Magdeburg Hemispheres
Product Code : LSK-POM-11193
Magdeburg Hemispheres (SKU LSK-POM-11193) are a pair of concave metal cups with handles and a stop cock that, once the air between them is pumped out, are held together by atmospheric pressure. They demonstrate air pressure in school science and college physics. Science Lab Supplies is the manufacturer, producing them at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, for direct supply to schools, colleges, tender contractors and distributors.
Specifications
Below, the hemisphere pair is broken down specification by specification. In short, two concave cups of 62 mm or 75 mm diameter, made in aluminium with brass as an alternative, are fitted with handles and a stop cock so that the space inside can be evacuated and sealed.
| Specification | Value |
|---|---|
| SKU | LSK-POM-11193 |
| Parts | Two concave cups (hemispheres) |
| Material | Aluminium |
| Alternative material | Brass |
| Diameter options | 62 mm or 75 mm |
| Handles | Provided |
| Valve | Stop cock |
| Demonstrates | Pressure of the atmosphere |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Magdeburg Hemispheres
After the cups are pressed together and the air removed through the stop cock, students try to pull them apart by the handles and feel how strongly the outside air pushes them together. The pair anchors Class 8 lessons on atmospheric pressure and is simple school physics lab equipment in India to use.
- NCERT Class 8 (Force and Pressure): showing that air exerts pressure, with the air removed by the Air Pump (Vacuum Pump with Aluminium Plate).
- Class 11 (Mechanical Properties of Fluids): estimating the holding force from atmospheric pressure and the cup area.
- Comparing the 62 mm and 75 mm sizes to show that a larger area gives a larger holding force.
- Linking to weather lessons with an Aneroid Barometer that reads 960–1060 hPa.
Open the stop cock to let air back in before separating the cups, and do not let students jerk the halves apart, as they can part sharply.
Standard Scope of Supply
Each set consists of the two concave hemispheres in the diameter ordered, 62 mm or 75 mm, with handles and a stop cock fitted, in aluminium or, if requested, brass. A vacuum pump and connecting tubing are not included and can be added to the same quotation.
Packing, MOQ and Lead Time
Prices can be requested for a single pair for the teacher's demonstration or for several pairs so that groups can try the pull test themselves. Science Lab Supplies quotes the packing, delivery time and price for the quantity and size you choose, and a pump can be listed alongside.
As the holder of an Importer-Exporter Code, Science Lab Supplies can ship to buyers in Vietnam, Malaysia, Peru, Egypt, Iraq and Nigeria. Tell the team your preferred diameter and metal on the contact page, save the item in the enquiry cart, or use the lab tender page for public procurement.
Frequently Asked Questions
What sizes and metals are the Magdeburg Hemispheres made in?
The cups are made in 62 mm or 75 mm diameter. Aluminium is the standard material and brass hemispheres are also available; state your choice of size and metal when you ask for a quotation.
How are the hemispheres evacuated?
The cups are pressed together and the air is drawn out through the stop cock with a vacuum pump. Closing the stop cock keeps the low pressure inside, so the outside air holds the halves together.
How are the cups separated after the demonstration?
Open the stop cock so that air flows back in. Once the pressure inside equals the pressure outside, the two hemispheres come apart easily by hand without any force.
Is Science Lab Supplies a manufacturer of this item?
Yes. Science Lab Supplies manufactures the hemispheres on its own premises in Saha, Ambala, India, and every quotation for them is issued by the producing company itself.
Related Air Pressure and Vacuum Apparatus
These items share the air-pressure theme, drawn from the Properties of Matter, Physics Lab, Chemistry Lab and biology ranges: pumps to evacuate the cups, other vacuum demonstrations and an instrument that measures atmospheric pressure, so a full air-pressure lesson can be equipped from one quotation.
- Magdeburg Hemispheres (metal, nozzle type) — air is removed through a nozzle and the halves separate once the valve is opened.
- Portable Diaphragm Type Vacuum Pump cum Air Compressor, Oil Free, Light Weight — portable oil-free pump that also works as an air compressor.
- Bell Experiment Apparatus — bell jar whose electric bell runs on 3 to 6 volts from a battery or transformer.
- School Vacuum-Pump Set — shows hot water boiling again after the chamber is pumped down.
- Metal Barometer — barometer with a 90 mm base diameter and a 57 mm field.
- Kinetic Theory Apparatus — models gas behaviour, including the thinning of air with altitude.
- Human Lung Model in Bell Jar — pulling the rubber diaphragm lowers the pressure so the balloon lungs fill.
Browse the full Properties of Matter range, the Chemistry Lab range for barometers and vacuum items, or all physics lab equipment.
Last updated: 9 October 2026