Systems, methods and devices relating to a physiological sensor system to be worn on a subjects skin to measure, process or store one or more physiological parameters, the system comprising: at least one pair of sensing electrodes that measure, when in contact with the subjects skin, physiological signals indicative of the one or more physiological parameters first and second reference electrodes that concurrently provide a source signal and a reference signal for said sensing electrodes in their measurement of the one or more physiological parameters and a subject-securing device for securing said sensing electrodes and said first and second reference electrodes against the subjects skin in operation.
