Engineers and scientists working in electro-optical diagnostic fields in the past few decades have been fighting with a problem usually not seen under "normal" environmental circumstances, in that diagnostics on high-powered pulsed-power facilities such as NIF (http://en.wikipedia.org/wiki/National_Ignition_Facility) must be totally grounded against EMP to ensure accurate measurements in their insruments. The EMP and RF noise emitted by NIF is so intense even small holes for a wire going into the shielding can play havoc with any measurments being taken, in addition to the fact that long wires tend to act as antennas. All pulsed power facilities (that I have worked in) use fiber-optic network cables to transmit data throughout the building for this very reason. Fiber optic cables are non-conductive and use light to transmit information rather than electrical current, which is advantageous in noisy RF environments. Although fiber-optics can fluoresce when bombarded with certain kinds of radiation, this tends to be less of a problem than RF/EM noise in conductors. So data transmission can be done over fiber to help maintain low signal-to-noise ratios, but power going to these diagnostics is still dependent on conductors. For this reason, much new research is going into Power Over Fiber (http://www.rp-photonics.com/power_over_fiber.html), basically transmitting small amounts of power (on the order of 1 watt) using a laser on one end and photovoltaic cells on the other. It is my contention that power-over-fiber is not the only possible alternative for transmitting power over a distance of around 150 ft. One possibility I thought of off the top of my head would be pneumatic power transmission using a small compressor on one end operating at around 150psi, plastic tubing for the pressure line, and a small turbine/generator on the other end (when I say small turbine, I'm talking around the size of a Dentist's drill). Using some basic voltage/current control circuitry you could have a small power transmission circuit without the use of conductors. So, what ideas do you people have for the transmission of small amounts of power around 150 ft wihout the use of electrical conductors? I most interested in what might already be available as off-the-shelf products, but brainstorming is good too.