Patent ID: 7186325

Claim:
A pressure-resistant reference electrode for electrochemical measurements, comprising: a half cell; a primary current bridge for closing an electrochemical contact between the half cell and a measurement medium, which current bridge contains a primary electrolyte, wherein the half cell has both a reference electrolyte and a lead-off element, dipped into the reference electrolyte, which are disposed in a half-cell chamber that is provided with a primary junction leading to the primary current bridge and is otherwise embodied as medium-proof, the half-cell chamber having a flexible wall region which is embodied such that a pressure difference between the primary current bridge and the half cell can be compensated for essentially without convection through the primary junction; and two wall parts, spaced apart essentially in plane-parallel fashion, which are disposed on a framelike spacer located between them, at least one of the wall parts being formed by a film that forms the flexible wall region, the spacer being divided by a middle rib into a half-cell region and a current bridge region, and the primary junction being formed by a recess in the middle rib that is equipped with a convection- inhibiting filling.