Lee's And Charlton's Apparatus
Product Code : LSK-H-11158
Lee's And Charlton's Apparatus (SKU LSK-H-11158) determines the relative thermal conductivity of thin layers of poorly conducting material by the disc method: a steam chest heats the specimen from above while a suspended brass slab below receives the heat. It suits B.Sc. heat practicals and engineering physics labs. The apparatus comes from the production line of Science Lab Supplies at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, where it is manufactured and dispatched directly to colleges, schools, tender contractors and distributors.
Specifications
Slab size, steam chest and support details for the Lee's disc set are listed one per row below. In short, an 11 cm brass slab 10.5 mm thick hangs on three strings from an annular ring on a heavy retort stand, with a 4.5 cm deep brass steam chest of the same diameter resting on it.
| Specification | Value |
|---|---|
| SKU | LSK-H-11158 |
| Slab | Cylindrical brass slab |
| Slab diameter | 11 cm |
| Slab thickness | 10.5 mm |
| Alternative slab | Iron cylindrical slab of the same size |
| Steam chest | Brass hollow cylinder of the same diameter |
| Steam chest depth | 4.5 cm |
| Steam connections | Inlet and outlet tubes on the steam chest |
| Thermometer holes | Drilled radially |
| Suspension | Eyelets on the slab, three strings from a stout annular ring |
| Support | Heavy retort stand holding the ring, with accessories |
| Thermometer | Not included |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for Lee's And Charlton's Apparatus
In Lee's disc method the specimen sits between the steam chest and the brass slab; once temperatures are steady, the slab's rate of cooling, measured separately, gives the heat flow and hence the conductivity of the specimen. The set is standard heat and thermodynamics lab equipment for degree-level practicals.
- B.Sc. physics practical: thermal conductivity of a bad conductor by Lee's method, reading slab and steam-chest temperatures on a Thermometer (with no Mercury) scaled -10 to 120 °C.
- Plotting the cooling curve of the brass slab, timed with a Digital Stopwatch that reads to 1/100 s.
- Engineering physics labs: comparing insulating specimens of different thickness under the same steam temperature.
- Holding thermometers steady beside the set with a Retort Stand with Boss Head and Clamp.
Steam and the brass parts get hot, so let the steam chest cool before handling it under supervision.
Standard Scope of Supply
The set includes the 11 cm brass slab with eyelets and three suspension strings, the stout annular ring, the 4.5 cm deep brass steam chest with inlet and outlet tubes, and the heavy retort stand with its accessories. An iron slab of the same size can be quoted instead. Thermometers are not included.
Packing, MOQ and Lead Time
Ask for a single apparatus for a teaching demonstration or a set for each group in a college heat lab; every quotation sets out packing, delivery time and price for that quantity. Thermometers and a stopwatch can be added to the same quotation.
Science Lab Supplies holds an Importer-Exporter Code and can ship to buyers in Tanzania, Uganda, the UAE, Saudi Arabia, Oman and the Philippines. Price requests can be sent from the contact page or collected in the enquiry cart, and formal bids are explained on the lab tender page.
Frequently Asked Questions
What is the difference between the brass and iron slab versions?
Both slabs are the same size, 11 cm in diameter and 10.5 mm thick. The standard set uses brass, and an iron slab can be specified instead. Mention your preference in the enquiry so the quotation lists the right version.
Is a thermometer included with Lee's apparatus?
No. The apparatus is supplied without a thermometer. Holes are drilled radially to take thermometers, so your laboratory needs suitable ones; they can be quoted together with the set.
What kind of specimen is tested?
The apparatus is meant for thin layers of materials that conduct heat poorly. A specimen matching the 11 cm diameter of the slab is placed between the steam chest and the slab for each run.
Is Science Lab Supplies the manufacturer or a trader?
Science Lab Supplies is the manufacturer. The brass slab, steam chest and stand assembly are produced in its factory at Saha, Ambala, which means buyers deal with the maker directly when they ask for a quote.
Related Heat Transfer and Calorimetry Apparatus
Conduction, insulation and calorimetry practicals share thermometers, steam supplies and heating set-ups with the disc method, so the following Heat range and physics items fit the same laboratory session and can readily be priced together on one quotation with this apparatus.
- Searle's Thermal Conductivity Apparatus — felt-lined wooden case with a removable front, for a steam-heated copper bar.
- Callendar and Barne's Apparatus (Continuous Flow) — two pots of thick brass sheet and a brass constant level tank on a stand.
- Joule's Calorimeter — bakelite top with holes for thermometer and stirrer, and two terminals to a heating coil.
- Thermal Insulation Apparatus — six felt pads for studying the effect of increasing insulation thickness.
- Apparatus for Changing the Thermal Conductivity — includes five alcohol thermometers reading -10 to 150 °C and a digital stopwatch.
- Conductivity Ring — gentle heating at the centre melts wax in the cups at each strip end.
Browse the full Heat range, the Physics Lab range for insulation and calorimetry apparatus, or all physics lab equipment.
Last updated: 9 October 2026