Method for sensing the concentration of glucose in biological fluids

A method for sensing the concentration of glucose in biological fluids comprising

• applying a voltage to an electrode arranged for interaction with said fluids to cause a current to flow through said electrode,
• sweeping said voltage in a first direction from a first limit to a second limit and thereafter in the reverse direction, said sweep including voltages between 0.2 and 0.6 volts,
• measuring said current at at least one isolated point, between 0.2 volts and 0.6 volts, during the anodic variation of the voltage sweep, said point being selected to be sensitive to change in levels of glucose concentration in said fluid, but relatively insensitive to levels of other constituents of said fluid, and
• determining the glucose concentration level based on the current measurement at said isolated point.