SWG Manganin Wire (100g) Spoolm

Product Code : SCL-AM-12109

SWG Manganin Wire (100g) Spoolm (SKU SCL-AM-12109) is a 100 g spool of bare manganin resistance wire, a copper-manganese-nickel alloy whose resistance barely changes with temperature. Physics teachers, B.Sc. students and laboratory technicians cut it to length for standard resistors, bridge wires and resistivity experiments. Science Lab Supplies supplies it from Ambala, India to schools, colleges, training institutes, tender contractors and distributors.

Specifications

Each specification of the wire appears as a row in the table below. Summed up, it is an uninsulated alloy of roughly 84% copper, 12% manganese and 4% nickel, drawn to a uniform Standard Wire Gauge profile and wound on a sturdy spool, with a resistance-per-metre chart to help cut accurate lengths.

Applications and Experiments for the SWG Manganin Wire

Because manganin keeps a steady resistance as it warms under current, a measured length gives a dependable known resistance. That makes the spool a working consumable for Ohm's law, resistivity and bridge practicals, and a practical stock item from a physics instruments supplier in India for school and college labs.

• Class 12 physics: finding the resistivity of a wire and verifying Ohm's law, for example alongside the Apparatus for Studying the Dependence of Electrical Resistance.
• Replacing worn wires on meter bridges and potentiometers.
• B.Sc. practicals: making standard resistors and shunts, then checking them on a Portable Wheatstone Bridge Apparatus Circuit Board.
• Building voltage-divider networks for electrical experiments.

Avoid sharp kinks, which change the local cross-section and the resistance, and keep currents low enough that the wire does not get hot.

Standard Scope of Supply

Each pack holds one 100 g spool of SWG manganin resistance wire together with a resistance-per-metre reference chart for working out the length to cut. Wire snips, terminals and measuring instruments are not part of the pack and can be added to the quotation separately.

Packing, MOQ and Lead Time

You may request a price for one spool or for a stock of spools for several laboratories. Science Lab Supplies confirms packing, delivery time and price for that quantity on the quotation, and the required gauge can be stated in your enquiry, together with any bridges or resistance boxes.

Registered with an Importer-Exporter Code, Science Lab Supplies is able to ship to buyers in the Philippines, Nepal, Bangladesh, Zambia, Rwanda and South Africa. Reach the team through the contact page, collect items in the enquiry cart, or follow the lab tender page for tender submissions.

Frequently Asked Questions

What makes manganin wire useful in physics experiments?
Manganin has an exceptionally low temperature coefficient of resistance, so its resistance stays practically constant even when the wire warms slightly from the current passing through it during a measurement.

Is the SWG Manganin Wire (100g) Spoolm insulated?
No. It is bare, uninsulated alloy wire, which suits slide wires on meter bridges and potentiometers and direct connections under terminal screws. Keep bare turns from touching each other in a coil.

How do I cut a length for a given resistance?
Look up the resistance per metre for your gauge on the supplied chart, divide the resistance you need by that figure, and cut the resulting length cleanly. Confirm the value with a multimeter or bridge.

Who supplies the SWG Manganin Wire (100g) Spoolm?
Science Lab Supplies supplies it from Ambala, India. The spool can be quoted by itself or together with meter bridges, potentiometers, resistance boxes and other electricity apparatus on one quotation for a school or college laboratory.

Related Resistance Apparatus and Lab Wires

These Electrical and Electronics and Applied Mechanics products either use resistance wire directly, such as bridges and potentiometers, or are companion 100 g wires and manganin-wound standards, so a full set of resistance practicals can be priced together on one quotation for the laboratory.

• Meter Bridge or Wheatstone Bridge With Pencil Jockey — four-gap copper-strip bridge with 24 SWG constantan wire on a metre scale.
• Potentiometer with Jockey Pencil — wooden base with brass blocks, 4 mm sockets and a 100 cm scale.
• Pencil Jockey — bakelite-handled contact with a lock-type terminal for bridges and potentiometers.
• Resistance Coil 1 Ohm — non-inductive manganin coil, ±1%, with 4 mm binding posts.
• Resistance Box Plug Type (Constantan / Manganin Coil) — plug box with manganin coils at ±0.02% to ±0.05%.
• DCC Copper Wire for Physics Lab (100gm Spool) — double cotton covered copper wire for coils.
• Brass Wire (100gm) Physics Lab — 65/35 copper-zinc alloy wire.
• SWG Steel Wire (100gm) — 100 g of steel wire for material-property work.

Browse the full Applied Mechanics range, the Electrical and Electronics range for bridges and resistance boxes, or all physics lab equipment.

Last updated: 9 October 2026