| Abstract |
| Gas sensors are crucial devices in various fields such as industrial safety, environmental monitoring, gas infrastructure including hydrogen use, and medical diagnostics. These sensors precisely measure the presence of gases on-site in different environments to ensure operational safety and efficiency. Designed for high sensitivity, stability, and reliability, gas sensors are often required to be cost effective and compact while providing a rapid response. To address these diverse needs, we have developed two types of gas sensors based on volumetric and manometric methods. These two sensors are operated by measuring the gas volume and the pressure changes, respectively, by emitted gas. They are capable of determining the values of gas transport parameters, such as gas uptake, solubility, and diffusivity, for polymers exposed to gas under a high pressure environment. The sensors provide rapid responses within one second and can measure gas uptake in a range from 0.01 wt·ppm to 1500 wt·ppm with adjustable sensitivity and measurement ranges. Performance evaluations demonstrate the sensors' reliability, adaptability to varying measurement ranges, and stability under temperature/pressure fluctuations. The results demonstrate that this sensor system provides real-time detection and analysis of gas transport properties in gases, including H2, He, N2, O2, and Ar, and that it is suitable for pure gas sensing.
(Received 6 February, 2025; Accepted 10 May, 2025) |
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| Key Words |
| Gas sensors, Volumetric measurement, Manometric measurement, Gas emission, Diffusivity, Polymer |
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