The present disclosure pertains to an electrode configured to provide electrical contact with skin of a subject. The electrode is a convertible electrode configured to function as a dry electrode and/or as a wet electrode according to the desired configuration. In a dry electrode configuration, the electrode includes a conductive portion, a receiving portion, and an electrical coupling. In a wet electrode configuration, the electrode includes conductive portion, receiving portion, a hydrogel material, and electrical coupling. The conductive portion is configured to receive and/or transmit electrical signals from and/or to the skin of the subject. The receiving portionis configured to receive the detachable hydrogel material. Without the hydrogel material, the electrode functions as a dry electrode. Responsive to the receiving portion receiving the detachable hydrogel material,the electrode functions as a wet electrode.