Gay-Lussac's Law

Product Code : SLE/EA/27

Gay-Lussac's Law (Product Code: SLE/EA/27) is a bench-mounted apparatus used to show how the pressure of a fixed volume of air rises with temperature in engineering thermodynamics and physics laboratories. Students heat the air in a low-pressure vessel surrounded by an insulated heater under electronic control, then read absolute pressure, two air temperatures and their average on a digital display. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM and engineering lab equipment manufacturer, at its own factory in Ambala, India.

Specifications

ParameterDetail
MountingBench-mounting, with a back plate that holds the vessel
VesselLow-pressure vessel holding a fixed volume of air
HeatingInsulated heater around the vessel, controlled by an electronic temperature controller
Controller sensorThermocouple measuring the heater surface temperature
Air temperatureTwo thermocouples measuring the air inside the vessel
Pressure measurementPressure transducer measuring the pressure of the heated air
DisplayDigital display of absolute pressure, both air temperatures and their average
VentingHand-operated valve at the bottom of the vessel to normalise the air to ambient conditions
Working gasNormal clean, dry air (behaves as an ideal gas over the pressure range used)
Product codeSLE/EA/27
ManufacturerJain Scientific Equipments Pvt Ltd (ScienceLab) — OEM
Country of originIndia (made in Ambala, Haryana)

What Is the Gay-Lussac's Law Apparatus Used For?

Gay-Lussac's law, often called the pressure law, states that for a fixed mass of gas held at constant volume, pressure is directly proportional to absolute temperature. With this apparatus, students first open the hand-operated valve at the bottom of the vessel to bring the trapped air to ambient conditions, close it, and set the electronic controller for the temperature range the experiment needs. As the insulated heater warms the air, they record pressure from the transducer against the average of the two air thermocouples, then plot the results to prove the law.

Converting the readings to kelvin gives a straight line through the origin, while extending a plot of pressure against Celsius temperature back to zero pressure gives an estimate of absolute zero — a classic extension exercise. Ordinary clean, dry air is used because it behaves as an ideal gas over the pressure range of this equipment, so no special gas supply is needed. The unit suits engineering thermodynamics courses as well as colleges looking for advanced physics lab equipment in India.

OEM Manufacturer

Jain Scientific Equipments Private Limited trades as ScienceLab and is the OEM (original equipment manufacturer) of this Gay-Lussac's Law apparatus, which it makes at its own licensed factory at Saha, Ambala, Haryana, India. Dealing with the manufacturer directly helps when you need matching gas-law equipment for several benches, a repeat order for a later session or advice on spare parts — ask us and we will guide you. Institutions, dealers and importers are quoted factory-direct. Company background is on the ScienceLab profile.

Related Thermodynamics & Heat Transfer Lab Equipment

These gas-law and temperature-measurement items support the same practical sessions.

More thermodynamics apparatus is listed in the Thermodynamics & Heat Transfer Lab Equipment category.

Frequently Asked Questions

What does the Gay-Lussac's Law apparatus measure?
The Gay-Lussac's Law apparatus measures the absolute pressure of the heated air with a pressure transducer and its temperature with two thermocouples; a digital display shows the pressure, both air temperatures and their average. A further thermocouple on the heater surface feeds the temperature controller.

Why does the Gay-Lussac's Law apparatus use ordinary air?
The Gay-Lussac's Law apparatus uses normal clean, dry air because air behaves as an ideal gas over the range of pressures used in this equipment, so results follow the pressure law closely without any special gas supply.

What is the valve at the bottom of the Gay-Lussac's Law vessel for?
The hand-operated valve at the bottom of the Gay-Lussac's Law apparatus vessel lets students normalise the trapped air to ambient conditions before a run, so each test starts from room pressure and temperature.

Can students choose the temperature range on the Gay-Lussac's Law apparatus?
Yes. Students set the electronic temperature controller of the Gay-Lussac's Law apparatus for the range of temperatures needed during the experiment, and the insulated heater around the vessel warms the fixed volume of air through that range while they record the pressure changes.

Who manufactures the Gay-Lussac's Law apparatus?
The Gay-Lussac's Law apparatus (SLE/EA/27) is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), the OEM, at its own licensed factory at Saha, Ambala, Haryana, India, and it is supplied factory-direct to institutions, dealers and importers.

Is a calibration certificate available for the Gay-Lussac's Law apparatus?
Calibration-certificate availability for the Gay-Lussac's Law apparatus, including its pressure transducer and thermocouples, should be discussed with us before you order. Please ask through the contact page so the answer is included with your quotation.

What should a Gay-Lussac's Law apparatus quotation request include?
A quotation request for the Gay-Lussac's Law apparatus should state product code SLE/EA/27, the number of units, whether the companion Boyle's Law apparatus is also needed, and the delivery destination in India or in international markets.

Request a Quote

For a Gay-Lussac's Law apparatus quotation direct from the manufacturer, write to us through the contact page or place the item in the enquiry cart.

Last updated: 24 September 2026

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