- 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
Ruler, Plastic, Blackboard, 100cm
Ruler, Plastic, Blackboard, 100cm (Product Code: SLE/CS/010) is a metre-long demonstration ruler that lets a teacher rule straight lines and mark measured lengths on a chalkboard at a size the whole class can follow from the back row. It carries both a centimetre scale and an inch scale, which makes it equally handy for measurement lessons, geometry constructions and drawing graph axes. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, and is a practical addition to the mathematics lab kits India's primary and secondary schools put together for board-based teaching.
Specifications
| Parameter | Detail |
|---|---|
| Length | 100cm |
| Graduations | 100 x 1cm and 39 x 1inch |
| Material | Strong plastic |
| Width | 55mm |
| Thickness | 5mm |
| Supplied as | 2 x 50cm halves, assembled and held firmly together by a detachable handle |
| Intended use | Classroom teaching aid for the chalkboard |
| Estimated weight | 0.307kg |
| Estimated volume | 0.766cdm |
Typical Use
Teachers use this ruler to draw number lines, x and y axes, tables and bar-chart frameworks on the board, and to show pupils how to read a scale by lining up zero and counting whole centimetres. Having both metric and inch markings on one ruler makes it easy to compare the two systems during a units lesson. When ruling lines, hold the ruler by its handle and press it flat against the board so the chalk runs cleanly along the edge without smudging the markings.
Because it arrives as two 50cm halves, the ruler stores in a cupboard or storage box and moves between classrooms without difficulty; join the halves with the handle before the lesson and check the joint is firm so the edge stays straight. Schools planning a school lab equipment bulk supply for several classrooms often order it together with the matching blackboard protractor, compass and set squares so every room has the same set of board instruments.
Manufacturer
This ruler is produced by Jain Scientific Equipments Private Limited, the Ambala, Haryana company that trades under the ScienceLab name and makes classroom and laboratory teaching aids for schools in India and international markets. Background on the company is available on our company profile page.
Related Classroom Student Products
These blackboard instruments and board supplies are commonly used alongside the 100cm ruler in the same geometry and measurement lessons:
- Protractor, Plastic, for Blackboard, 44cm — for measuring and drawing the angles between lines ruled on the board.
- Compass, Plastic, for Blackboard, 45cm — completes the construction set for circles and arcs.
- Set Square, Blackboard, 45-45-90 degrees — for right angles and parallel lines together with the ruler.
- Set Square, Blackboard, 30-60-90 degrees — adds the 30 and 60 degree angles used in construction exercises.
- Blackboard, Double-sided, 1160 x 760 mm — a portable board surface to use the ruler on.
See the full range in our Classroom Student category.
Frequently Asked Questions
Is the 100cm ruler supplied in one piece?
No. It comes as two 50cm halves that are assembled and held firmly together by a detachable handle, which keeps it compact for storage and transport.
Which scales are marked on it?
It is graduated 100 x 1cm and 39 x 1inch, so both metric and imperial lengths can be demonstrated with one instrument.
How rigid is it on the board?
The ruler is made of strong plastic, 55mm wide and 5mm thick, giving a firm straight edge to draw against with chalk.
How should it be cleaned?
Wipe off chalk dust with a dry or slightly damp cloth and let it dry before storing; avoid solvents that could dull the printed scale.
Can a calibration certificate be provided?
This is a teaching ruler for board demonstrations. If your order needs any measurement documentation, please discuss it with us through the contact page before ordering.
What should an institutional quotation request include?
Send the product code SLE/CS/010, the number of rulers, the delivery address and any tender specification you must match, and we will reply with a formal quotation.
Do you supply larger quantities for schools and export?
Yes. We supply schools and distributors in India and international markets; the estimated weight of 0.307kg and volume of 0.766cdm per ruler help with planning freight for larger orders.
Request a Quote
To order the 100cm blackboard ruler, add it to your enquiry cart or send your quantities and delivery details through our contact page.
Last updated: 24 September 2026
