National Standards Authority of Ireland New Standards Shop

Buy Irish Standards Online

Skip to content


NSAI National Metrology Laboratory maintains national measurement standards for a range of physical quantities. These standards represent the best available representations, in Ireland, of the internationally agreed units of measurement.NML offers a range of calibration services including, acoustics, electricity, force, humidity, length, mass, pressure, temperature, time and frequency, and torque. 

Calibration Services

Instrument calibration is a basic tool designed to ensure the traceability of a measurement. It involves determining the metrological characteristics of an instrument and is achieved by means of a direct comparison against standards.

There are three main reasons for having instruments calibrated:

  • To ensure readings from an instrument are consistent with other measurements
  • To determine the accuracy of the instrument readings
  • To establish the reliability of the instrument.

To learn more about the instruments we calibrate, click here

Approval Status

The National Metrology Laboratory (NML) has responsibility for the realisation and maintenance of the national measurement standards for Ireland and the provision of traceability to users. The National Standards maintained by NML and the calibration certificates issued are approved under the CIPM MRA. NSAI NML are also certified to ISO9001.

Calibration certificates issued under the CIPM MRA are fully recognised and accepted by Accreditation Bodies and Regulatory Authorities world-wide. Please see NML CIPM doc and ISO 9001 Certificate here. Review details on the MRA official document signed by NML and BIPM. Full details on the MRA including all approved CMCs and intercomparison results may be found at the website of the Bureau International des Poids et Measures.

Decision Rule Policy as required by ISO/IEC 17025:2017

Learn More

NSAI National Metrology Laboratory
Griffith Avenue Extension,
Glasnevin, Dublin 11,
D11 E527 Ireland

T + 353 1 808 2609
F + 353 1 808 2603