AMPEROMETRIC SENSOR COMPRISING COUNTER ELECTRODE ISOLATED FROM LIQUID ELECTROLYTE

摘要

An amperometric sensor (100) includes a sensor body (112) having a distal end (116) and an interior containing an electrolytic fill solution (132). A porous membrane (114) is disposed proximate the distal end (116) to allow diffusion of molecules or ions of interest. A working electrode (120) is disposed within the sensor body (112) proximate the membrane (114). A counter electrode (140) is disposed to conduct current between the counter electrode (140) and the working electrode (120). The counter electrode (140) is physically isolated from the electrolytic fill solution (132). A method (200) of measuring a concentration of the molecules or ions ofinterest is also provided.