where 𝜎 = 𝑉 𝛿/(𝐾 𝐷) and 𝑖 = 𝑛𝐹𝐴 𝑉 , 𝑉 being the maximum rate of the sensor (note that for a canonical MM mechanism, 𝑉 = 𝑉 as follows from Eq.( )). Note that the dimensionless parameter 𝜎 = 𝑉 𝛿/(𝐾 𝐷) which compares reaction and diffusion rates for the system at hand to some extent related to the square root of the Thiele modulus . Eq.( ) then provides the correct relationship between the current and bulk concentration of the substrate. Only this correct relationship is able to provide the kinetic data characterizing sensor under the scrutiny that ought to be considered whenever a calibrated enzymatic electrochemical sensor is aimed to be used under non-steady state conditions that do not closely correspond to those used for its calibration. values where a linearity is apparently restored (Fig. ). Yet, as noted through comparing Fig. to Fig. (compare the dashed lines in Fig. to the dotted lines in Fig. ) the theoretical limits predicted when 𝑖 → 𝑖 given in Eq.( ) require extremely large 𝐾 /[𝑆] values: