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Newton's Tube
Newton's Tube (Product Code: SCL1223/010) is a long, sealed glass tube used to show that light and heavy bodies fall together once air resistance is removed, in school and college physics demonstrations. At least 1,500 mm long, it holds a wedge, a piece of sponge and a 5 mm metal ball, and its lid carries a tap and an air-outlet connection for a vacuum pump. It is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India, as mechanics lab equipment.
Specifications
| Parameter | Detail |
|---|---|
| Tube | Transparent glass |
| Diameter | 30–100 mm |
| Length | Minimum 1,500 mm |
| Ends | One end closed; the other end with a sealed lid carrying a tap and an air-outlet connection |
| Objects inside | A wedge, a piece of sponge and a metal ball of 5 mm external diameter |
| Product code | SCL1223/010 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Newton's Tube Used For?
The demonstration runs in two stages. First, with the tube full of air, the teacher closes the tap, holds the tube upright and turns it over smoothly: the metal ball drops quickly while the sponge drifts down slowly, just as everyday experience suggests. Next, the air outlet is connected to a vacuum pump, the air is drawn out and the tap is closed before the tube is inverted again. This time the objects fall side by side, showing that without air resistance all bodies fall with the same acceleration.
Letting a little air back in and repeating shows the effect of air resistance returning step by step, which makes a strong closing question for the class. An evacuated glass tube must be handled with care: turn it in a controlled way, never knock it against the bench, keep students at a safe distance and wear eye protection while it is under vacuum. Wipe the glass clean before class so the falling objects are easy to see from the back of the room.
What to Specify When Ordering
- The tube diameter you need within the 30–100 mm range (the length is a minimum of 1,500 mm).
- Whether a vacuum pump and vacuum tubing should be quoted with the tube, as no pump is listed with it.
- The number of tubes and the delivery location, so packing for the glass can be planned.
OEM Manufacturer
Jain Scientific Equipments Private Limited, trading as ScienceLab, is the OEM (original equipment manufacturer) of the Newton's Tube and makes it at its own licensed factory at Saha, Ambala, Haryana, India. Because the tube comes from its maker rather than a trader, schools and distributors get quotations, packing advice and repeat orders straight from the source, and a replacement part can be requested if one is damaged — ask us. Read more on the about-us profile.
Related Lab Equipment
Items needed to evacuate the tube, plus alternatives for the same lesson:
- Vacuum Pump with Pressure Gauge — removes the air through the tube's outlet and shows the pressure reached.
- Vacuum Tubing — connects the air outlet to the pump.
- Vacuum Pump, Hand — a manual option for evacuating the tube.
- Guinea & Feather Apparatus — an alternative apparatus for the same free-fall demonstration.
- Apparatus for Demonstrating the Free Fall of Bodies — continues the topic of free fall in air.
Explore other items in the Lab Equipment category.
Frequently Asked Questions
What objects are inside the Newton's Tube?
The Newton's Tube contains a wedge, a piece of sponge and a metal ball of 5 mm external diameter. The contrast between the light sponge and the dense ball makes the effect of air resistance, and its removal, easy to see.
Is a vacuum pump supplied with the tube?
No pump is listed with the Newton's Tube. The tube connects through its tap and air-outlet connection to a separate vacuum pump, such as the Vacuum Pump with Pressure Gauge, using suitable vacuum tubing.
What diameter will the tube be?
The Newton's Tube is specified with a diameter of 30–100 mm and a minimum length of 1,500 mm. Tell us the diameter your syllabus or tender needs, and the exact dimensions will be confirmed in your quotation.
Can the demonstration be done without a vacuum?
Partly. With air inside, the Newton's Tube shows the sponge falling far more slowly than the metal ball, which demonstrates air resistance. The equal-fall result needs the air to be pumped out through the air outlet first.
What precautions apply to an evacuated glass tube?
Handle the evacuated Newton's Tube gently: turn it in a controlled way, avoid knocks and sudden temperature changes, keep observers at a safe distance and wear eye protection while the glass tube is under vacuum.
Who manufactures the Newton's Tube?
The Newton's Tube is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), the OEM, at its own licensed factory at Saha, Ambala, Haryana, India. Quotations for the tube, with or without a pump and tubing, come directly from the manufacturer.
Request a Quote
To price the Newton's Tube together with a pump and tubing, send your list to the manufacturer through our contact page or add everything to the enquiry cart.
Last updated: 24 September 2026
