0mm)
- Tolerance: ±0.01mm
- Form: Spool (standard length: 50m/leg; custom lengths available)
- Thermoelectric Performance:
- Accuracy Class: IEC Class 1 (±1.5°C or ±0.4% of reading, whichever is greater)
- Thermoelectric Power: ~27.7 µV/°C at 100°C
- Operating Temperature Range: -270°C ~ 1300°C (continuous use; short-term up to 1350°C)
- Standards Compliance: IEC 60584-1, ASTM E230, GB/T 4989, RoHS 2.0
- Manufacturer: Huona (Shanghai) New Material Co., Ltd.
Key Differentiating Advantages
1. Superior High-Temperature Stability (vs. Type K)
Unlike Type K thermocouples, which suffer from severe thermoelectric drift and “green rot” oxidation at 800–1000°C, Type N NP/NN wire maintains consistent thermoelectric performance at temperatures up to 1300°C. This eliminates the need for frequent calibration and replacement in high-temperature furnaces and boilers.
2. Excellent Oxidation & Sulfidation Resistance
The Nicrosil/Nisil alloys form a dense, protective SiO₂-rich oxide layer at high temperatures, providing far better resistance to oxidation and sulfidation than Chromel/Alumel. This significantly extends service life in industrial environments with flue gases or mild sulfur contamination.
3. Low Drift for Long-Term Monitoring
Type N wire exhibits minimal thermoelectric drift even after thousands of hours of continuous use at high temperatures, making it ideal for critical process monitoring in power plants, petrochemical refineries, and steel mills.
4. Balanced Mechanical Properties
With a tensile strength ≥600 MPa and elongation ≥20%, the wire offers good flexibility for forming probes while maintaining sufficient strength for high-temperature installations. Its fine-grained microstructure resists cracking during thermal cycling.
5. Versatile Compatibility
Compatible with standard Type N thermocouple connectors, extension wires, and instrumentation, allowing seamless replacement of Type K in high-temperature applications without system overhauls.
Technical Specifications Table
| Attribute | Value (Typical) |
|---|---|
| Alloy Grade | NP (Nicrosil) / NN (Nisil) |
| Diameter | 0.8mm (±0.01mm) |
| Form | Spool (50m/leg) |
| Accuracy Class | IEC Class 1 |
| Operating Temperature | -270°C ~ 1300°C (continuous) |
| Tensile Strength | ≥600 MPa (NP/NN) |
| Elongation | ≥20% |
| Surface Finish | Bright, oxide-free |
| Packaging | Anti-oxidation spool packaging |
Typical Applications
- Power Generation: Boiler superheater and turbine exhaust temperature monitoring in coal-fired and gas-fired power plants.
- Steel & Metal Processing: Temperature control in reheating furnaces, annealing ovens, and continuous casting processes.
- Petrochemical Refining: Catalytic cracker and reformer temperature monitoring in harsh, sulfur-containing environments.
- Aerospace & Defense: High-temperature sensing in jet engine components and rocket propulsion systems.
- Industrial Furnaces: Long-term monitoring in glass melting kilns, ceramic sintering furnaces, and heat treatment ovens.
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