The Complete Guide to NABL Accreditation for Testing Labs

NABL accreditation assesses a laboratory against ISO/IEC 17025:2017 — covering technical competence, measurement traceability, uncertainty estimation, staff qualification and quality management.

Accreditation is scope-specific. A lab is accredited for defined measurement parameters and ranges, so always check that your instrument type and capacity fall inside the stated scope.

Traceability is the backbone: reference standards are calibrated against higher standards, ultimately linked to national standards at NPL, with documented uncertainty at each step.

For a buyer, accreditation is assurance that results are defensible — in an inspection, in a customer dispute, and in an audit.