Researchers at the Fraunhofer Institute for Physical Measurement Techniques (IPM) in Freiburg, Germany, have developed innovative sensor systems and measuring equipment to enhance the safety of hydrogen use in various applications. The sensor technologies aim to detect leaks in hydrogen lines, tanks, and connectors, essential for ensuring the safety of hydrogen infrastructure due to its flammable and explosive nature. The sensor systems developed by Fraunhofer researchers cover a wide range of scenarios in the hydrogen economy. Ultrasonic sensors utilize the photoacoustic effect to detect hydrogen leaks accurately. This technology uses light to generate resonant sound waves in the gas, enabling the detection of even minimal hydrogen presence. The ultrasonic sensor is highly precise, capable of identifying contaminants in hydrogen, ensuring its purity for sensitive applications like fuel cells. In addition to ultrasonic sensors, Fraunhofer IPM has developed a laser spectrometer for remote detection of ammonia, simplifying storage and transportation of hydrogen. Rapid leak detection is crucial when using ammonia as a carrier matrix due to its toxicity. The laser spectrometer allows specialists to check pipelines or tanks from a safe distance, enhancing safety measures in hydrogen-related facilities. Furthermore, the researchers at Fraunhofer IPM have employed Raman spectroscopy to develop a filter-based Raman sensor for selective hydrogen detection in complex media. This portable system, equipped with low-cost components, can quantify hydrogen, making it suitable for applications in the energy sector. The sensor systems developed as part of the TransHyDE project, supported by the German Federal Ministry of Education and Research, highlight Germany's commitment to advancing hydrogen technology. The Fraunhofer experts not only focus on technology development but also provide guidance to industry stakeholders on safe hydrogen project implementations. Dr. Carolin Pannek, leading the subproject on safe infrastructure, envisions a promising future for hydrogen and emphasizes the importance of expanding the hydrogen economy.