Oxygen analyzer probe

An oxygen analyzer probe for use in situ in a flue gas stream of a furnace of the type having a housing with a first end adapted to be situated in said furnace and a second end adapted to be external thereto, a solid electrolytic oxygen sensor adjacent said first end of said housing, a first electrode on one side of said sensor, a second electrode on the other side of said sensor, a first noble metal lead connected to said first electrode and a second noble metal lead connected to said second electrode, the improvement comprising:

• a terminal block within said housing, said terminal block being more proximate to said first than to said second end, said first and said second noble metal leads being releasably connected to said terminal block;
• first and second intermediate leads connected to said first and said second noble metal leads respectively at said terminal block, said first and said second intermediate leads being comprised of a metal dissimilar to said first and said second noble metal leads, and
• an electrical connector external to said housing, said intermediate leads being electrically connected to an oxygen analyzer circuit at said connector.