- Physics Lab Equipment
- Chemistry Lab Equipment
- Biology Lab Equipment
- Anatomical Lab Equipment
- Learning
- Educational Lab Equipment
- Magnets
- Agriculture
- Astronomy
- Earth Science
- Geography Lab Equipment
- Safety Lab Coat
- Laboratory
- Meteorological
- Electricity & Magnetism
- Heat
- School Lab Equipment
- Lab Glassware
- Science Lab Equipment
- Tvet Lab Equipment
- Robotics Kits Supplier and Manufacturer for Schools India
- Math Lab Equipment Manufacturers and Exporters in Ambala
- STEM Kits Manufacturers and Supplier India
- Engineering Lab Equipment
- Hospital Lab Equipment
- Water, Sanitation & Hygiene Supplies
- Cold Chain, Solar & Communication Equipment
- Nutrition
Opisometer
Opisometer (Product Code: SLE/PHY/264) is a hand-held map measurer used to find the length of curved lines on maps, drawings and diagrams in geography, physics and mathematics classrooms. Students and teachers use it wherever a ruler cannot follow a bend: its knurled wheel runs on a transversely mounted threaded spindle, so the distance traced along a curve can be re-run along a straight scale. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.
Key Details
| Parameter | Detail |
|---|---|
| Instrument | Opisometer (curvimeter) for curved-line measurement |
| Mechanism | Knurled wheel running on a transversely mounted threaded spindle |
| Purpose | Measuring the length of curved lines |
| Product code | SLE/PHY/264 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is an Opisometer Used For?
To take a reading, turn the knurled wheel until it reaches the stop at one end of its spindle, then roll it along the curve — a river, road, coastline or boundary. As the wheel turns it travels along the threaded spindle. Next, roll it backwards along a ruler or the map’s scale bar until it returns to the stop: the straight distance covered equals the length of the curve, and the map scale converts it to a real-world distance.
In geography it measures river lengths and route distances; in physics and mathematics it measures curved wires drawn on paper, graph curves and arcs, which students can compare with values calculated from a radius. Keep the wheel upright, trace slowly, and repeat each measurement to take an average. It is a handy, low-maintenance piece of laboratory equipment for schools in India and elsewhere.
OEM Manufacturer
ScienceLab is the trading name of Jain Scientific Equipments Private Limited (CIN U29309HR2020PTC087597), the OEM (original equipment manufacturer) of this opisometer. It is produced at the company’s licensed factory at 449, HSIIDC Industrial Area, Saha, Ambala, Haryana (Factory Licence AMB-ONLINE-CHD-J-414), and sent factory-direct to schools, colleges, institutions, dealers and importers.
Because quotations come straight from the manufacturer, repeat orders are simple to arrange. Read the ScienceLab profile for more about the company.
Related Physics Lab Equipment
Other measuring tools that complement the opisometer:
- Metal Ruler — a straight scale to read off the distance rolled by the wheel
- Meter Stick, White — for longer straight measurements on wall maps and charts
- Trundle Wheel — measures real distances outdoors, the field counterpart to map work
- Caliper Vernier (Metal) — for precise measurement of small straight lengths
Explore the Physics Lab Equipment category for more.
Frequently Asked Questions
What is an Opisometer used for?
An Opisometer is used to measure the length of curved lines, such as rivers, roads and boundaries on maps, or curves on drawings and graphs. It follows bends that a straight ruler cannot, giving a length that can then be converted using the map scale.
How do you read a measurement from the Opisometer?
After tracing a curve with the Opisometer, roll it backwards along a ruler or map scale bar until the wheel returns to its starting stop. The straight distance rolled equals the curve’s length on paper, which the map scale converts to real distance.
How does the Opisometer work mechanically?
The Opisometer has a knurled wheel running on a transversely mounted threaded spindle. Each turn of the wheel moves it along the thread, so its position records the distance travelled; rolling it back the same distance returns it to the start.
Can the Opisometer be used on any map scale?
Yes, the Opisometer measures length on the paper itself, so it works with any map. Roll it back along that map’s own scale bar to read the real distance directly, or measure on a ruler and multiply by the scale.
Who manufactures the Opisometer?
The Opisometer is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), the OEM, at its licensed factory in Saha, Ambala, Haryana, India. Schools, dealers and importers in India and international markets receive it directly from the manufacturer.
What should a quotation request for the Opisometer include?
Include the product code SLE/PHY/264, the number of Opisometers needed (for example one per student group), any rulers or other measuring tools to quote with it, and the delivery location in your request via the contact page or enquiry cart.
Request a Quote
Order the Opisometer direct from its manufacturer: send your quantity through the contact page or place it in the enquiry cart.
Last updated: 24 September 2026
