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Apparatus for Demonstrating the Boil-Marriott Law
Apparatus for Demonstrating the Boil-Marriott Law (Product Code: SCL-379/011) is a gas-law demonstration unit used to show that the volume of a fixed mass of gas at constant temperature is inversely proportional to its pressure, in school and college physics classes. A horizontal transparent tube scaled 0–300 cm³ is read against a pressure gauge beside the gas tap, giving pairs of values for PV = constant. It is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Law demonstrated | Boyle–Mariotte law: for a given mass of gas at constant temperature, volume is inversely proportional to pressure (PV = constant) |
| Tube | Transparent, mounted horizontally |
| Volume scale | 0–300 cm³ |
| Tap | Gas tap that closes the tube |
| Pressure reading | Pressure gauge located next to the gas tap |
| Effective tube length | Selected by changing the position of the rubber stopper |
| Quantities measured | Volume and pressure of the enclosed gas as the pressure is changed |
| Product code | SCL-379/011 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Boyle's Law Apparatus Used For?
The apparatus lets a class test Boyle's law — called the Boyle–Mariotte law in many countries — with real numbers. Air is trapped in the transparent tube by closing the gas tap; the pressure is then changed step by step, and at each step the volume is read from the 0–300 cm³ scale and the pressure from the gauge. Multiplying each pair gives nearly the same product, and a graph of pressure against 1/volume comes out as a straight line.
Moving the rubber stopper sets the effective length of the tube, so the starting volume of trapped air can be chosen before a run. Make each change slowly and pause before reading, because compressing a gas warms it slightly and the law holds only at constant temperature; also make sure the tap is fully closed so no air escapes mid-series. As a Boyle law apparatus for schools and colleges in India and abroad, it turns a textbook formula into a measurement students can repeat themselves.
OEM Manufacturer
ScienceLab is the brand under which Jain Scientific Equipments Private Limited makes this gas-law apparatus as the original equipment manufacturer. Production takes place at the company's own licensed factory at Saha in Ambala, Haryana, from where units go directly to schools, colleges, institutions, dealers and importers.
Buying from the OEM means the team that builds the apparatus also handles your quotation, repeat orders and requests for replacement parts such as stoppers — ask us about them. More about the company is on the ScienceLab profile.
Related Laboratory Equipment
Other pressure and fluids apparatus that fits the same unit of work:
- Boyle's Law – Simple Type — a simpler alternative for the same gas law.
- Pascal's Sphere — shows pressure passing equally in all directions through a fluid.
- Pascal's Principle Demonstrator — a second demonstration of pressure transmission.
- Communication Vessel Apparatus — links liquid pressure to equal liquid levels.
Further physics demonstration units are listed in the Laboratory Equipment category.
Frequently Asked Questions
What does the Boil-Marriott Law apparatus demonstrate?
The Apparatus for Demonstrating the Boil-Marriott Law (SCL-379/011) demonstrates Boyle's law: for a given mass of gas at constant temperature, volume is inversely proportional to pressure, so PV stays constant. Students record matching volume and pressure readings to confirm it.
What volume range does the tube cover?
The transparent, horizontally mounted tube of the Apparatus for Demonstrating the Boil-Marriott Law (SCL-379/011) carries a volume scale from 0 to 300 cm³, and the volume of trapped gas is read directly from this scale at every pressure setting.
How is the gas pressure measured?
Pressure in the Apparatus for Demonstrating the Boil-Marriott Law (SCL-379/011) is read on a pressure gauge located next to the gas tap that closes the tube, so each volume reading can be paired with the pressure of the enclosed gas.
What is the rubber stopper for?
In the Apparatus for Demonstrating the Boil-Marriott Law (SCL-379/011), changing the position of the rubber stopper selects the effective length of the tube, which sets how much air is enclosed before the pressure and volume readings begin.
Who manufactures the Apparatus for Demonstrating the Boil-Marriott Law?
The Apparatus for Demonstrating the Boil-Marriott Law (SCL-379/011) is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), the OEM, at its own licensed factory in Saha, Ambala, Haryana, India. Quotations and repeat orders come straight from the manufacturer.
Is this the same as a Boyle's law apparatus?
Yes. The Boyle–Mariotte law is another name for Boyle's law, so the Apparatus for Demonstrating the Boil-Marriott Law (SCL-379/011) serves as a Boyle's law apparatus. Ask us through the contact page if your syllabus lists it under a different name.
Request a Quote
Send your enquiry for this gas-law apparatus via the contact page or add it to the enquiry cart. Every quotation is issued directly by the manufacturer in Ambala.
Last updated: 24 September 2026
