An electrochemical glucose sensor comprising a base substrate, a conductive layer disposed on said base substrate, where said conductive layer comprises a reference electrode and at least two working electrodes; an insulation layer disposed on a part of said conductive layer, a reagent layer disposed on said working electrodes and on at least a part of said reference electrode, an adhesive layer disposed on a portion of said reagent layer and conductive layer wherein said adhesive layer substantially defines an area of said reference electrode which can be wetted by a liquid sample and said insulation layer substantially defines an area of said working electrodes which can be wetted by a liquid sample.