Electromagnetic Driver for Sonometer
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Product Code : SCL-AM-12100
Electromagnetic Driver for Sonometer (SKU SCL-AM-12100) is a coil on a soft iron pole piece that turns an AC signal from a function or audio generator into an alternating magnetic field, setting a steel sonometer wire vibrating without touching it. This replaces hand plucking with steady, repeatable resonance for Class 11 and university wave practicals. Science Lab Supplies manufactures the driver at its Saha, Ambala factory, Plot 448, HSIIDC Industrial Area, India, and supplies schools, universities, tender contractors and distributors directly.
Specifications
The table below lists each technical detail of the driver. Briefly, an enamelled copper coil wound on a high-permeability soft iron pole sits in a ventilated ABS housing, accepts up to 6 V RMS through twin 4 mm sockets and rides on a pillar with 25 mm of height adjustment.
| Specification | Value |
|---|---|
| SKU | SCL-AM-12100 |
| Coil | High-density enamelled copper winding |
| Pole piece | High-permeability soft iron |
| Maximum input | 6 V RMS continuous |
| Signal source | External function or audio signal generator (AC) |
| Input sockets | Twin 4 mm insulated banana sockets |
| Height adjustment | 25 mm manual vertical travel on a sliding pillar |
| Housing | High-impact ABS with ventilation slots |
| Excitation | Non-contact, electromagnetic |
| Wire required | Ferromagnetic wire such as steel or iron |
| Working gap | About 2–3 mm between pole piece and wire |
| Patch cords | 2 x 4 mm banana plug cords, 1 m long |
| Support | Height-adjustable stand support clamp |
| Documentation | Experiment guide with frequency templates |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Sonometer Driver
Placed under a tensioned steel wire between the sonometer bridges, the driver keeps the wire vibrating at the generator frequency. Students adjust frequency, length or tension until resonance gives a large, steady amplitude, then read the result, a cleaner method than plucking for school physics lab equipment in India.
- CBSE Class 11 practical: frequency against length of a wire at constant tension, using SWG Steel Wire (100gm) on the sonometer.
- Class 11: length against tension at a fixed frequency to verify the laws of vibrating strings.
- B.Sc. waves: locating nodes and antinodes with paper riders and finding an unknown frequency, driven from an Audio-Frequency Generator.
Set the generator amplitude below 5 V and never exceed 6 V RMS, or the coil insulation can overheat. Brass, copper and nylon strings will not respond, as they are non-magnetic.
Standard Scope of Supply
Each driver is supplied with the main coil assembly in its ABS housing, a height-adjustable laboratory stand support clamp, two 1 m patch cords with 4 mm banana plugs and an experiment guide. The sonometer, steel wire and signal generator are not included and can be quoted separately.
Packing, MOQ and Lead Time
Quotes can be prepared for a single driver or for one per sonometer in a wave-physics lab. Every quotation states packing, delivery time and price for the quantity you name, and generators, sonometers or spare steel wire can be added to the same quote.
Science Lab Supplies, an Importer-Exporter Code holder, can ship to buyers in Nigeria, Kenya, Ghana, Ethiopia, Tanzania and Uganda. The business is registered under Udyam as a manufacturing enterprise (UDYAM-HR-01-0014546) and for GST (GSTIN 06ADEPJ0574F2ZU). Send requirements via the contact page or enquiry cart; for tenders, refer to the lab tender page.
Frequently Asked Questions
What kind of wire does the driver need?
It needs a ferromagnetic wire such as steel or iron, because the alternating magnetic field acts on magnetic material. It will not vibrate non-magnetic strings made of brass, copper or nylon.
Can it be plugged into a mains socket?
No. It must be fed from a low-voltage function or audio signal generator, kept within the 6 V RMS continuous limit, through the twin 4 mm sockets and the supplied patch cords.
Why use a driver instead of plucking the wire?
Plucking gives a decaying vibration with mixed harmonics. The driver supplies a continuous single-frequency force, so resonance and nodes stay steady long enough for accurate readings.
Is Science Lab Supplies the manufacturer or a trader?
Science Lab Supplies is the manufacturer. The driver is assembled in its own factory in Saha, Ambala, India, and buyers deal with that factory directly for pricing, delivery and any technical questions.
Related Sonometer and Wave Apparatus
The products below belong to the same sound and wave practicals as the driver, from sonometers and signal sources to tuning forks and resonance tubes, so a complete vibrating-string and resonance bench can be specified on one quotation from the Applied Mechanics and Physics Lab ranges.
- Sonometers — 110 x 10 x 8.5 cm wooden sonometer with steel cords of 0.4 and 0.8 mm and three movable bridges.
- Signal Generator — educational function generator that drives speakers and vibration generators directly.
- Vibration Generator — coil in a permanent-magnet field, maximum input 6 V / 1 A.
- Stationary Waves in a String Apparatus — wave generator, signal source, cord, 50–100 g masses and pulley.
- Tuning Fork Set — forks of 256, 320, 426.7 and 480 Hz on a wooden resonance box.
- Resonance Apparatus Brass Pipe — air-column resonance for relating frequency and wavelength.
- Electromagnet U shape Two Coils — soft iron U-core with two coils, 4–6 V DC.
Browse the full Applied Mechanics range, the Physics Lab range for sound and wave apparatus, or all physics lab equipment.
Last updated: 9 October 2026
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