Square material strong gel anode wipes out the wreck of wet gels. Use for estimating sEMG/ECG/EKG. Low impedance, expendable sensors come in pieces of 5 (600 anodes for each container). Ag/AgCI(silver silver chloride) sensor. 5 cathodes for each pocket.
Strong gel holds the watery substance in a polymerized hydrogel definition and is non-disturbing, non-sharpening and non-cytotoxic to the skin.