How many bottles of Electrode Cap Gel do I need?
I am conducting a research using All-in-One EEG Electrode Cap Starter Kit. The number of subjects is around 40, of which each is mounted with 16 electrodes. I read the gel's description (https://shop.openbci.com/collections/frontpage/products/electrodegel?variant=28056992776264), but I could not find an information that I can imply the number of gel bottles needed for my experiments. I will be very glad if somebody could suggest me.