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Shape Index Caliper
Shape Index Caliper (Product Code: SLE/AG/08) is a measuring caliper used for the determination of the shape factor of aggregate particles in road construction and concrete laboratories. Engineering students and mix designers use it to identify non-cubical particles; it reads over a 200 mm range in 0.05 mm increments and weighs about 0.4 kg. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM laboratory instrument manufacturer in India, at its own factory in Ambala.
Specifications
| Parameter | Detail |
|---|---|
| Purpose | Determination of the shape factor of aggregates |
| Measurement range | 200 mm |
| Graduation | 0.05 mm increments |
| Dimensions | 450 x 150 x 50 mm |
| Weight (approx.) | 0.4 kg |
| Product code | SLE/AG/08 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Shape Index Caliper Used For?
A representative test portion is taken and each particle is measured in turn: first its longest dimension, then its thickness. The ratio of the two is compared with the limit given in the method your laboratory follows, and every particle beyond that limit is set aside as non-cubical. The mass of the non-cubical particles as a percentage of the whole portion is reported as the shape index. The fine 0.05 mm graduation over a 200 mm range covers everything from small chippings to large coarse aggregate.
At about 0.4 kg the caliper is light enough for students to use through a long practical, which makes it a sensible addition to lab equipments for technical institutes running highway materials courses. Hold each particle in its natural resting position, close the jaws gently without forcing, and wipe dust from the scale so readings stay clear.
OEM Manufacturer
ScienceLab is the trading name of Jain Scientific Equipments Private Limited, the OEM (original equipment manufacturer) of this Shape Index Caliper, which is produced at the company's own licensed factory at Saha, Ambala, Haryana, India. The company is a registered MSME manufacturer (Udyam UDYAM-HR-01-0003714) and ships export orders under Importer-Exporter Code AAECJ8618A issued by DGFT. Calipers go factory-direct to colleges, road laboratories, dealers and importers, and repeat orders are handled by the maker itself. More details are on the company profile.
Related Civil Engineering Lab Equipment
For a complete aggregate shape study, pair the caliper with:
- Grid Sieves — a slotted set of 14 for the flakiness index and elongation, the sieve-based shape tests.
- Thickness gauge — a slotted gauge for quickly deciding whether particles count as flaky.
- Average Least Dimension — ALD box with spacer sets, used where chip shape is expressed as a least dimension.
- Sample Splitter — reduces the stockpile sample to a manageable number of particles to measure.
- Precision Balance — weighs the non-cubical particles and the full test portion.
Further testing equipment is listed in the Civil Engineering Lab Equipment category.
Frequently Asked Questions
What range and graduation does the Shape Index Caliper have?
The Shape Index Caliper measures up to 200 mm and is graduated in 0.05 mm increments, which covers small chippings as well as large coarse aggregate particles with a reading fine enough for shape-factor work.
How large and heavy is the Shape Index Caliper?
The Shape Index Caliper measures 450 x 150 x 50 mm and weighs approximately 0.4 kg, so it can be used for long sessions on any lab bench or carried to a site laboratory.
How does the Shape Index Caliper differ from grid sieves?
Grid sieves sort particles by passing them through slots, while the Shape Index Caliper measures each particle directly to find its shape factor. Specifications may call for one test or both, so check your method before ordering.
How should the Shape Index Caliper be cared for?
Keep the scale and jaws of the Shape Index Caliper clean and dry, avoid dropping it, and store it flat when not in use so the jaws stay aligned and the graduations remain easy to read.
Who manufactures the Shape Index Caliper?
The Shape Index Caliper is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), the OEM, at its own licensed factory at Saha, Ambala, Haryana, India. Quotations and repeat orders are handled directly by the manufacturer.
Is a calibration certificate available for the Shape Index Caliper?
Please ask about calibration documents for the Shape Index Caliper when you enquire through our contact page; we will confirm what can be arranged for your order before you place it.
What should a tender enquiry for the Shape Index Caliper include?
Include the product code SLE/AG/08, the quantity of Shape Index Calipers, the delivery address in India or abroad and any vendor registration details your institution needs from the manufacturer.
Request a Quote
Request a price for the Shape Index Caliper through the contact page, or add it to the enquiry cart along with sieves and balances for your aggregate lab. You receive the quotation directly from the manufacturer.
Last updated: 24 September 2026
