Magdeburg Hemispheres
Product Code : SCL-CL-11888
Magdeburg Hemispheres (SKU SCL-CL-11888) are a pair of metal demonstration hemispheres that trap air when joined; once the air is pumped out, outside air pressure holds them together so firmly that pulling them apart becomes a real struggle. The set brings the classic seventeenth-century air-pressure experiment into the classroom. Science Lab Supplies, operating out of Ambala, India, can provide a single pair or several pairs to schools, colleges, contractors and distributors.
Specifications
Each detail of the metal Magdeburg hemispheres has its own row in the table below. In short, two hemispheres seal together to trap air, a vacuum pump draws the air out through the nozzle so low pressure holds them shut, and opening the valve lets air back in so the halves separate easily.
| Specification | Value |
|---|---|
| SKU | SCL-CL-11888 |
| Material | Metal (demonstration model) |
| Parts | Two hemispheres that trap air when joined |
| Air removal | Through the nozzle using a vacuum pump |
| Valve | Opened to let air in and balance the pressure |
| Holding force | Low pressure inside; outside air pressure holds the halves together |
| Demonstrates | Vacuum, air pressure and atmospheric force |
| Application | Physics classrooms and laboratories |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Magdeburg Hemispheres
Magdeburg hemispheres give a memorable, hands-on proof that the atmosphere exerts a large force on every surface. They suit CBSE/NCERT Class 8 science (Force and Pressure), Class 11 physics (mechanical properties of fluids) and physics classrooms and laboratories where vacuum and atmospheric pressure are explained.
- Class 8 science: showing that air exerts pressure in all directions.
- Class 11 physics: estimating the force of atmospheric pressure on the hemisphere area.
- Evacuating the sphere with a Hand Vacuum Pump that draws 15 cm³ per stroke.
- Showing how releasing the vacuum through the valve equalises pressure.
- Continuing the vacuum lesson with the Demonstration Device of an Alarm from a Clock Under a Bell, a glass cage with an electric bell and vacuum pump.
- History-of-science lessons on Otto von Guericke's original demonstration.
Standard Scope of Supply
The set consists of the two metal hemispheres with their nozzle and valve. A vacuum pump is needed to remove the air, and a suitable pump can be added to the same quotation if your laboratory does not already have one.
Packing, MOQ and Lead Time
You may ask for one pair for the demonstration bench or several pairs for group work. Each quotation lists the packing, delivery time and price for the quantity requested, and a hand vacuum pump or barometer can be quoted alongside on the same document.
Science Lab Supplies is registered as an exporter with an Importer-Exporter Code and can ship to buyers in Oman, the Philippines, Nepal, Bangladesh, Zambia and Rwanda. Science Lab Supplies is registered for GST (GSTIN 06ADEPJ0574F2ZU). Mention whether you also need a pump when you write through the contact page, or add both to the enquiry cart; the lab tender page covers formal tenders.
Frequently Asked Questions
Is a vacuum pump needed with the Magdeburg Hemispheres?
Yes. Air is removed through the nozzle with a vacuum pump. If your laboratory has no pump, request one on the quotation so the hemispheres can be used as soon as they arrive.
How are the hemispheres separated after the demonstration?
Open the valve so air flows back inside. Once the pressure inside and outside is balanced, the two halves come apart easily, with no force needed, ready for the next demonstration.
Who supplies the Magdeburg Hemispheres?
This apparatus reaches schools, colleges and contractors through Science Lab Supplies of Ambala, India, which can price it on its own or together with a vacuum pump and barometer for a full air-pressure lesson.
What concept does this apparatus teach?
It shows that the atmosphere exerts a strong pressure: when air is removed from inside, outside air pressure holds the hemispheres together until the valve is opened again.
Related Air Pressure and Vacuum Equipment
The hemispheres depend on a vacuum source, and air-pressure lessons continue with instruments that measure pressure. These Chemistry Lab, Physics Lab and Properties of Matter items supply the vacuum and extend the lesson to pressure measurement, and all of them can share one quotation.
- Hand Vacuum Pump with Pressure Gauge — 15 ml per stroke, displacing up to 725 ml of air, with a release valve and a gauge in cm and inches of mercury.
- Vacuum Pressure Pump — general-purpose pump rated at about 50 litres/min with an ultimate vacuum of 5 Pa.
- Microscale Vacuum Apparatus with Hand Pump — 10 cm high, 5 cm diameter bell jar for vacuum work at the student's own station.
- School Vacuum-Pump Set — chamber of 4.75 x 4.75 in at the top for boiling, fountain and atmospheric pressure demonstrations.
- Air Pump (Vacuum Pump with Aluminium Plate) — steel single-barrel pump on a wooden base with an aluminium plate and stop cock.
- Metal Barometer — barometer with a 90 mm base and a 57 mm dial field.
- Aneroid Barometer — dial barometer reading 960 to 1060 hPa (720 to 795 mmHg).
Browse the full Chemistry Lab range, the Properties of Matter range, or all school lab equipment.
Last updated: 9 October 2026
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