Constantan Copper Nickel Wire125g Reel, 0.45mm, 26 SWG

High-Precision Constantan (Copper-Nickel) Resistance Wire

Constantan, also widely recognised by the trade names Eureka, Advance, and Ferry, is a specialised copper-nickel alloy comprised of 55% Copper and 45% Nickel. It is a fundamental material in electrical engineering due to its unique physical properties—specifically its constant resistivity across a broad temperature spectrum.

Unlike standard conductors, Constantan’s resistance does not fluctuate significantly with temperature changes. This remarkably low temperature coefficient makes it the definitive choice for applications where precision and stability are non-negotiable.

Key Applications:

• Precision Resistors: Ideal for manufacturing high-stability resistors, potentiometers, and shunt resistors.
• Thermocouples: Frequently used in conjunction with copper, iron, or chromel to create reliable thermocouples for temperature measurement.
• Strain Gauges: Its ability to maintain resistance under thermal load makes it perfect for sensing mechanical strain.
• Specialised Heating: Suitable for low-temperature heating elements where precise control is required.

All sizes are supplied on convenient 125g reels, providing a manageable quantity for laboratory prototyping, educational experiments, and professional electronic assembly.