First, it adopts mature electrode technology, which consists of stainless steel or carbon connecting buckle, backing, ag/agcl induction buckle and conductive adhesive; However, the size of the connecting buckle and the ag/agcl induction buckle is large, and the overall size of the product after the main machine is connected with the accessories is large, which makes the user have obvious foreign body feeling. The common electrode sheet does not pretreat the skin, which leads to high skin surface impedance and poor measurement signal quality.
Secondly, it consists of a substrate layer, a conductive sheet coated on the substrate layer, an ag/agcl layer covered on the conductive sheet and a conductive adhesive, which is similar to the label electrode technology. However, because the conductive sheet and the conductive adhesive layer are on the same surface, the conductive sheet is easily corroded by the conductive adhesive, which leads to the decline of the sensor performance and shortens the sensor life.