Accurate And Stable Type T Thermocouple Wire Positive Leg Cu(TP) For Scientific Research And Humidity Resistance

Type T thermocouple wire consists of Copper (Cu, TP) as the positive leg and Constantan (Cu-Ni alloy, TN) as the negative leg. It is widely used for low-temperature measurements, offering high accuracy and stability. The Type T thermocouple's positive leg, composed of pure copper (Cu(TP)), is a critical component in cryogenic and low-temperature measurement systems. As one of the most stable thermoelectric materials, Cu(TP) offers a linear output voltage of approximately 43 μV/°C over its operational range of -200°C to 350°C (some specialized grades up to 400°C). The high purity copper (≥99.95%) ensures excellent thermal conductivity and minimal resistance variation, making it ideal for precise temperature sensing in environments like refrigeration systems, food processing, and medical devices.

Composition & Properties:

• Positive Leg (TP): Pure Copper (~99.9%)
• Temperature Range: -200°C to 350°C
• Accuracy: ±1.0°C or 0.75% (Standard), ±0.5°C or 0.4% (Special)
• Electrical Conductivity: High (similar to pure copper)
• Corrosion Resistance: Good in dry air but prone to oxidation in humid environments
• EMF Output: ~40.69 µV/°C at 0-100°

Thermocouple temperature range and tolerance

Key Features of Type T Positive Leg (Cu, TP):

• Material Composition: 99.9% pure copper
• Temperature Range: -200°C to 370°C (-328°F to 698°F)
• Electrical Conductivity: High, as it is made of pure copper
• Corrosion Resistance: Good resistance to oxidation in moist environments
• Thermoelectric Stability: Excellent for cryogenic and laboratory applications
• Accuracy: ±0.5°C or better in standard limits of error (IEC 60584, ASTM E230)
• Compatibility: Works with the Constantan (Cu-Ni) negative leg (TN)
• Color Code:

ANSI/IEC: Blue outer jacket, Copper-colored positive lead

Applications

• Cryogenics & Refrigeration (low-temperature monitoring)
• Biomedical & Laboratory Equipment
• Food Processing & Cold Storage
• Environmental Monitoring Systems

Key Advantages:

• High Precision: Stable output at cryogenic temperatures
• Good Conductivity: Fast response time
• Cost-Effective: Compared to noble metal thermocouples
• Non-Magnetic: Suitable for sensitive environments

Limitations:

• Limited High-Temperature Use – Oxidation risk above 350°C
• Copper Susceptibility – Requires proper insulation to prevent interference

Type T thermocouple with Cu (TP) positive leg is ideal for precise low-temperature measurement applications, ensuring reliable performance in demanding environments.

• 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.