I have been testing with two stainless tubes(one inside the other) which have a 1mm gap between them. I have noticed that I do not need any electrolyte to get a lot of bubbles. Out of curiosity, I measured resistance between the two tubes and got very strange results. Using a cheap multimeter set to 20K/ohms, displays a climb in resistance until it reaches 20.00 and then dies? Can anyone explain this to me? Are these tubes acting as an air capacitor?
After letting the tubes completely dry over night I found that I get no readings at all. But, when I put the tubes back into water, the same results as above occur. The resistance rises to it's limit and then dies.