Search facility:  
BIPM Home | Site map | Metrologia | KCDB | JCTLM-DB | Contact us  
   
Mettler HK1000MC balance, housed in an air-tight enclosure, used for calibrations
Summary
The international prototype
The international prototype of the kilogram and its six official copies
Stainless-steel one-kilogram standard in its travelling case for a key comparison
Steam cleaning of a 1 kg prototype before a mass comparison
Mettler HK1000MC balance, housed in an air-tight enclosure, used for calibrations
Finding the centre of gravity of a mass standard
Magnetic properties
Heterodyne refractometer used to monitor air density variations
Phase-modulated ellipsometer used to study surface effects on mass standards
Gas storage network
Vacuum network
Direct access