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<p>In the traditional online detection system for dissolved gases in oil, the separation of the degassing module and the detection module leads to problems such as large gas chamber volume, long transmission path, high risk of gas leakage, and low detection accuracy. In response to the above problems, this paper studies the packaging structure of an immersed electrochemical sensor based on membrane separation and degassing. This gas sensing method that integrates degassing and detection can greatly optimize the gas transmission path and improve oil and gas separation. Efficiency and sensor reliability. A parametric film-making process based on spin coating was proposed, and an AF2400 (Amorphous Fluoropolymer 2400) separation layer with a thickness of 2&#xa0;μm was successfully prepared on 100/500&#xa0;nm composite ceramics. The immersed electrochemical acetylene sensor was calibrated and tested in a gas environment. The results showed that the response time of the sensor in gas was 135&#xa0;s, the nonlinear error was 2.4%FS, the sensitivity was 22.3&#xa0;mV/ppm, and the resolution was 1&#xa0;ppm; the response time of the sensor for detecting dissolved acetylene in oil is 57&#xa0;min, which can meet the detection needs of the online DGA (Dissolved Gas Analysis) system. The integrated gas sensor packaging design based on membrane separation proposed in this article is a universal solution that can provide new ideas for the packaging design of gas sensors working in harsh environments.</p>

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Packaging Technology of Immersed Electrochemical Sensors for Oil-Soluble Gas Detection

  • 期刊论文

  • 发表日期：

    2025年5月17日

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  • Lirong Liu,
  • Yuanjia Li,
  • Chengzhou Zhang,
  • Liaozhao Yi,
  • Junjian Peng,
  • Junda He

摘要

In the traditional online detection system for dissolved gases in oil, the separation of the degassing module and the detection module leads to problems such as large gas chamber volume, long transmission path, high risk of gas leakage, and low detection accuracy. In response to the above problems, this paper studies the packaging structure of an immersed electrochemical sensor based on membrane separation and degassing. This gas sensing method that integrates degassing and detection can greatly optimize the gas transmission path and improve oil and gas separation. Efficiency and sensor reliability. A parametric film-making process based on spin coating was proposed, and an AF2400 (Amorphous Fluoropolymer 2400) separation layer with a thickness of 2 μm was successfully prepared on 100/500 nm composite ceramics. The immersed electrochemical acetylene sensor was calibrated and tested in a gas environment. The results showed that the response time of the sensor in gas was 135 s, the nonlinear error was 2.4%FS, the sensitivity was 22.3 mV/ppm, and the resolution was 1 ppm; the response time of the sensor for detecting dissolved acetylene in oil is 57 min, which can meet the detection needs of the online DGA (Dissolved Gas Analysis) system. The integrated gas sensor packaging design based on membrane separation proposed in this article is a universal solution that can provide new ideas for the packaging design of gas sensors working in harsh environments.