Buoyancy Balance

Product Code : EL-CTLE-10307

Buoyancy Balance (code EL-CTLE-10307) is a weighing system for finding the density of concrete specimens such as cubes and cylinders by the weight in air and weight in water method. A rigid support frame carries a water tank on a platform, which a mechanical lifting device raises to immerse the specimen hanging below the balance on its cradle, and the balance can also serve as a standard laboratory weighing device.

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Specifications

What Is the Buoyancy Balance Used For?

Density is closely linked to the strength, durability and permeability of concrete, and for hardened specimens it is found either by measuring and weighing them or, more directly, by weighing them in air and then in water. The specimen is first weighed in air on the balance, then hung in the cradle beneath it, and the lifting device raises the tank until the specimen is fully under water for a second weighing. The loss in weight equals the weight of water displaced, which gives the specimen's volume, and its mass divided by that volume gives the density. The same balance handles routine weighing as well. The standards listed are EN 12390-7 and BS 1881:114.

What to Specify When Ordering

• Quantity — the number of buoyancy balance systems required.

Frequently Asked Questions

What is the buoyancy balance used for?
It is used to determine the density of concrete specimens such as cubes and cylinders, by weighing each one in air and again while it is immersed in water.

How is the specimen lowered into the water?
The specimen hangs below the balance on a cradle, and a mechanical lifting device raises the water tank through the height of the frame until the specimen is under water.

Why does the density of concrete matter?
The density of concrete is of interest to engineers because of its effect on durability, strength and resistance to permeability.

Can the balance be used for other weighing jobs?
Yes, the balance supplied with the system may also be used as a standard weighing device, so it covers other weighing work in the laboratory too.

Is there another way to find hardened concrete density?
Density of hardened concrete is found either by measuring the specimen's dimensions, weighing it and calculating, or by weighing it in air and in water as this balance does.

Which standards are listed for the buoyancy balance?
The standards listed are EN 12390-7 and BS 1881:114, and the system is built around a rigid frame with a lifting water tank.

OEM Manufacturer

Buyers of the Buoyancy Balance deal directly with its maker, Engineering Lab Equipment (Engineering Labs Equipment Pvt Ltd), whose works are at Plot No. 43, Industrial Park, Sector 2, Growth Center, Saha, District Ambala, Haryana, India. The company designs, makes and tests concrete testing equipment, from workability apparatus and specimen moulds to compression and flexure machines, supplies engineering colleges, polytechnics, technical training institutes and research laboratories in India and overseas, and builds to institution-specific requirements on request. Tender details are on the Tenders/OEM page.

Related Concrete Testing Equipment

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• Beam Mould — 100 × 100 × 500 mm concrete beam mould of 4 plates with base plate.
• Fill Box Apparatus-Kajima Test — transparent 500 × 300 × 900 mm fill box for SCC with 20 mm maximum aggregate.

See the full Concrete Testing Lab Equipment range or all Civil Engineering Lab Equipment.

Request a Quote

For this and other concrete testing lab equipment, schools and colleges can contact Engineering Lab Equipment, a manufacturer, supplier and exporter based in Ambala, India. Quotations are given on request: send the number of buoyancy balance systems required and your delivery location through the contact page, or add the Buoyancy Balance to the enquiry cart from this page.

Last updated: October 2026