A pseudo-orthogonally redundant glucose sensor device may include one or more electrochemical peroxide-based glucose sensor(s) and one or more electrochemical oxygen-based sensor(s). The electrochemical peroxide-based glucose sensor(s) may operate as traditional peroxide-based sensor(s), which may include a chemistry stack with glucose oxidase as a catalytic agent. The electrochemical oxygen-based sensor(s) may be used to measure oxygen, as well as to measure glucose by computing differences in oxygen between two working electrodes. In embodiments of the invention, one of the oxygen-based sensors may be used directly as a diagnostic to determine whether each peroxide-based glucose sensor is functioning properly, as well as to determine which modality of sensing to use. Because of the internal oxygen-based reference, the glucose sensor device provides oxygen-resistant glucose sensing, as well as near-orthogonal redundancy.
