1) Where does the energy come from to spray this water?
Make sure you get the physicists scopes that measure current going in the opposite direction.
But seriously, you can't got wrong with Tek scopes they are everywhere, a good interface to learn, but not cheap. As far as analyzers, really depends on your needs and once again budget...
I feel like the norm is Tek scopes, Agilent (HP) analyzers, counters, supplies...Not that it's the best, just what I've used and seen throughout the years.
Just find your local sales reps, they'll gladly loan you some.
The trouble with money is it costs too much!