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Determination of the volume or mass density of a solid or liquid

This calibration process provides you with a certificate demonstrating the traceability of your standards with respect to the international system of units. The LNE National Metrology Laboratory safeguards the preservation, development and improvement of France's mass unit as well as its transfer to industry.

Proposed calibration services

  • Determination of the volume or mass density of a solid at 20°C, relative uncertainty (k=2), 2 to 5 x 10-5
  • Determination of the mass density of a liquid by means of the pycnometric method at a temperature ranging from 5° to 60°C, relative uncertainty (k=2), 5 x 10-4
  • Determination of the mass density of a liquid by means of the pycnometric method at a temperature ranging from 5° to 60°C, relative uncertainty (k=2), 5 x 10-5
  • Determination of the mass density of lattice structures built using additive manufacturing principles.

Accreditation details

These services are performed under COFRAC Accreditation No. 2-36

List of sites and scopes available on www.cofrac.fr

Additional services

Mass density of a solid

The volume and mass density of a solid are determined by application of the hydrostatic weighing method, which consists of weighing the body in air and then in pure water.
To determine the mass density of a metal alloy, a cylinder weighing approx. 200 g is sufficient and yields a relative uncertainty on the order of 5 x 10-5.
The body must be made of an impermeable single block with a polished surface in order to avoid sticking to air bubbles during the weighing step in water.
This calibration operation is normally performed at 20°C. Calibration may be undertaken at temperatures lying between 5° and 60°C for volumes smaller than or equal to 0.65 dm3.

Mass density of a liquid

The mass density of a liquid is determined by the hydrostatic weighing of a standard volume or by means of the pycnometric method.
The hydrostatic method is reserved for high-level standards as a customized service performed under a separate quote.
The pycnometric method is practiced using one or two, 100-cm3 or 50-cm3 working pycnometers deployed in a heat-controlled bath.
The sample volume required to conduct these measurements is approx. 250 cm3.
The calibration temperature can lie within an interval extending from 5° to +60°C.