New butterfly-inspired hydrogen sensor is powered by light

A new bioinspired prototype offers a total package of features unmatched by any hydrogen sensor currently on the market. While commercial hydrogen sensors only work at 150C or higher, the new tech is powered by light instead of heat. And the sensor can detect hydrogen at concentrations from as little as 10 ppm (for medical diagnoses) to 40,000 ppm (the level where the gas becomes potentially explosive).

source https://www.sciencedaily.com/releases/2020/12/201202114524.htm