SEARCH Articles Figures Tables Active optodes Bulk optodes Extrinsic optodes Fiber optodes Fluorescent sensors optode Intrinsic optodes Ion optode Optical sensors/optodes Optode Optode Optode (optical fiber chemical sensor Optode photodiode Optode technique Optodes Fibre Sensors with a Chemical Receptor Optodes biosensors Optodes core-based Optodes dioxide Optodes semi-active Optodes with Simple Receptor Layers Oxygen optode Oxygen optodes Passive optodes Surface optodes