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Hollow Cylinder (Transparent) for School Maths Lab
High-Clarity Shatterproof Acrylic: Constructed from optical-grade, impact-resistant transparent polymer, featuring a reinforced frame that allows for parallax-free observation of internal contents during displacement experiments and volumetric analysis.
Precision-Molded Watertight Design: Features a non-leaking, ultrasonic-welded base and permanent silk-screened metric graduations, ensuring accurate capacity readings and repeated institutional use without the risk of material clouding or measurement degradation.
₹380.00
Quick Answer: The Hollow Cylinder (Transparent) is a see-through cylindrical shell that can be filled with water, sand or small beads while the level of the contents stays visible. Maths labs use the transparent hollow cylinder to test V = πr²h, measure capacity and compare the cylinder with cones and spheres.
What Transparency Adds to Volume Work
An opaque container hides the one thing students need to see in a volume activity: how high the contents have risen. With a see-through cylinder the class can watch a pour fill the shape to one third, two thirds or the brim, and read the height against a ruler held alongside. That makes it easy to show that a cylinder’s volume grows in proportion to its height. Water filled to half the height is half the volume, because every horizontal slice has the same circular area πr².
The cylinder is the reference solid for two classic comparisons. A cone with the same radius and height empties into it three times before it is full. A sphere whose diameter equals the cylinder’s width and height fills two thirds of it, the result Archimedes valued so highly that it was reportedly marked on his tomb. With a clear wall, both fractions appear as a level partway up the cylinder rather than just a count of pours.
Students can also measure the internal diameter and height, calculate πr²h and check the answer by filling with water and pouring into a measuring cylinder, since 1 cm³ holds 1 mL. Differences between the two figures lead into a useful discussion of wall thickness and measurement error.
Specifications
| Item | Transparent hollow cylinder model |
| Form | See-through cylindrical shell for filling and pouring |
| Formulas taught | V = πr²h; curved surface area = 2πrh |
| Used with | Hollow sphere and cone models, measuring cylinder, ruler |
| Diameter, height, material and whether a lid is fitted | Confirm at enquiry |
Applications
- Testing V = πr²h against a capacity measured in millilitres
- Showing that volume is proportional to height by filling to marked levels
- Comparing a cone of equal base and height, which fills the cylinder one third of the way
- Showing the sphere-in-cylinder ratio of two thirds with a matching sphere
- Wrapping and unrolling a paper sleeve to show the curved surface as a rectangle 2πr wide
Care & Handling
- Clean the transparent hollow cylinder with mild soapy water and a soft cloth; abrasive pads scratch clear surfaces and hide the fill level.
- Dry the inside fully before storing so water marks do not cloud the wall.
- Keep it away from hot water and heaters unless the material is known to tolerate heat, since clear plastics can soften or craze.
Why Choose LabEquip
Schools usually pair this cylinder with the matching Hollow Sphere (Transparent) so the two-thirds relationship can be shown in one lesson. Both are in the LabEquip Mathematics School Lab Products range; for dimensions and quantities, reach the team through the LabEquip contact page.
Frequently Asked Questions
Why use a transparent cylinder instead of a plain tin?
Students can see the level of the contents at every stage. That shows fractions of the volume, such as a cone filling one third of the height, and lets the class read heights against a ruler instead of guessing when the container is full.
How do students check V = πr²h with it?
Measure the inside diameter and height, halve the diameter to get r, and calculate πr²h in cubic centimetres. Then fill the cylinder with water and pour it into a measuring cylinder. Because 1 cm³ equals 1 mL, the two numbers should be close.
How does the cylinder relate to a sphere?
A sphere that just fits inside a cylinder, touching the sides, top and bottom, has two thirds of the cylinder’s volume. Pouring the contents of a matching hollow sphere into the cylinder fills it to two thirds of its height.
Can the curved surface area be demonstrated?
Yes. Wrap a strip of paper once around the outside, mark where it overlaps, and unroll it. The strip is a rectangle whose length is the circumference 2πr and whose width is the height h, so its area gives 2πrh.
What should the cylinder be filled with?
Water gives the most accurate capacity reading and a level surface. Dry sand, rice or small beads are cleaner for demonstrations away from a sink. Avoid anything oily or sticky, which coats the inside and clouds the wall.
Is the cylinder useful below secondary level?
Yes. Younger students use it for capacity comparisons, such as ordering containers by how much they hold, and for reading scales in millilitres. The formula work follows in middle and secondary classes.
Last Updated: September 2026
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