Using its low energy electronics expertise, the ASH Wireless Electronics team created a light powered sensor system for fit-and-forget environments in which an explosive gas/air mixture is continuously present for long periods.
Storing just 200 micro-joules, approximately one twelve-millionth of the energy stored in a typical wrist-watch, the ASH sensor system harvested light energy pulses provided via a 30 metre long optical fibre; then, using an asymmetric protocol, the same fibre conveyed sensor readings to the host.
Variants of this system would be beneficial in taking data from any situation where explosive atmospheres are present - especially where the sensors cannot be economically retrieved. e.g. mining, oil & gas installations, grain silos.
