The INRiM Pressure and Vacuum Laboratory develops and maintains the pressure scale over a range spanning more than nine orders of magnitude, from medium vacuum (9 × 10-2 Pa) to high pressures (5 × 108 Pa).
The realization of the pressure scale is guaranteed through the use of ten primary standards based on different physical laws, depending on the pressure field in which they work and on the basis of nine internationally recognized CMCs and present on the BIPM KCDB.
Dissemination is achieved by calibrating standards and transducers, including:
Pressure balances: determination of the effective area of piston-cylinder assembly by comparison with primary standards;
Pressure transducers in absolute, relative, and differential mode;
Vacuum gauges.
The Laboratory also serves as a provider in the organization and periodic execution of inter-laboratory comparisons.
