Patent ID: 6869511

Claim:
A sensor probe for use in monitoring electrochemical potentials, comprising: (a) a crucible made of ceramic material having a closed end and an open end, the closed end containing metal/metal oxide powder mixture retained therein by mineral insulation packing, said open end having a metallized band comprised of platinum particles fired in the ceramic material; (b) an annular metal sleeve formed of a metal exhibiting a coefficient of thermal expansion compatible with said crucible, and having a distal open end brazed to said open end of said crucible, and a proximal open end; (c) an insulated electrical conductor having a distal end in electric connection with said metal/metal oxide powder and extending through said mineral insulation packing and into said first annular sleeve, and having a proximal end terminating near the proximal open end of said annular sleeve; and (d) a signal transfer assembly sealingly associated with said proximal end of said annular sleeve including an electrical cable connected to said electrical conductor.