Cu-CuNi Type T Constantan Thermocouple Wire for Accurate Temperature Measurements in Laboratories

Cu-CuNi Type T Constantan Thermocouple Wire is a temperature sensing element made of copper (Cu) for the positive leg and a Copper-Nickel (CuNi) alloy, also known as Constantan, for the negative leg. Type T thermocouples are well-regarded for their high accuracy, low-temperature sensitivity, and resistance to corrosion, particularly in low-temperature and humid environments.

Cu-CuNi Type T Constantan Thermocouple Wire is a high-precision, low-temperature thermocouple that offers excellent accuracy, sensitivity, and stability. It is especially useful for cryogenic measurements, scientific research, and applications where humidity resistance is required. The combination of copper and copper-nickel alloy allows it to excel in environments prone to oxidation and corrosion, though its temperature range is limited to low-to-moderate temperatures. Type T thermocouples are well-suited for industries and research areas that require precise low-temperature measurements, such as medical, food, and environmental testing.

Color codes of thermocouple ( T type )

Thermocouple temperature range and tolerance

Key Features of Cu-CuNi Type T Thermocouple Wire:

• Temperature Range

-200°C to 350°C (-328°F to 662°F).

Ideal for low-temperature applications, such as cryogenic temperatures and laboratory settings.

• High Sensitivity

Type T thermocouples provide excellent accuracy with a thermoelectric voltage of approximately 50 µV/°C at 0°C.

Offers high sensitivity, particularly at low temperatures, making it ideal for precise measurements in cryogenic applications.

• Material Composition

Positive Leg (Cu): Pure copper is highly conductive, ensuring rapid and accurate response to temperature changes.

Negative Leg (CuNi/Constantan): Copper-Nickel alloy (usually 55% copper and 45% nickel) provides excellent stability and resistance to corrosion and oxidation, especially in humid environments.

• Corrosion and Oxidation Resistance

Copper Leg: Copper has good resistance to oxidation at low and moderate temperatures but is susceptible to oxidation at higher temperatures.

Constantan Leg: The Copper-Nickel alloy (Constantan) is highly resistant to oxidation and corrosion, particularly in humid or moist environments, making Type T a good choice for high-humidity applications.

• Electrical Properties

Excellent thermoelectric properties that allow for highly accurate temperature measurements, especially in the low-temperature range.

Low temperature drift, ensuring long-term stability and reliability in measurements.

• Magnetic Properties

Type T thermocouples are non-magnetic, making them suitable for sensitive applications where magnetic fields must be avoided.

Applications

• Cryogenics: Commonly used in low-temperature measurements (cryogenic applications) because of their high sensitivity and low drift at temperatures as low as -200°C.
• Scientific Research: Used in laboratories where precise temperature control is required for experiments.
• HVAC & Environmental Testing: Ideal for temperature measurements in humid environments and environmental testing.
• Medical: Suitable for monitoring body temperature in medical devices.
• Food Processing: Used in refrigeration and food storage facilities where low-temperature measurements are needed.​

Cable Options

• Available in bare wire, insulated wire, or cable configurations, with various insulation materials such as fiberglass, Teflon, and ceramic.
• Can be shielded or unshielded depending on the application, particularly in environments with electrical interference.

Advantages of Type T Thermocouple Wire:

• Accuracy at Low Temperatures: Type T is one of the most accurate thermocouples in the low-temperature range.
• Non-Magnetic: This feature makes it ideal for sensitive applications, such as medical equipment or precision instruments.
• Corrosion and Oxidation Resistance: Excellent performance in humid and moisture-rich environments due to the corrosion resistance of the Constantan leg.
• Stable Performance: Offers low drift and good long-term stability, making it reliable for applications that require consistent results.

Limitations:

• Limited High-Temperature Range: Type T is not suitable for high-temperature environments (above 350°C), limiting its use in industrial applications that require higher temperatures.
• Oxidation of Copper Leg: The copper leg can oxidize at higher temperatures, reducing the lifespan of the thermocouple if exposed to high-temperature or oxidizing environments.
• More Expensive Than Other Thermocouples: Due to its high sensitivity and specialized use, Type T can be more expensive compared to other common thermocouples like Type K.

Company Overview:

Jiangyin Chengxin Alloy Material Co., Ltd has more than 20 years of experience as the lead.ing alloy wire manufacturer in China. We offer a wide range of services from fine wire drawing toresistance wire manufacturing. Since the beginning, our specialty has been the quality and preci.sion of our products. We have the tightest tolerances and deliver within a few days to a fewweeks. As a result, we have become the leading alloy wire supplier in the industry.

Senphus Subsidiaries:

• Jiangyin Chengxin Alloy Material Co., Ltd.
• Jiangyin Senphus Electrical Materials Co., Ltd.
• Jiangsu Xiangcheng Supply Chain Management Co., Ltd.

Jiangyin Chengxin Alloy Material Co., Ltd.: With nearly 20 years of experience, Jiangyin Chengxin is a leading alloy wire manufacturer in China. We offer a wide range of services, from fine wire drawing to resistance wire manufacturing. Our specialty lies in the quality and precision of our products, achieving the tightest tolerances and delivering orders within days to weeks. As a result, we have established ourselves as the premier supplier of alloy wire in the industry.

Our product range includes:

• Copper-nickel alloys (CuNi1-CuNi44)
• Karma (Nikrothal L/Evanohm/Alloy 800)
• Manganin and Constantan
• Nickel-chromium alloys
• Thermocouple alloys (Type K, N, E, T, J)
• Thermocouple extension wire
• PTC thermistor resistance alloy
• Pure nickel wire and Monel alloy

These alloys are available in various forms, including wire, ribbon, stranded, and enamelled. Major applications include seat heating, underfloor heating, military projects, aerospace, household appliances, heating wire, mechanical and electrical plants, and temperature instruments. Our manufacturing processes are ISO 9001:2015 certified, and we specialize in fine and ultra-fine wire drawing, offering wire diameters from 0.025 mm (0.001") to 13 mm (0.51") in small batches, medium volumes, and mass production. We maintain a comprehensive quality inspection system, including in-house chemical analysis, chromatographic analysis, metallurgical analysis, pinhole tests, wire construction tests, and tension tests to ensure the highest quality standards.

Senphus Electrical Material Co., Ltd.: Founded in 2003, Senphus Electrical Material Co., Ltd. integrates research, manufacturing, and sales of electric heating alloys, heating cables, heating wires, and heating products. Leveraging over a decade of technical expertise in heating alloy wire, we have adopted advanced heating cable technology and machinery, successfully developing heating cables, temperature controllers, and temperature control systems suitable for building heating, pipe insulation, outdoor snow melting, wind power blade production, car seat heating, and healthcare applications.

The company is recognized as a high-tech enterprise in Jiangsu Province and a small giant enterprise in Jiangyin City, specializing in innovative technologies. We operate the "Wuxi Heating Cable Engineering Technology Research Center" and collaborate with experts from renowned domestic universities. Our portfolio includes 5 invention patents and over 30 utility model patents, showcasing our strong research and development capabilities.

With an annual output exceeding 1,000 tons of thermal alloy wire and an output value of approximately 105 million yuan, our products are well-received in markets such as the UK, Italy, Canada, Peru, and Spain. Our heating cables generate an annual output value of over 80 million yuan, with exports to Germany, Japan, the United States, Malaysia, Denmark, Brazil, and other countries.

The company has successfully passed multiple quality management system certifications, including IATF 16949, ISO 9001, ISO 14001 (Environmental Management System), and ISO 45001 (Occupational Health and Safety Management System). Our heating cables and related products have also obtained test reports from the Shanghai Cable Research Institute Test Center and received certifications such as UL (United States), VDE (Germany), CE (European Union), and RoHS.

Commitment to Quality: We adhere to the business commitment of "Reputation First, Quality First, Customer First" and uphold the quality policy of "Integrity-Based, Quality-Oriented, Excellent Service." We are dedicated to providing accurate products and professional services, and we look forward to collaborating sincerely with you to achieve mutual success.