New Development: Thick-Film Polyimide Enameled Constantan Wire for T‑Type Thermocouples

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Enhanced insulation, high thermal stability, and reliable performance — now available for precision temperature measurement applications.

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We are pleased to announce the successful development of a new product: aromatic polyimide enameled constantan round wire with Grade 3 thick-film insulation, specifically designed for T‑type thermocouples. A stainless steel braided shielded version is also available for additional mechanical protection.

What is Constantan?
Constantan is a copper‑nickel resistance alloy known for its low temperature coefficient of resistance, wide operating range (up to 480°C), excellent workability, and strong solderability. It is widely used in electronic components for instruments, industrial equipment, and precision electronics.

Why Aromatic Polyimide?
Aromatic polyimide is a high‑performance polymer offering outstanding thermal stability, chemical resistance, and electrical insulation. These properties make it ideal for demanding applications in aerospace, automotive, and high‑reliability electronics.

Technical Challenge & Solution
The naturally smooth surface of constantan wire poses adhesion challenges for polyimide coatings. Through repeated trials, our R&D team successfully resolved this issue and achieved a Grade 3 thick polyimide film — significantly improving insulation performance and breakdown voltage.

Available Specifications

Applications

• T‑type thermocouples

• Precision temperature measurement

• Instruments and industrial electronics

For technical data sheets or sample requests, please contact our team.