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I require a really sensitive electrode (has to detect changes within 1-3mV). I started out with a crapload of noise in my signal (about 40mV) and have cut that down to about 15mV by changing out the wire and reference electrode. However, 15mV of noise still renders my electrode useless. Anybody here with experience know how to trouble-shoot this thing? I have everything grounded.
Buying a new one isn't an option, I had to make this myself from scratch because it had to detect a special cation. The funny thing is that two PhDs couldn't help me but I am almost 100% sure I'll get an answer here.