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
IEC 60584-1 |
| Ⅱ | -40~900 | ±2.5℃ or ±0.75%t |
Key Features of NiCr-CuNi (Type E) Thermocouple Wire:
Produces the highest thermoelectric output (Seebeck coefficient) of all standard thermocouple types, approximately 68 µV/°C, making it highly sensitive to temperature changes.
Operates effectively in temperatures from -270°C to 870°C (-454°F to 1600°F).
Particularly effective for cryogenic and moderate high-temperature applications.
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.
Positive Leg (NiCr): Typically 90% Nickel and 10% Chromium.
Negative Leg (CuNi/Constantan): Typically 55% Copper and 45% Nickel.
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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