Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

SP 330 - Appendix 2 & 3

Appendix 2. Practical realization of the definitions of some important units

Appendix 2 is published in electronic form only, and is available on the BIPM website (www.bipm.org).

Appendix 3. Units for photochemical and photobiological quantities

Appendix 3 is published in electronic form only, and is available on the BIPM website (www.bipm.org).

Contacts

Created September 3, 2019, Updated November 15, 2019