Research Article

Comparison of humidity measurements between three research institutions considering reference value selection

¹ South China Sea Sea Area and Island Center, Ministry of Natural Resources, South China Sea Standard Metrology and Information Center, Ministry of Natural Resources, Guangzhou, Guangdong 510000, China
² East China Sea Standard and Metrology Center of Ministry of Natural Resources, Shanghai 200000, China
³ North China Sea Standard and Metrology Center, Qingdao, Shandong 266000, China

^* Corresponding author: gchao3110@163.com

Received: 8 August 2024
Accepted: 19 April 2025

Abstract

This paper aims to verify the issue of accuracy and consistency in measuring marine humidity by introducing a comparison of humidity measurement carried out by three research institutions. The focus is on aspects such as measurement value traceability, humidity sensor calibration method, comparison method, and analysis of the comparison results. Based on uncertainty analysis, the study further examines the impact of distinct calculation models for reference values. Moreover, the results of the humidity comparison demonstrate a high level of consistency among the three marine metrology laboratories, providing support for the accuracy as well as reliability of the national marine humidity measurement data. Additionally, this humidity comparison work provides valuable insights for research on reference value.