Gas Laws Demonstration Unit Manufacturer,Supplier and Exporter in India
Product Code : EL-HTTLP-9205
Jlab Export is a leading Gas Laws Demonstration Unit Manufacturer,and suppliers in India
Gas Laws Demonstration Unit (code EL-HTTLP-9205) is a small bench-top unit for investigating the first law of thermodynamics through the perfect gas law and the expansion of air. Two plastic vessels are joined by a large-bore pipe and valve, an integral pump pressurises one and evacuates the other, and each vessel carries its own thermocouple and pressure transducer. JLab assembles this two-vessel gas laws unit in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Format | Small-scale bench-top unit |
| Vessels | Two, joined by a large-bore pipe and valve |
| Air pump | Integral; pressurises one vessel and evacuates the other |
| Valves | Additional valves for isolation, venting to or from atmosphere and the combined arrangement |
| Construction | Vessels and pipework in impact-resistant plastic |
| Temperature sensors | Low-inertia thermocouple in each vessel |
| Pressure sensors | Individual pressure transducer for each vessel |
| Pressure limiting | Pressure switches limit the operating pressures |
| Quality check | Each gas laws unit is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 1 unit |
| Dispatch time | Usually 14–18 working days |
| Product code | EL-HTTLP-9205 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
Pressurise, Evacuate and Vent: The Valve Arrangements
Additional valves let each vessel be used on its own, vent to the atmosphere or draw air in from it, or be joined to the other so that the pressurised vessel vents into the evacuated one through the large-bore pipe. Pressure switches limit the operating pressures.
Applying the Perfect Gas Law to the Readings
For a fixed mass of air in a vessel of fixed volume, the perfect gas law pV = mRT reduces to p/T = constant, so a change in pressure goes with a proportional change in absolute temperature. The law holds only with absolute values: pressure measured from vacuum (a gauge reading plus atmospheric pressure) and temperature in kelvin, never in degrees Celsius.
When air is let out of the pressurised vessel quickly, the air that stays behind expands and does work pushing the rest out, so its internal energy and temperature fall; once the valve closes, it warms back towards room temperature at constant volume and its pressure rises again. The low-inertia thermocouples follow these fast temperature changes while the transducers log the matching pressures, so the first law can be checked against real readings.
Other Apparatus for Boyle, Charles and Gas Law Work
- Gas Law Apparatus — air compressed by a twist handle, with volume, temperature and pressure read from scales.
- Boyles Law Apparatus — J-shaped tube on a wooden board for the pressure and volume relationship.
- Charles Law Apparatus — glass tube and stirred beaker for estimating absolute zero from the expansion of gas.
On this site the unit is filed under Heat Transfer Through Lagged Pipe, within Heat Transfer Lab Equipment.
Request a Quote
Send the number of units and your delivery address through Add To Cart or the contact page, and JLab will reply with a quotation for the gas laws unit.
Last updated: 30 October 2026
