LOGO2 Photo 1 whole setup Bridge & OPAMP

ENZYME ASSAYS - easily MEASURED BY            

                      CHANGES IN        




Simple, Sensitive, Low Cost (ca. £200) &  Reliable


                     EASY TO BUILD


Can be used for: Blood & Urine Clinical Tests, Industrial,

       College & School projects [see APPLICATIONS]


Uses two low cost electrochemical cells (Sample & Reference) in an ac bridge for extra differential sensitivity


The simple bridge circuit & the apparatus are shown below

Links are in BLUE & underlined



The apparatus - insulated box lid removed..

                          seen behind