A breakthrough in hydrogen safety technology has emerged from Manchester University, where an organic semiconductor sensor has been developed. The sensor operates using a process called 'p-doping', whereby oxygen molecules increase the positive electrical charge in the active material. When hydrogen is present, it reacts with the oxygen, causing a rapid drop in electrical current. This technology, led by Thomas Anthopoulos, offers a fast and reversible detection method for hydrogen, making it an essential component for enhancing hydrogen safety. The research, published in Nature Electronics, was conducted in collaboration with King Abdullah University of Science and Technology (KAUST) in Saudi Arabia. Anthopoulos, as the Professor of Emerging Optoelectronics at Manchester, believes this sensor could revolutionize how hydrogen is handled in various sectors, including industries, homes, and transportation networks. The sensor has been tested in real-world scenarios, showcasing its superiority over portable commercial detectors in terms of speed and reliability. It has applications in detecting leaks from pipes, monitoring hydrogen diffusion in closed spaces, and even airborne leak detection via drones. The potential for the sensor extends to its ultra-thin and flexible design, enabling integration into smart devices for continuous monitoring of hydrogen systems in real time. The research team is now focusing on advancing the sensor further and evaluating its long-term stability in various sensing environments. With the world's increasing transition towards renewable energy, hydrogen is a key player in the future energy system. This organic sensor offers a promising solution to the challenges posed by the use of hydrogen, making it more accessible and safer for widespread adoption.