Bare Eureka (Constantan) Wire – 24 SWG, 0.55mm, 125g Reel

This high‑quality Bare Eureka (Constantan) Wire is supplied on a 125g reel and manufactured to 24 SWG (0.55mm diameter). Made from a dependable copper‑nickel alloy, this wire features a low temperature coefficient of resistance, making it ideal for constructing resistance coils and supporting a variety of physics and electronics experiments in school laboratories.

Its stable resistance characteristics ensure consistent results across different temperatures, providing students with reliable data for practical investigations and coursework experiments.

Key Features

• 24 SWG wire with a 0.55mm diameter
• Supplied on a 125g reel for easy handling
• Manufactured from Eureka/Constantan copper‑nickel alloy
• Low temperature coefficient ensures stable resistance values
• Ideal for making resistance coils and circuit components
• Durable and flexible for repeated classroom use

Ideal for School Science Lessons

Perfect for KS3, GCSE, and A‑Level physics, this Eureka wire is suitable for a wide range of electrical investigations. Its predictable and stable resistive behaviour makes it ideal for experiments focused on understanding resistance and electrical circuits.

• Constructing resistance coils for measurement activities
• Investigating length vs resistance relationships
• Exploring electrical behaviour of different conductive materials
• Supporting Ohm’s Law and I‑V characteristic investigations
• Providing accurate and consistent results for assessed practicals

Stable, durable, and versatile, this 24 SWG Eureka wire is an essential material for delivering high‑quality electrical and physics practicals in school laboratories.