Cu-CuNi Type T Thermocouple Extension Wire For Accurate Temperature Measurement In Low To Moderate Ranges

Type T thermocouple extension wire, made of Cu-CuNi, is recognized for its accuracy and stability in temperature measurement. It operates effectively in the temperature range of -200°C to 350°C, making it suitable for moderate to low-temperature applications. The copper (Cu) and copper-nickel (CuNi) construction provides a stable EMF output, ensuring reliable temperature readings. Type T is commonly used in cryogenics, laboratory settings, food processing, and industrial processes where precise temperature control is crucial. Its performance in moist and oxidizing environments adds to its versatility. The Type T thermocouple is also cost-effective and widely compatible with standard measurement equipment, making it a popular choice for various temperature sensing applications.

Color codes of thermocouple ( T type )

Type T thermocouple has good resistance to oxidation, high EMF output, with good temperature accuracy, sensitivity and stability. In the temperature range -200~0 ℃ , it has better property, the year stability is less than ±3μV.

Thermocouple temperature range and tolerance

Compensating wire reciprocating resistance:

Some Key Features Cu-CuNi (Type T) Constantan Thermocouple Wire include:

• Stability and Accuracy: Type T thermocouples are known for their stability and accuracy, especially in low-temperature applications such as cryogenics or ultra-low freezers. They have excellent repeatability between –200°C to 200°C.
• Chemical Composition: The positive leg (TP) is made of pure copper, while the negative leg (TN) is an alloy of approximately 55% copper and 45% nickel.
• Temperature Range: The operational temperature range for Type T thermocouple grade wire is -270°C to 370°C, while for extension wire, it is 0°C to 200°C.
• Resistance to Oxidation: Type T thermocouples have good resistance to oxidation, which is crucial for maintaining accuracy over time.
• EMF Output: They have a high EMF output, contributing to their sensitivity and stability in temperature measurements.
• Physical Properties: The positive leg (TP) has a density of 9 g/cm³, a melting point of 1084°C, and a resistivity of 0.018 Ω·mm²/m at 20°C. The negative leg (TN) has a density of 8.9 g/cm³, a melting point of 1220°C, and a resistivity of 0.5 Ω·mm²/m at 20°C.
• Tolerance: Standard tolerance for Type T thermocouples is ±0.5°C or ±0.4% of the temperature.
• Atmospheric Conditions: Type T thermocouples can be used in oxidizing, reducing, or inert atmospheres.
• Color Coding: The positive leg (Cu) is brown, and the negative leg (CuNi) is white, which helps in identification during installation and maintenance.

These features make Cu-CuNi (Type T) thermocouple wire a reliable choice for a variety of temperature measurement applications where precision and stability are essential.

Applications:

• Cryogenics: Type T thermocouples are reliable for ultra-low temperature measurements, making them suitable for cryogenic applications where extremely low temperatures are involved.
• Food Processing: They are used for accurate temperature control during cooking or freezing in the food industry, benefiting from their high level of accuracy and performance in the presence of moisture without oxidizing.
• Laboratory Testing: Ideal for controlled experimental setups requiring precise temperature readings, Type T thermocouples offer excellent repeatability between –200°C to 200°C.
• HVAC Applications: They are commonly used in heating, ventilation, and air conditioning systems for temperature sensing, especially where lower range temperature measurements are necessary.
• Industrial and Household Appliances: Type T thermocouples are found in various industrial applications and home appliances due to their affordability and moderate temperature range.
• Differential Measurement: Type T is often used for differential measurement because only the copper wire touches the probes, and it does not display any changes in characteristics due to the lack of a Curie Point, as both conductors are non-magnetic.

These applications highlight the versatility and reliability of Cu-CuNi (Type T) thermocouple wire in providing accurate temperature measurements across different environments and industries.