The world’s first non-electric touchpad takes sensor technology to extreme conditions

https://www.eurekalert.org/news-releases/1062478

"senses contact force area, location, recognizes handwritten letters on its surface, distinguishes multiple simultaneous touches... soft silicone with 32 embedded pneumatic channels, each only few hundred nm wide... not affected by magnetic fields, radiation, conditions where small spark of electricity is otherwise serious hazard... wearable devices, MRI, soft robots, rehabilitation aids"