Cu-CuNi Type T Constantan Thermocouple Wire Essential for Precise Temperature Control in Cold Environments

Cu-CuNi Type T Constantan Thermocouple Wire is a temperature-sensing wire composed of a positive leg of copper (Cu) and a negative leg of Copper-Nickel alloy (CuNi), also known as Constantan. Type T thermocouples are renowned for their high accuracy and excellent stability in low-temperature measurements. They are commonly used for precise temperature measurements in a variety of scientific, industrial, and medical applications. Cu-CuNi Type T Constantan Thermocouple Wire is an excellent choice for precise temperature measurements in low-temperature applications. With high sensitivity, excellent accuracy, and good stability, it is widely used in cryogenic systems, laboratories, food processing, and medical applications. Its non-magnetic nature and corrosion resistance make it reliable and effective, though it is limited by its lower maximum temperature range compared to other thermocouple types.

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

Key Features of Cu-CuNi Type T Thermocouple Wire:

• Temperature Range

Operates effectively in the range of -200°C to 350°C (-328°F to 662°F), making it suitable for low-temperature applications such as cryogenics and laboratory work.

• High Sensitivity

Type T thermocouples provide a high thermoelectric voltage of approximately 50 µV/°C at 0°C, making them highly sensitive and ideal for precise temperature measurements in the low-temperature range.

• Material Composition

Positive Leg (Cu): Pure copper, providing excellent conductivity and stable thermoelectric properties at lower temperatures.

Negative Leg (CuNi/Constantan): A copper-nickel alloy, typically consisting of 55% copper and 45% nickel, known for its high resistance to corrosion and stability.

• Electrical Properties

Provides a stable and repeatable thermoelectric voltage, with good linearity over a wide temperature range within its limits.

• Corrosion Resistance

The Constantan (CuNi) leg is resistant to oxidation, particularly in dry environments and at lower temperatures.

Copper, while stable at lower temperatures, is susceptible to oxidation at higher temperatures, so Type T thermocouples are typically used in conditions where high-temperature oxidation is not a concern.

• Good Accuracy

Type T thermocouples are among the most accurate for low-temperature applications, offering an accuracy of ±0.5°C or ±0.75% of the measured value.

• Magnetic Properties

Type T thermocouples are non-magnetic, making them ideal for applications where magnetic fields could interfere with the temperature measurement.

Applications

• Cryogenics: Used in the precise temperature measurement of cryogenic systems, such as liquefied gases and supercooled environments.
• Food & Pharmaceutical Industries: Temperature monitoring in low-temperature storage and refrigerated environments.
• Laboratory Use: Ideal for low-temperature studies, calibration, and controlled temperature experiments.
• HVAC: Suitable for temperature measurement in cooling systems.
• Medical Applications: Used in devices requiring accurate low-temperature sensing, such as thermometers and incubators.

Cable Options

• Available in various forms, including bare wire, insulated wire, and cables, with insulation materials like Teflon, fiberglass, or ceramic to meet environmental and durability requirements.

Advantages of Type T Thermocouple Wire:

• High Accuracy: Excellent for low-temperature measurements with minimal deviation.
• Good Sensitivity: Provides accurate readings in the low-temperature range.
• Corrosion-Resistant: Constantan offers high resistance to corrosion, ensuring long service life in non-oxidizing environments.
• Non-Magnetic: Ideal for applications where magnetism is a concern.
• Stable in Cryogenic Environments: Performs well at cryogenic temperatures, making it suitable for scientific research and low-temperature experiments.

Limitations:

• Limited High-Temperature Range: Type T is not suitable for high-temperature applications, with a maximum limit of 350°C (662°F).
• Copper Oxidation: The copper leg can oxidize at higher temperatures or in oxidizing environments, limiting its use in high-temperature applications.

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.