NSAI Standards is responsible for the development of Irish Standards, representing Irish interests in the work of the European and International standards bodies CEN and ISO, and for the publication and sale of Irish Standards.

NSAI Certification creates, maintains and promotes accredited certification of products, services and organisations for compliance with recognised standards, from business management systems to product approvals.

NSAI Legal Metrology uphold and enforce accuracy and transparency in trade measures by certifying and inspecting measuring instruments used by traders and by inspecting pre-packaged goods to ensure correct quantity.

NSAI National Metrology Laboratory maintains national measurement standards for a range of physical quantities. These standards represent the best available representations, in Ireland, of the internationally agreed units of measurement.