Hydrogen Sensing Technology for Pressure Measurement

This technology guide discusses the challenges and solutions related to hydrogen sensing in pressure measurement instruments, particularly focusing on the impact of hydrogen diffusion on measurement accuracy. The document outlines the principle of thin-film pressure measuring cells, which utilize electrical resistors on a diaphragm to detect pressure changes. It explains how hydrogen atoms can penetrate metal diaphragms, leading to signal drift, especially at high temperatures. To mitigate this issue, traditional methods like gold plating are commonly used, but they come with high costs and installation challenges. The guide introduces a cost-effective alternative: titanium nitride (TiN) coatings, which protect sensors from hydrogen-induced signal drift while being easier to integrate into existing systems. The document also emphasizes the importance of safety standards for mechanical pressure gauges in hydrogen applications and discusses future trends in sensor technology that aim to enhance operational safety and efficiency in hydrogen environments.