Rheostat, Constantine (Eureka) Wire
Product Code : SCL-ES-11801
Quick Answer: The Rheostat, Constantine (Eureka) Wire is a sliding rheostat wound with constantan (Eureka) copper-nickel wire on a porcelain tube, with a spring-loaded brass slider. Models range from 15 cm to 50 cm long and 10 ohm to 500 ohm.
Last updated: October 2026
Key Features
- Constantan (Eureka) Cu-Ni alloy wire, approx. 55% copper and 45% nickel
- Non-porous porcelain tube core
- Brass slider contact with spring-loaded pressure for even friction
- End supports in moulded Bakelite or powder-coated die-cast metal
- 4 mm shrouded sockets or brass screw terminals
- Lengths 15 cm to 50 cm; 10 ohm to 500 ohm; 0.5 A to 10 A, by model
Technical Specifications
| Specification | Value |
|---|---|
| Resistance wire | Constantan (Eureka), Cu-Ni approx. 55% Cu, 45% Ni |
| Core | Porcelain tube |
| Slider | Brass, spring loaded |
| End supports | Bakelite or powder-coated die-cast metal |
| Terminals | 4 mm shrouded or brass screw terminals |
| Lengths | 15 cm to 50 cm |
| Resistance | 10 ohm to 500 ohm (model dependent) |
| Current rating | 0.5 A to 10 A (depends on wire gauge and winding) |
About This Product
A rheostat is placed in series in a circuit to vary the current, or connected as a potential divider to give an adjustable voltage, in experiments such as verifying Ohm’s law and plotting V-I graphs. Sliding the brass contact along the winding changes how much wire is in the circuit. Laboratories and colleges in Niger, Djibouti, Uruguay, Dominican Republic, Moldova and Cabo Verde can buy the Rheostat, Constantine (Eureka) Wire through an export order.
Frequently Asked Questions
What resistance values are available in the Rheostat, Constantine (Eureka) Wire?
Models cover 10 ohm to 500 ohm, in lengths from 15 cm to 50 cm, with current ratings from 0.5 A to 10 A depending on wire gauge.
Related: Electrostatics & Sound and Rheostat, Nichrome Wire, Groove Type.
For a quotation on the Rheostat, Constantine (Eureka) Wire, contact Educational Instrument.
