Spherometer
Product Code : LSK-PL-10374
Spherometer (SKU LSK-PL-10374) is a brass three-legged instrument for accurate measurement of the radius of curvature of spherical lenses. A 1 mm pitch screw and a 100-division disc give readings to one hundredth of a millimetre, which makes it a regular item in Class 11 and college physics practicals. Science Lab Supplies manufactures it in-house in Saha, Ambala, India (Plot 448, HSIIDC Industrial Area) and supplies schools, colleges, tender contractors and distributors directly.
Specifications
A three-pronged brass table stands on three pointed stainless steel legs. One prong carries a vertical main scale reading 10–0–10 mm, and the central screw has a 1 mm pitch with a 40 mm brass dial head. The micrometer scale on the brass disc has 100 divisions.
| Parameter | Value |
|---|---|
| SKU | LSK-PL-10374 |
| Frame | Three-pronged brass table, three pointed stainless steel legs |
| Main scale | Vertical, 10–0–10 mm |
| Disc scale | Brass disc, 100 divisions |
| Pitch | 1 mm (least count 0.01 mm) |
| Dial head | Brass, 40 mm diameter |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Spherometer
The spherometer finds the radius of curvature of a lens or curved mirror from the height of the curved surface above the plane of its three legs. It is a listed experiment in the NCERT Class 11 physics lab manual and supports lens and interference practicals at B.Sc. level.
- Class 11 physics: radius of curvature of a given spherical surface.
- Class 12 physics: measuring the radii of a lens for the lens maker's formula.
- B.Sc. optics: radius of curvature of the plano-convex lens used in Newton's rings.
- Teaching pitch, least count and backlash of a screw-based instrument.
Standard Scope of Supply
The spherometer is supplied as a single instrument: brass table with its three stainless steel legs, main scale, central screw and 100-division brass disc. A flat glass plate and the lens to be measured are not part of the item and can be requested on the quotation.
Packing, MOQ and Lead Time
Tell us whether you need a single spherometer or one for every pair of students, and we will return a quotation showing the packing, delivery time and price for that number. School physics lab equipment in India, such as screw gauges and calipers, can be quoted at the same time.
Science Lab Supplies holds an Importer-Exporter Code as a registered exporter, so it can ship to buyers in Zambia, Rwanda, South Africa, Qatar, Sri Lanka and Vietnam. Use the contact page to write to us, the enquiry cart to list several items, or the lab tender page for tender enquiries.
Frequently Asked Questions
What is the least count of this spherometer?
The screw has a 1 mm pitch and the disc has 100 divisions, so one disc division equals 0.01 mm.
What is a spherometer used for?
It is used for accurate measurement of the radius of curvature of spherical lenses and other curved surfaces, by measuring how far the centre of the surface rises or falls relative to the three legs.
Is Science Lab Supplies the manufacturer or a trader?
Manufacturer. The spherometer is produced at our plant in the HSIIDC Industrial Area, Saha, Ambala, India, and you receive the quotation from the maker rather than from a distributor.
Is a glass plate included?
The listed item is the spherometer itself. If you need a flat glass plate for the zero reading, mention it in your enquiry so it can be added to the quotation.
Related Measuring and Optics Items
Curvature measurement links precision measuring tools with mirror and lens optics. These Physics Lab products work alongside the spherometer and can be combined on one quotation.
- Concave Mirror — 50 mm glass mirror for curvature and focal-length work.
- Micrometer — 0–25 mm screw gauge read to 0.01 mm.
- Caliper Vernier — measures the distance between the spherometer legs.
- Compact Optical Bench Kit — 1.1 m track for lens and mirror experiments.
Browse the full Physics Lab range or all physics lab equipment.
Last updated: 25 September 2026
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