Bilateral key comparisons of dew point temperature standards of national metrological institutes

Main text A Regional Metrology Organization (RMO) Key Comparison of dew/frost point temperatures was carried out by the The Federal State Unitary Enterprise "All-Russian Scientific Research Institute of Physical, Technical and Radio Engineering Measurements" (VNIIFTRI, Russia) and the RSE "Kazakhstan Institute of Standardization and Metrology" (KazStandard, Kazakhstan) between September, 2024 and February, 2025. The results of this comparison are reported here, along with descriptions of the humidity laboratory standards for VNIIFTRI and KazStandard and the uncertainty budget for these standards. This report also describes the protocol for the comparison and presents the data acquired. The results are analyzed, determining degree of equivalence between the dew/frost-point standards of VNIIFTRI and KazStandard. To reach the main text of this paper, click on Final Report . Note that this text is that which appears in Appendix B of the BIPM key comparison database https://www.bipm.org/kcdb/ . The final report has been peer-reviewed and approved for publication by the CCT, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).