| A non-enzymatic sensor element with selectivity is used to sense a concentration of a target analyte and includes a substrate and an electrode assembly.  The electrode assembly is connected to the substrate and includes a working electrode, a reference electrode and an auxiliary electrode.  The working electrode includes a conductive layer, a catalyst layer and a selective layer.  The conductive layer is connected to the substrate.  The catalyst layer is connected to the conductive layer and includes a catalyst for oxidizing the target analyte.  The selective layer is connected to the catalyst layer and includes an ionic liquid having a high affinity with the target analyte.  The target analyte passes through the selective layer and contacts with the catalyst layer, and the target analyte is oxidized by the catalyst. |