ACLASS requires scopes of accreditation to meet NIST SP 811 Guide for the Use of the International System of Units (SI), where available. This NIST 811 Guide has been prepared by the National Institute of Standards and Technology (NIST) to assist those who may have need of such assistance, in the use of the SI in their work, including the reporting of results of measurements.

NIST SP 811 can be accessed on the ACLASS web site.

This table displays our Scope of Accreditation for our laboratories.