NiCr-CuNi Type E Thermocouple Wire for Accurate Temperature Measurement in Cryogenic Environments
NiCr-CuNi Type E Constantan Thermocouple Wire is a thermocouple material composed of a positive leg made of Nickel-Chromium alloy (NiCr) and a negative leg made of Copper-Nickel alloy (CuNi), commonly known as Constantan. Type E thermocouples are known for their high accuracy, excellent sensitivity, and suitability for low to moderate temperature ranges.
NiCr-CuNi Type E Constantan Thermocouple Wire is a high-sensitivity, precise thermocouple material ideal for low-to-moderate temperature measurements. Its excellent accuracy, corrosion resistance, and high thermoelectric voltage make it a preferred choice for industries requiring precise and reliable temperature monitoring in oxidizing or neutral environments.
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 voltage of all common thermocouple types, approximately 68 µV/°C at 0°C, ensuring accurate temperature readings.
Effective for temperature measurements between -200°C to 900°C (-328°F to 1652°F), making it suitable for various applications.
Type E thermocouples have a standard tolerance of ±1.7°C or ±0.5% of the measured temperature, ensuring precision in temperature monitoring.
NiCr-CuNi thermocouples exhibit good resistance to oxidation and corrosion, especially in environments with low oxygen levels.
Performs well in both oxidizing and inert atmospheres.
Positive Leg (NiCr): Typically 90% Nickel and 10% Chromium.
Negative Leg (CuNi/Constantan): Approximately 55% Copper and 45% Nickel.
High Seebeck coefficient provides excellent signal output for low-temperature measurements.
Ideal for cryogenic and low-temperature applications due to its high sensitivity.
Commonly used in industries like aerospace, medical equipment, and research laboratories for precise temperature monitoring.
Also suitable for high-accuracy measurements in oxidizing or neutral environments.
Available as bare wire, insulated wire, or cables with various insulation materials such as fiberglass, Teflon, or ceramic.
Can be shielded or unshielded depending on application requirements.
Advantages of Type E Thermocouple Wire:
- High sensitivity allows for accurate readings in low-temperature ranges.
- Performs well in oxidizing and low-oxygen environments.
- Does not contain iron, making it resistant to corrosion from oxidizing atmospheres.
Limitations:
- Not recommended for use in reducing or sulfur-containing environments.
- Limited temperature range compared to other types, such as Type K.
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