Measuring Vapor Apparatus (Product Code: SLE/H/20) is a high-pressure steam apparatus in which water is heated inside a closed pressure chamber at constant volume, so that liquid and vapour settle into equilibrium and the steam pressure can be measured across a temperature range of 100–250 °C. From those readings, students determine the heat of vaporisation at various temperatures and study the behaviour of real gases and vapours. It is intended for college and university thermodynamics laboratories and is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, a laboratory instruments supplier in India serving international markets as well.
| Parameter | Detail |
|---|---|
| Type | High-pressure steam apparatus |
| Operating principle | Water heated in a closed pressure chamber at constant volume |
| Steam pressure measurement range | 100–250 °C |
| Phase behaviour | Typical equilibrium states between gas and liquid phases can be set up |
| Investigations | Real gases and vapours; vapour pressure as a function of temperature; heat of vaporisation at various temperatures |
In a standard experiment the chamber is heated in stages, and at each stage the class waits for liquid and vapour to reach equilibrium before recording the temperature and the steam pressure. Repeating this across the 100–250 °C range produces a vapour-pressure curve. Plotting the natural logarithm of pressure against the reciprocal of absolute temperature turns that curve into a near-straight line whose slope, through the Clausius–Clapeyron relation, gives the heat of vaporisation; comparing slopes over different parts of the range shows how that value changes with temperature.
Because the chamber works above atmospheric pressure and at high temperature, the apparatus belongs in supervised college or university sessions. Follow the operating instructions for filling and heating, wear eye protection, and let the unit cool and depressurise fully before any handling. It fits well into physics lab equipment for thermodynamics and heat-engine courses, giving students measured data on real, non-ideal vapour behaviour.
Jain Scientific Equipments Private Limited builds this steam apparatus in Ambala, Haryana, and supplies it under its ScienceLab trade name to teaching and training laboratories. See our company profile for more about the company.
Apparatus that supports a thermodynamics and pressure-measurement syllabus:
Further apparatus is listed under Heat.
Over what temperature range can steam pressure be measured?
From 100 to 250 °C, with water heated in the closed chamber at constant volume.
What quantities can students determine?
Vapour pressure as a function of temperature and, from it, the heat of vaporisation at various temperatures.
Why is the chamber kept at constant volume?
In a sealed chamber the liquid and its vapour reach equilibrium, so the measured pressure depends on temperature alone — the condition needed for a clean vapour-pressure curve.
Is it suitable for school classes?
It is better suited to supervised college and university work because it operates at high temperature and above atmospheric pressure.
How is pressure read, and what power supply is needed?
Our listing does not give the gauge type or electrical requirements. Please contact us for the full datasheet before ordering.
Can a calibration certificate be supplied?
Calibration paperwork is not part of the standard listing; discuss any requirement with us through the contact page.
Do you ship to institutions outside India?
Yes, we supply universities and distributors in India and international markets; warranty terms are confirmed with each quotation.
To discuss the Measuring Vapor Apparatus for your laboratory, use our contact page or add it to the enquiry cart.
Last updated: 24 September 2026