NiCr-CuNi Type E Constantan Thermocouple Wire Versatile and Accurate for Industrial
NiCr-CuNi Type E Constantan Thermocouple Wire Versatile and Accurate for Industrial
NiCr-CuNi Type E Thermocouple Wire is a highly accurate thermocouple material known for its excellent thermoelectric properties and high sensitivity. It consists of a positive leg made of Nickel-Chromium alloy (NiCr) and a negative leg made of Copper-Nickel alloy (CuNi), also known as Constantan. Type E thermocouples are ideal for applications requiring precise temperature measurements in a wide range of environments.
NiCr-CuNi Type E (Constantan) Thermocouple Wire is a highly sensitive and accurate thermocouple material suitable for cryogenic and moderate high-temperature applications. Its superior thermoelectric output, non-magnetic nature, and excellent performance in clean environments make it ideal for precise temperature measurement in scientific, industrial, and medical applications.
Color codes of thermocouple ( E type )
| Name | EP | EN |
| Melting Range (℃) | 1427 | 1220 |
| Density (g/cm³) | 8.5 | 8.8 |
| Resistivity (μΩm20℃) | 70.6 | 49.0 |
Resistance-temperature coefficient ×10-4/K(0℃-1000℃ | 2.9 | 0.5 |
| Tensile strength Rm N/mm² MPa | ≥490 | ≥390 |
Elongation L0=100mm % | ≥25 | ≥25 |
Name | Usag Classification | Grade | Max. operating temperature(℃) | emperitre nres) | Tnlerene | Standard | |
Lang term | Short term | ||||||
NiCr-CuNi(Type E) hermocouple bnght wire | E | l | 750 | 900 | -40~800 | ±1.5℃ or ±0.4%t | GB/T4993 |
| Ⅱ | -40~900 | ±2.5℃ or ±0.75%t | |||||
Key Features of NiCr-CuNi (Type E) Thermocouple Wire:
- High Sensitivity
Produces the highest thermoelectric output (Seebeck coefficient) of all standard thermocouple types, approximately 68 µV/°C, making it highly sensitive to temperature changes.
- Wide Temperature Range
Operates effectively in temperatures from -270°C to 870°C (-454°F to 1600°F).
Particularly effective for cryogenic and moderate high-temperature applications.
- Excellent Accuracy
Provides precise temperature readings with standard tolerances of ±1.7°C or ±0.5% of the measured temperature.
- Good Corrosion Resistance
Resistant to oxidation in clean and dry environments, but not suitable for reducing or sulfurous atmospheres.
The Constantan (CuNi) leg provides stability in various conditions.
- Material Composition
Positive Leg (NiCr): Typically 90% Nickel and 10% Chromium.
Negative Leg (CuNi/Constantan): Typically 55% Copper and 45% Nickel.
- Electrical Properties
Stable thermoelectric behavior ensures consistent readings over extended periods.
Ideal for low-voltage signal measurement.
Applications
- Suitable for laboratory, industrial, and cryogenic applications.
- Commonly used in medical devices, scientific research, and food processing industries.
- Preferred for environments where high sensitivity and precise readings are critical.
Cable Options
- Available in bare wire or insulated wire and cable with various insulation materials, such as fiberglass, PVC, or Teflon, for diverse environments.
- Shielded cables are available for applications requiring noise resistance.
Advantages of Type E Thermocouple Wire:
- Superior sensitivity, ideal for detecting small temperature changes.
- Can be used in cryogenic environments due to its low-temperature performance.
- Non-magnetic, making it suitable for sensitive applications.
- High signal output reduces the need for amplification in some setups.
Limitations:
- Limited resistance to reducing or sulfurous atmospheres, which can degrade the wires.
- Not suitable for very high-temperature environments beyond its upper limit of 870°C (1600°F).
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