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Standard Reference Data, NIST:
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International Trade

The International Comparisons Database provides access to results of comparisons of measurements and standards organized by the consultative committees of the Comite International des Poids et Mesures (CIPM) and the Regional Metrology Organizations. The official source of the data is the BIPM key comparison database.

These measurements promote innovation, increase competitiveness, and facilitate trade.

The codes in the list below have the following meanings:

PC PC product, most available for purchase, some are free
Online Free online system
DG Inclusion in the NIST Data Gateway - a portal providing access to many NIST scientific and technical databases. It is searchable by keyword, property, or substance name.
* Product contains data that have undergone rigorous critical evaluation by experienced researchers who recommend best values.
Online Subscription Product is a yearly subscription web product.

SRD 136 International Comparisons Database, Online, DG