Only National Metrological Institutes (NMI) and their designated laboratories, which are the highest metrological authorities of a country, are permitted to use the CIPM MRA logo. The prerequisite for this is that their Calibration and Measurement Capabilities (CMC) data is listed in the BIPM Key Comparison Database (KCDB). A certificate issued by a laboratory under the CIPM MRA is accepted by assessors from Conformity Assessment Bodies with the highest level of confidence.

As designated laboratory of the BEV, E+E Elektronik is an implicit cosignatory of the MRA. The E+E calibration laboratory undergoes regular audits by international experts, participates in international measurement comparisons and established a quality management system certified according to ISO 17025.

E+E Elektronik offers calibration services for humidity, dewpoint, air velocity, gas mass flow, temperature, CO₂ and pressure. Calibrations are carried out either in the designated laboratory (NMI) or the accredited OEKD calibration laboratory. Additionally, the E+E service department performs in-house or on-site ISO calibrations according to the E+E standard.

The website www.eplusecal.com provides an overview of all E+E calibration services including online calibration request.