Charles Law Apparatus, Basic
Product Code : LSK-POM-11201
Charles Law Apparatus, Basic (SKU LSK-POM-11201) is a U-shaped glass tube with a plain limb, a graduated limb ending in a bulb and a third side limb, all held in a 1000 ml tall-form beaker with a stirrer, used to study how the volume of trapped air changes with temperature. It serves senior school and college physics and chemistry. From its factory at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, Science Lab Supplies manufactures the set and supplies schools, colleges, tender contractors and distributors directly.
Specifications
This basic gas-law set is described in full in the table. In short, a U-tube of about 15 mm diameter combines a 220 mm plain limb, a 120 mm graduated limb ending in a 37 mm bulb and a 185 x 6 mm third limb, all standing inside a 1000 ml tall-form beaker.
| Specification | Value |
|---|---|
| SKU | LSK-POM-11201 |
| Main tube | U-shaped glass tube, about 15 mm diameter |
| Plain limb | Wide bore, 220 mm long |
| Plain limb fitting | Rubber bung carrying a short length of glass tubing |
| Rubber tubing | Short length with two pinch clips, on the glass tubing |
| Graduated limb | 120 mm long |
| Graduation | 25 to 35 ml in 0.2 ml divisions |
| Bulb | 37 mm diameter, at the end of the graduated limb |
| Third limb | About 185 x 6 mm (length x bore), at right angles to the plane of the other two limbs |
| Beaker | Tall form, 1000 ml capacity, holding the whole tube |
| Stirrer | Included |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Charles Law Apparatus, Basic
A sample of air is trapped in the graduated limb, the beaker is filled with water and warmed in stages, and the stirrer keeps the temperature even. Reading the volume at each temperature lets students plot volume against temperature for a fixed mass of gas at constant pressure.
- NCERT Class 11 physics and chemistry: verifying Charles's law, with the water temperature read on a Thermometer (with no Mercury).
- B.Sc. practical: estimating the expansion coefficient of air at constant pressure.
- Keeping spare laboratory tubing such as the Rubber Tube (Laboratory) for the pinch-clip connection.
Warm the water gradually, stir before every reading, and handle the hot glass beaker with care.
Standard Scope of Supply
Each set contains the U-shaped glass tube with its plain, graduated and third limbs and 37 mm bulb, the rubber bung with short glass tube, a short rubber tube with two pinch clips, the 1000 ml tall-form beaker and the stirrer. A heat source and thermometer are not included.
Packing, MOQ and Lead Time
Ask for one set or a batch for a full practical class, and Science Lab Supplies will return a quotation showing the packing, delivery time and price for that number. Spare beakers, thermometers or tubing can be added to the same quote.
Since it holds an Importer-Exporter Code, Science Lab Supplies can ship to buyers in Ethiopia, Tanzania, Uganda, the UAE, Saudi Arabia and Oman. Write in with your quantity using the contact page, collect the set and its extras in the enquiry cart, or consult the lab tender page for government and institutional tenders.
Frequently Asked Questions
What is included with the Charles Law Apparatus, Basic?
Everything listed in the scope above: the U-tube with its three limbs and bulb, the bung, a rubber tube with two pinch clips, the 1000 ml tall-form beaker and the stirrer.
How is the graduated limb marked?
The graduated limb is 120 mm long and is marked from 25 to 35 ml in 0.2 ml divisions. It ends in a bulb of 37 mm diameter.
How does this basic model differ from the combined Charles Law apparatus?
This model uses a U-tube held in a 1000 ml beaker of water with a stirrer. The Charles Law Apparatus (Combined) instead uses a Jolly's air bulb linked to a glass mercury reservoir on a wooden stand with a 0–100 cm scale.
Who makes the basic Charles Law apparatus?
Science Lab Supplies makes it at its factory in Saha, Ambala, India, and sells it under its own name, so buyers deal with the producer directly on specification, packing and price.
Related Gas Law Apparatus
The gas-law items below cover pressure and volume, pressure and temperature, and kinetic-theory practicals that sit beside a volume and temperature experiment, giving a complete gas-laws bench that can be priced on one quotation with this basic set.
- Charles Law Apparatus (Combined) — metre rule graduated 0–100 cm x 1 mm, numbered in both directions.
- Boyles Law Apparatus, Advanced with Oil — transparent safety screen in front of a thick-walled glass tube; supplied without pump and oil.
- Bourdon Gauge — transparent back shows the gauge mechanism, with a thick black pointer on a white dial.
- Boyle's Law Apparatus — sealed syringe on wooden platforms, compressed by added masses.
- Apparatus Boyles Law Pressure Type — 80 cm tall unit supplied with a hand pump.
- Manometer Cylinder with Piston Temperature Meter — screw-type plunger, manometer scale in Pa and a digital thermometer.
- Kinetic Theory Model — piston in a wide tube vibrated by a motor that needs a 6 V DC supply.
Browse the full Properties of Matter range, the Heat range for expansion and calorimetry apparatus, or all physics lab equipment.
Last updated: 9 October 2026