Constantan Wire 50g Reel Manufacturer,Supplier and Exporter in India
Product Code : EL-P-10788
Quick Answer: Constantan Wire 50g Reel is constantan resistance wire, 56% copper and 44% nickel, supplied on a 50 g reel and listed in diameters from 0.27 mm to 1.22 mm (SWG 32 to 18).
Last updated: October 2026
Key Features
- Constantan resistance wire
- 56% copper and 44% nickel
- 50 g reel
- Listed in diameters from 0.27 mm to 1.22 mm (SWG 32 to 18)
- Resistance per metre from 0.42 to 8.31 Ω across the listed sizes
- Approximate length on a 50 g reel from 4.7 m to 94 m
Technical Specifications
| Specification | Value |
|---|---|
| Composition | 56% copper, 44% nickel |
| Reel | 50 g |
| Diameter 1.22 mm (SWG 18) | 0.42 Ω/m; approx. 4.7 m on a 50 g reel |
| Diameter 0.91 mm (SWG 20) | 0.747 Ω/m; approx. 8.5 m on a 50 g reel |
| Diameter 0.71 mm (SWG 22) | 1.234 Ω/m; approx. 14.1 m on a 50 g reel |
| Diameter 0.56 mm (SWG 24) | 1.997 Ω/m; approx. 22.7 m on a 50 g reel |
| Diameter 0.46 mm (SWG 26) | 2.987 Ω/m; approx. 34.0 m on a 50 g reel |
| Diameter 0.38 mm (SWG 28) | 4.413 Ω/m; approx. 50 m on a 50 g reel |
| Diameter 0.32 mm (SWG 30) | 6.288 Ω/m; approx. 71 m on a 50 g reel |
| Diameter 0.27 mm (SWG 32) | 8.31 Ω/m; approx. 94 m on a 50 g reel |
About This Product
Constantan is a resistance alloy whose resistance changes very little with temperature, so it is the usual wire for resistance experiments. Students use lengths of it to show that resistance rises with length and falls as the wire gets thicker, to test Ohm's law, and to build simple variable resistors and heating elements. The table of resistance per metre for each diameter lets them calculate the resistance of a given length before measuring it.
Frequently Asked Questions
Q1. What is Constantan Wire 50g Reel made of?
It is constantan resistance wire, 56% copper and 44% nickel, supplied on a 50 g reel.
Q2. What diameters are listed?
The listed diameters are 1.22, 0.91, 0.71, 0.56, 0.46, 0.38, 0.32 and 0.27 mm, which are SWG 18, 20, 22, 24, 26, 28, 30 and 32.
Q3. How much wire is on a reel?
It depends on the diameter: approximately 4.7 m for 1.22 mm up to 94 m for 0.27 mm.
Related: Physics Teaching Aids, Multimeter, Digital Voltmeter.
For a quotation on the Constantan Wire 50g Reel, contact School Lab Equipment India.