Preparation and Characterization of a High-Stability,Low-Noise Ag/AgCl Sensor for Marine Electric Field Measurements  

作　　者：WANG Chenjuan LI Yuguo LU Jie DAI Tianyi ZHONG Zhihao LIU Lanjun CHEN Jialin 

机构地区：[1]College of Marine Geosciences,Ocean University of China,Qingdao 266100,China [2]Key Laboratory of Submarine Geosciences and Prospecting Techniques of Ministry of Education,Ocean University of China,Qingdao 266100,China [3]College of Geophysics and Petroleum Resources,Yangtze University,Wuhan 430100,China [4]College of Engineering,Ocean University of China,Qingdao 266100,China

出　　处：《Journal of Ocean University of China》2025年第2期332-342,共11页中国海洋大学学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.U23B20158,91958210,42004055)。

摘　　要：A new Ag/AgCl sensor for measuring marine electric fields was prepared and characterized through electrochemical methods and scanning electron microscopy.Its performance was evaluated in both laboratory and deep-water settings.The study indicates that the double-pulse electrodeposition method is advantageous for producing Ag/AgCl sensors that maintain excellent stability over time.During a 20-day continuous stability test,the potential difference of the sensor consistently remained between -24.76μV and 62.07μV,with a minimum potential difference drift of 2.77μV per 24 h.All sensors accurately detected artificial signals in both the time and frequency domains,and their responses were consistent with one another.The minimum noise level of the sensor was 0.59 nV(√Hz)^(-1)@1 Hz.The sensor performed well in high-precision electric field measurements at a depth of approximately 2800 m in the South China Sea.The high stability and low noise level of the sensor make it an effective tool for detecting electrical conductivity structures beneath the seafloor.

关 键 词：Ag/AgCl marine electric field sensor double-pulse electrodeposition method high stability low noise level 

分 类 号：P715.5[天文地球—海洋科学]