Hi ardhuru,
All that stuff you mentioned in Post 1 sounds pretty expensive, and Al's SS Rods do too. So using Al's Idea a little differently, suspend 4 copper stiff wires or rods vertically at different lengths, which you can adjust easily to fit your needs. You can Solder the resistors or Potentiometers to those wires, and install a PIC circuit there, powered by a couple of solar cells easily removed from 2 cheapie Yard Lights, and yes use the nicads that come in those too, then send some form of slow serial data using relatively inexpensive wire, TV lead in, sprinkler wire, twisted doorbell wire . . . to another PIC . Compared to shielded wire and fancy Stainless steel rods this should be cheap. You could put the wire array in a piece of plastic pipe and insert it vertically into the Well, sump, or whatever it is you are checking.
If you do not believe in MAGIC, Consider how currency has value simply by printing it, and is then traded for real assets.
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Gold is the money of kings, silver is the money of gentlemen, barter is the money of peasants - but debt is the money of slaves
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There simply is no "Happy Spam" If you do it you will disappear from this forum.
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