Leading the research on liquid metal technology for breeding blankets in close collaboration with EUROfusion, ENEA Brasimone Research Centre (Italy) has developed a new type of sensor able to perform direct measurements of the hydrogen partial pressure in liquid metals, not considering contribution from other dissolved gases. Initially developed for fusion research to measure hydrogen isotopes concentration in lead-lithium alloy, the sensors may be useful for process control for metallurgy or other industries that are interested to measure hydrogen content for purification purposes. The sensors have been qualified in lead alloys and are now open for further developments and adaptations to industrial standards.