I'm doing an experiment where 2 electrodes are inserted into 2 openings in a cylinder holding electrolytes to measure its impedance. We want the openings to be tightly sealed because the cylinder holding the electrolyte will be pressurized. Our idea is to insert the electrodes through the holes of tube fittings. The tube fitting will screw onto the threaded cylinder and it will lock into the electrodes. Will this work, and what type and size of tube fitting should I use for this? Please give any other suggestions.
Here's a picture of what it looks like. The cylinder will be remade with only 2 holes. That's the electrode with a rod attached. We're hoping the tube fitting will dig into the rod. The diameter of the rod is about 1/4 in.