Abstract: A technique for producing a biosensor includes inkjet printing a reagent onto electrodes of the biosensor. The ink has been specially formulated to allow the reagent to be printed using inkjet printing while at the same time produce commercially viable biosensor. The inkjet printing of the reagent allows for different inkjet patterns to be produced as well as facilitates quick change over between various products. For example, the technique allows the reagent and electrode to be formed on opposite sides of a substrate. In another example, the reagent can be layered such that incompatible reagents can be separated by a barrier layer. The electrodes for the biosensor can also be inkjet printed such that most of the biosensor can be produced using inkjet technology.