Patent ID: 8478375

Claim:
A sensor for sensing analyte concentration, comprising at least two different variants of an appropriate competitive binding assay, the sensor being capable of sensing accurately a required range of analyte concentrations by means of the variants of the assay each being capable of sensing accurately a part only of the required range of analyte concentrations and the variants of the assay being chosen to sense overlapping or adjoining ranges of concentration covering the whole of the required range, wherein the competitive binding assays each comprise: an analyte binding agent; and an analyte analogue comprising at least one analyte analogue moiety; wherein the analyte binding agent binds the at least one analyte analogue moiety of the analyte analogue to form a complex from which the analyte analogue is displaceable by said analyte; and wherein the different assays are distinguished by the number or nature of the analyte analogue moieties comprised by the analyte analogue.