  The ability to rapidly detect hydrogen gas upon occurrence of a leak is
critical for the safe large-scale implementation of hydrogen (energy)
technologies. However, to date, no technically viable sensor solution exists
that meets the corresponding response time targets set by stakeholders at
technically relevant conditions. Here, we demonstrate how a tailored Long
Short-term Transformer Ensemble Model for Accelerated Sensing (LEMAS)
accelerates the response of a state-of-the-art optical plasmonic hydrogen
sensor by up to a factor of 40 in an oxygen-free inert gas environment, by
accurately predicting its response value to a hydrogen concentration change
before it is physically reached by the sensor hardware. Furthermore, it
eliminates the pressure dependence of the response intrinsic to metal
hydride-based sensors, while leveraging their ability to operate in
oxygen-starved environments that are proposed to be used for inert gas
encapsulation systems of hydrogen installations. Moreover LEMAS provides a
measure for the uncertainty of the predictions that is pivotal for
safety-critical sensor applications. Our results thus advertise the use of deep
learning for the acceleration of sensor response, also beyond the realm of
plasmonic hydrogen detection.
