Have a look at this post:
http://ecorenovator.org/forum/conser...faucets-2.html
It might not be exactly what you need. But so far, having installed two sensor faucets (main bathroom and kitchen) and two foot pedal "faucets" in the same house, I am all for the foot pedal. It beats not only conventional faucets, but even the sensor ones, on most counts.
It is simple, requires no batteries or mains, and unless you are a unable to use your foot to operate the water, it is pure joy.
For bathrooms to cater for disabled people, there might have to be some other faucet solution - in case they cannot use a foot pedal.