SWG Manganin Wire (100g) Spoolm

Product Code : SCL-AM-12109

The SWG Manganin Wire for Physics Lab (100g Spool) is a premium copper-manganese-nickel resistance alloy wire used for establishing highly stable electrical resistance parameters in educational and scientific setups. Engineered for physics educators and laboratory technicians, this precision wire ensures accurate evaluations of circuit networks without temperature-induced fluctuations.

Product Description

This high-quality resistance wire provides an ideal medium for exploring basic and advanced electrical principles. Manufactured from a specialized alloy consisting primarily of copper, manganese, and nickel, it exhibits an exceptionally low thermal coefficient of resistance. This unique characteristic prevents electrical resistance variations as the wire experiences temperature changes from current flow.

The product comes neatly wound on a heavy-duty plastic spool to minimize tangling and simplify dispensing during busy laboratory periods. It serves as an essential component for custom coil assemblies, Wheatstone bridge configurations, and standard verification tests within modern physics lab equipment inventories.

Key Features

• Near-Zero Temperature Coefficient: Maintains constant resistance despite temperature variations, ensuring precision results during thermodynamic and electrical testing.
• Premium Manganin Alloy Core: Composed of an optimized copper-manganese-nickel blend for superior longevity and consistent performance metrics.
• Standard Wire Gauge (SWG) Profile: Uniform cross-sectional diameter guarantees predictable resistance values per meter of wire length.
• Convenient 100g Spool: Packaged onto a sturdy reel to support smooth unspooling, clean cutting, and organized storage.
• Corrosion-Resistant Surface: The alloy formulation naturally resists long-term atmospheric oxidation to preserve terminal conductivity.
• Versatile Circuit Compatibility: Works flawlessly with standard benchtop power supplies, galvanometers, and rheostat assemblies.

Technical Specifications

What's Included in the Kit

• 1 x 100g Spool of SWG Manganin Resistance Wire
• 1 x Resistance-per-meter reference data chart

Applications / Uses

• Constructing standard reference resistors and custom shunts within laboratory environments.
• Demonstrating Ohm’s Law and verifying specific resistivity values during university physics experiments.
• Replacing worn slide-wires on classic meter bridges and potentiometer setups.
• Serving as a baseline consumable component in custom student science kits.
• Configuring precision voltage divider networks inside experimental electrical instruments.

How to Use the SWG Manganin Wire for Physics Lab

1. Calculate Required Length: Use the provided reference chart to determine the exact length of wire needed for your target resistance value.
2. Dispense and Cut: Unspool the wire carefully to avoid tight kinks, and cut the segment cleanly using heavy-duty wire snips.
3. Establish Terminal Contacts: Secure the exposed wire ends directly under the terminal screw heads or binding posts of your circuit assembly.
4. Energize the Circuit: Apply a low-voltage current across the wire to run your specific electrical measurement or calibration test.
5. Record Resistance Data: Utilize a digital multimeter or bridge setup to confirm the highly stable resistance profile of the manganin section.

Safety Note: Avoid passing currents that exceed the maximum thermal thresholds of the selected wire gauge, as extreme over-current can cause the wire to become hot to the touch.

Care & Maintenance

• Prevent Kinking: Do not twist the wire into sharp loops, as kinks alter the local cross-sectional area and corrupt precise resistance values.
• Dry Storage: Store the spool in a dedicated, low-humidity cabinet among other sensitive laboratory consumables to eliminate localized oxidation.
• Secure the End: Fasten the loose end of the remaining wire into the built-in spool slots after every lab session to prevent accidental unravelling.

Why Choose Science Lab Supplies

Science Lab Supplies is a premier manufacturer and global exporter of high-grade scientific laboratory instruments, STEM kits, and specialized didactic tools. Leveraging decades of manufacturing expertise, our production workflows follow stringent material selection and testing standards to guarantee reliable field performance. We offer seamless global logistical support, ensuring our products reach academic and industrial institutions efficiently.

Frequently Asked Questions

What makes Manganin wire unique for physics laboratory experiments?

Manganin wire features an exceptionally low temperature coefficient of resistance. This means its electrical resistance remains practically constant even when the wire warms up due to electrical current.

Is this Manganin wire insulated or bare?

This specific wire is provided as bare, uninsulated alloy wire, which makes it perfect for applications like slide-wire potentiometers, meter bridges, and direct terminal connections.

How do I accurately measure out a specific resistance using this spool?

You can consult the included reference chart to find the resistance value per meter for the specific gauge, measure the corresponding physical length, and cut it precisely.

Can I use this wire to build permanent heavy-duty resistors?

Yes, due to its long-term stability and resistance to aging, this manganin wire is widely used to construct high-accuracy shunt resistors and laboratory standard resistors.

What happens if the wire becomes kinked during setup?

A sharp kink can physically deform the wire, reducing its local cross-sectional area and causing a localized increase in resistance, which can distort your experimental data.

Ensure your department stays fully stocked with premium resistance materials by exploring our wide collection of laboratory consumables today.