pH Monitor electrode electrolyte cartridge

Claim 1

A disposable probe tip attachable to an electrode cell to make up a probe assembly used to make a continuous determination of ion concentrations in living tissues wherein the electrode cell has a thin protruding tube and having an ion sensitive membrane on the tip of the tube, the tube having a conductor around the outside thereof but not extending to the membrane, wherein said disposable probe tip comprises: a housing having a hollow chamber therein and having a first and a second opening communicating with said hollow chamber, an electrolyte solution within the chamber of said housing, first means sealing said first opening, second means sealing said second opening and cooperating with said first sealing means to seal said electrolyte within said chamber, a tip piece with a passage therethrough having a diameter only slightly larger than the diameter of said tube, said tip piece being attached to said housing so as to hold said first sealing means up against said first opening and so that said first and said second openings are coaxial with the axis of said tip piece passage, the tip of said tube first penetrating said second sealing means, then passing through said electrolyte solution, penetrating said first sealing means and then passing through said passage and exiting therefrom as said disposable probe tip is attached to said electrode cell.