Official websites use .gov
A .gov website belongs to an official government organization in the United States.
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.
Quality Management System
NIST measurement services, including reference materials, quality assurance programs and calibrations, operate under the auspices of the NIST quality manual QM-I as described by the NIST quality website at: https://www.nist.gov/nist-quality-system. The NIST Quality System for Measurement Services is based on the ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories) and includes the requirements of ISO 17034 (General requirements for the competence of reference material producers), ISO/IEC 17043 (General requirements for proficiency testing) and ISO/TS 8000 (Data quality) as they apply to the various measurement services that NIST deliver.