Directory of Accredited Calibration Laboratories

Indexed by Field of Calibration

The Calibration Laboratories Accreditation Program was established in response to a request from the National Conference of Standards Laboratories (NCSL). Under the Calibration Laboratories LAP, laboratories are accredited to perform calibrations, at specified ranges and uncertainties, in one or more of the eight fields of calibration covering in excess of eighty parameters. To become accredited, laboratories must meet the requirements set forth in NIST Handbook 150, NVLAP Procedures and General Requirements. The NIST Handbook 150-2 handbook series for calibration laboratories was developed to assist laboratories in achieving accreditation by providing guidelines for good calibration laboratory practices. Click here to view the list of NVLAP handbooks in this series.

Calibration laboratories are accredited by NVLAP for compliance with the general requirements of ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories. Laboratories wishing to do so may also be evaluated and recognized for compliance to ANSI/NCSL Z540-1, Calibration Laboratories and Measuring and Test Equipment - General Requirements, Part 1. This will require that the laboratory address those requirements of ANSI/NCSL Z540-1-1994 that are not sufficiently addressed by ISO/IEC 17025. A short checklist is provided at Supplemental Checklist for Verification of Compliance to ANSI/NCSL Z540-1-1994, Part 1.

Index to Accredited Calibration Labs by Field of Calibration

Click on the field of calibration to view a listing of laboratories accredited by NVLAP for that field.

For additional information, contact NVLAP at (301) 975-4016.

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