Hydrogen, a key player in the clean energy revolution, poses safety challenges due to its highly flammable and odorless nature. To address this, scientists at the University of Manchester and King Abdullah University of Science and Technology have developed a new hydrogen sensor for efficient leak detection. The sensor utilizes the process of 'p-doping' to rapidly detect minute hydrogen concentrations and outperforms commercial alternatives in size, cost, and power consumption. Real-time leak detection was successfully demonstrated, showing its potential for widespread use in various industries and environments. The sensor's physical adaptability allows for integration into smart devices, enabling real-time monitoring of hydrogen systems. This breakthrough in hydrogen safety technology could enhance trust in emerging hydrogen technologies and contribute to a safer transition to low-carbon economies.