Figure 12. Amperometric biosensors showing a 3-electrode screen. The sensor body is made from ceramics. A gold working electrode (a) is surrounded by an Ag/AgCl reference electrode (b) and gold auxiliary electrode (c) and (d) means silver output contacts. The ruler in the bottom is in millimeter scale [10]

From

Biosensors: A Modern Day Achievement

Shruthi GS, Amitha CV, Blessy Baby Mathew

Journal of Instrumentation Technology. 2014, 2(1), 26-39