NIST logo
NIST Metallurgy Division-Rockwell Hardness

Sam Low (NIST Metallugy) at the primary Rockwell hardness reference machine for the U.S.

Cameron Miller with integrating sphere

Cameron Miller (NIST Optical Technology) at NIST 2.5 m integrating sphere for LED measurements.

Gina Kline - Process Measurements Division

Gina Kline (NIST Process Measurements) recording data over PVTt primary gas flow standard.


The National Voluntary Laboratory Accreditation Program (NVLAP) provides third-party accreditation to testing and calibration laboratories in response to legislative actions or requests from government agencies or private-sector organizations.

NVLAP-accredited laboratories are assessed against the management and technical requirements published in the International Standard, ISO/IEC 17025:2005.


General inquiries:
301-975-4016 Telephone
301-926-2884 Facsimile

100 Bureau Drive, M/S 2140
Gaithersburg, MD 20899-2140


Web URL: