BILATERAL KEY COMPARISON SIM.T-K6.1 ON HUMIDITY STANDARDS IN THE DEW/FROST-POINT TEMPERATURE RANGE FROM -25 °C TO +20...

Area of Science:

• Metrology and Measurement Science
• Atmospheric Science and Climatology
• Environmental Monitoring

Background:

• Regional Metrology Organizations (RMOs) facilitate international scientific collaboration and ensure measurement traceability.
• Accurate measurement of dew/frost point temperatures is critical for climate monitoring, weather forecasting, and industrial processes.

Purpose of the Study:

• To conduct a key comparison of dew/frost point temperature measurement standards between NIST (USA) and NRC (Canada).
• To determine the degree of equivalence between the humidity laboratory standards of the participating National Metrology Institutes (NMIs).

Main Methods:

• A key comparison protocol was established for the inter-laboratory calibration.
• Humidity laboratory standards and their associated uncertainty budgets at NIST and NRC were documented.
• Dew/frost point temperature data were acquired and analyzed according to the established protocol.

Main Results:

• The comparison determined the degree of equivalence between the dew/frost-point standards of NIST and NRC.
• Detailed descriptions of the humidity laboratory standards and uncertainty budgets for both NIST and NRC were provided.
• The acquired data and analysis confirmed the reliability of the measurement standards used by both institutions.

Conclusions:

• The key comparison successfully established the equivalence of dew/frost point temperature measurements between NIST and NRC.
• The findings contribute to the global network of metrology services, enhancing confidence in international humidity measurements.
• This study underscores the importance of RMOs in maintaining high standards in scientific measurement and data integrity.