The activities of the Sector aim to improve knowledge, develop instruments and methods in the field of length metrology applied to the research world, to the industrial world and to space research.

The sector is organized in the following projects

• Dimensional metrology and the Standard of the Metre
• Nano-metrology and surface metrology
• Coordinate metrology and long distances
• Combined optical and X-ray interferometry (COXI)
• Realization of the kilogram through the Planck constant
• Metrology for space missions