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NIST Metallurgy Division-Rockwell Hardness

Sam Low (NIST Metallurgy) 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.

News & Announcements

Revision of Handbook 150 released

NVLAP has released the 2016 edition of NIST Handbook 150, NVLAP Procedures and General Requirements.  This addition supersedes and replaces the 2006 edition of the handbook.  Please click here for information regarding the changes in this new publication

Recent Lab Bulletin Releases

Lab Bulletin LB-93-2016, Use of Computerized Systems for the Recording of Bulk Asbestos Analysis Data, issued on March 4, 2016


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:
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301-926-2884 Facsimile

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E-mail: nvlap@nist.gov

Web URL: www.nist.gov/nvlap/