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Professional Protractor
Professional Protractor (Product Code: SLE/ME/33) is a clear plastic angle-measuring instrument used to measure and draw angles in geometry, technical drawing and physics lessons such as optics ray diagrams. It has an open centre for marking the vertex, a 6 in ruler along its straight edge and permanently bonded calibrations, a practical piece of mathematics lab equipment. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.
Key Details
| Parameter | Detail |
|---|---|
| Material | Clear plastic |
| Centre | Open centre |
| Straight edge | 6 in ruler |
| Calibrations | Permanently bonded |
| Product code | SLE/ME/33 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is a Professional Protractor Used For?
Geometry classes use it to measure the angles of triangles and polygons and to construct given angles. In physics it measures angles of incidence, reflection and refraction when tracing rays through mirrors and glass blocks, the slope of an inclined plane, and the directions of forces in vector diagrams. Technical-drawing students use it for angled lines and layouts.
The clear body lets students see the lines underneath, and the open centre allows a pencil point to mark the vertex exactly. With a 6 in ruler on the straight edge, the arms of an angle can be drawn and measured without switching instruments. Place the centre point exactly on the vertex and the baseline along one arm before reading, and keep the protractor away from solvents and hot surfaces.
OEM Manufacturer
Jain Scientific Equipments Private Limited, which trades as ScienceLab, is the OEM for the Professional Protractor and produces it at the company's own licensed factory at Saha, Ambala, Haryana, India. Maths departments, stationery and lab dealers, and importers placing class-set orders buy directly from the manufacturer, and repeat orders for new groups of students are handled the same way. See the ScienceLab profile for company background.
Related Measuring Equipment
Drawing and measuring instruments used in the same geometry and optics work:
- Safe-T Compass — draws circles and arcs for constructions.
- Geometry Set — a set of drawing instruments for students.
- Protractor, Plastic, for Blackboard, 44cm — a large version for teacher demonstrations.
- Ruler, White Vinyl — a short ruler for measuring the sides of figures.
- T-Square — guides horizontal lines in technical drawing.
More instruments are listed in the Measuring category.
Frequently Asked Questions
What are the main features of the Professional Protractor?
The Professional Protractor (SLE/ME/33) is made of clear plastic with an open centre, a 6 in ruler on the straight edge and permanently bonded calibrations. The combination lets students measure an angle and draw its arms with one instrument.
Why does the Professional Protractor have an open centre?
The open centre of the Professional Protractor lets students see and mark the exact vertex on their paper instead of guessing through solid plastic. It also makes it easier to line the protractor up over existing lines on ray diagrams and constructions.
Will the calibrations on the Professional Protractor rub off?
The calibrations on the Professional Protractor are permanently bonded, so they are intended to stay legible through repeated handling in classrooms and exam practice. Clean it with a soft cloth and keep it away from solvents that can mark clear plastic.
Is the Professional Protractor suitable for physics practicals?
Yes. The Professional Protractor suits measuring angles of incidence, reflection and refraction in optics practicals, angles on inclined planes and force diagrams, as well as school geometry. Its clear body keeps the traced ray or line visible underneath.
Who manufactures the Professional Protractor?
The Professional Protractor is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab) as the OEM at its own factory in Saha, Ambala, Haryana, India, and is supplied direct to schools, colleges, dealers and importers in India and international markets.
What does a Professional Protractor quotation need?
A quotation for the Professional Protractor needs the quantity, for example a class set, the delivery address and any other geometry items such as compasses, rulers or set squares. Quotations are prepared directly by the manufacturer.
Request a Quote
Ask the manufacturer for a Professional Protractor quote through the contact page, or add it to the enquiry cart together with other geometry instruments.
Last updated: 24 September 2026
