I went with the pH kit, which comes with probe+ezo+bnc connector + 3 calibration solution + storage solution and cost 180$. I have not checked how much each of them individually will cost. After couple of months of testing, I 'll try to build a cheaper version (probably swap out probe and bnc connector) that will bring down the cost to below 100$.
When you're free can you take a pic of the ph setup on your perma board/breadboard? Thanks!
