Biosensor with a bar code

Biosensor (10, 110, 210) comprising: a supporting substrate (12), an electrically conductive (13) coating disposed on the first surface (22) of the support substrate (12), constituted the coating (13) define - electrodes (14, 16) of the first surface (22) of the support substrate (12); and - a drawing discernable optically or electrically (40, 140, 240) code on the first surface (22) of the support substrate (12), wherein the electrodes are isolated from the rest of the electrically conductive coating on the substrate by a interstitium and drawing code is insulated from the electrodes and the rest of the electrically conductive coating on the substrate by gaps (42).