Wimshurst Influence Machine
Product Code : SCL-PL-12310
Wimshurst Influence Machine (SKU SCL-PL-12310) is an electrostatic generator that uses electrostatic induction to separate charges continuously and collect them on opposite electrodes, producing high-voltage sparks for classroom demonstrations. It suits electrostatics lessons in secondary school and college. Science Lab Supplies manufactures the machine on its shop floor at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, and its quotations go straight to schools, colleges, tender contractors and distributors.
Specifications
Each electrical and mechanical figure for the Wimshurst machine sits in its own table row. In short, two counter-rotating insulated 31 cm discs carry metal sectors past neutralising brushes, and two Leyden jars store the charge at a potential of 75,000 V, so it must be treated as high-voltage apparatus.
| Specification | Value |
|---|---|
| SKU | SCL-PL-12310 |
| Principle | Electrostatic induction (influence machine) |
| Discs | Two counter-rotating insulated discs |
| Disc diameter | 31 cm |
| Disc sectors | Metal |
| Brushes | Neutralising brushes |
| Charge storage | Two Leyden jars (the cylindrical tubes) |
| Potential | 75,000 V |
| Short-circuit current | 7 mA |
| Spark length | 2 cm |
| Spark gap in dry air | 75 mm |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Wimshurst Influence Machine
Turning the discs builds up opposite charges on the two electrodes until a spark jumps the gap, giving a vivid picture of charge separation, capacitance and discharge. As school physics lab equipment in India for electrostatics, the machine pairs well with discharge spheres, electroscopes and charge-distribution apparatus.
- CBSE/NCERT Class 12 physics (electric charges and fields; capacitance): charging by induction and the Leyden jar as a capacitor, compared with the capacitors of the Capacitor Set.
- Class 8–10 science: static electricity, sparks and the idea of lightning, after charging rods and the electroscope from the Electricity EL2+ Set.
- B.Sc. electrostatics demonstrations: dielectric breakdown of air across a spark gap.
Electrostatic demonstrations work more reliably in dry air; the 75 mm spark gap applies to dry air.
Standard Scope of Supply
The machine is supplied as a single unit with its two counter-rotating insulated discs carrying metal sectors, the neutralising brushes, two Leyden jars for storing charge and the spark electrodes as described above. Any optional accessories, such as a discharge sphere or electroscope, are listed separately on the quotation.
Packing, MOQ and Lead Time
A quotation can be requested for one machine for a demonstration lab or for several institutions at once, and it states the packing, delivery time and price for that quantity. Other electrostatics apparatus, from friction rods to a Van de Graaff generator, can be added to the same enquiry.
Science Lab Supplies is registered as an exporter with an Importer-Exporter Code, so it can ship to buyers in Zambia, Rwanda, South Africa, Qatar, Sri Lanka and Vietnam. To price one machine or a district order, contact the factory through the contact page or the enquiry cart; tender submissions go via the lab tender page.
Frequently Asked Questions
Is the Wimshurst machine dangerous?
It produces a potential of 75,000 V and the Leyden jars store charge after turning stops. Demonstrations should be run by a teacher, the electrodes discharged before touching, and anyone with an implanted medical device kept away.
What spark does it produce?
The spark length is 2 cm and the spark gap in dry air is 75 mm, with a short-circuit current of 7 mA at a potential of 75,000 V across the electrodes.
Is Science Lab Supplies the manufacturer or a trader?
The discs, Leyden jars and frame are put together in the company’s factory at Saha, Ambala, so Science Lab Supplies is the manufacturer of this machine and buyers deal with the maker directly for quotations.
Which classes use it?
It supports electrostatics demonstrations from middle-school static electricity up to Class 12 charges and capacitance, and college demonstrations of spark discharge.
Related Electrostatics Apparatus
These Physics Lab and Chemistry Lab items belong to the same electrostatics topic: a second Wimshurst model and a belt-type generator, a discharge sphere, charge-distribution and electroscope apparatus, friction rods and a variable capacitor, so a complete demonstration set can be built up and ordered on one quotation.
- Wimshurst Machine — belt-driven plates giving sparks of up to 50 mm, with no electrical power required.
- Van De Graaff Generator — conducting sphere on a pillar, charged by a motor-driven rubber belt.
- Discharge Sphere — polished stainless steel sphere on a 41 cm rod.
- Apparatus for Distributing Electric Charges — four metal spheres on insulating handles and a 200 mm gold leaf electroscope.
- Electrostatics Apparatus Set — 30 mm conducting spheres, electrode vessels, bells and chains.
- Electrostatics Friction Rods Set — 12 x 200 mm glass and ebonite rods.
- Electroscope — sheet metal case on an insulated base with sliding glass panels.
- Parallel-Plate Capacitor — 20 cm plates with adjustable spacing.
Browse the full Physics Lab range or all physics lab equipment.
Last updated: 22 October 2026
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