The Subcommittee covers the following topics:

• Maintenance and dissemination of the SI unit of mass 
• Kibble (watt) balance experiment 
• X-ray crystal density (Avogadro) experiment 
• Determination of the density of air 
• Characterisation, storage and stability monitoring of mass standards 
• Development and optimisation of weighing equipment 
• Optimisation of procedures for mass determination and balance calibration