Patent ID: 9506893
Filing Date: 2016-11-29
CPC Classification: G01N

Claim Text:
1. A potentiometric probe for measuring a measured variable of a medium in a container comprising: a housing, which has a first chamber in which a reference half-cell is formed, which is in communication with a medium surrounding said housing via an outwardly lying electrolytic contact location arranged in a wall of said housing, wherein; said housing has a second chamber, in which a measuring half-cell is formed, said second chamber is closed on one end by a measuring membrane, such that a surface area of said measuring membrane facing away from said second chamber is in contact with the medium surrounding said housing, wherein the housing further includes a closure element that at least partially defines the reference half-cell and the measuring half-cell; said first chamber is an annular chamber surrounding said second chamber, said measuring half-cell has a lengthwise extension between said measuring membrane and the closure element bounding said measuring half-cell on an end lying opposite said measuring membrane; a quotient of a separation distance of said measuring membrane from said closure element and an outer diameter of said housing is at least 0.1 to less than 2, said reference half-cell includes a reference electrolyte accommodated in said first chamber and a reference electrode immersed therein, which is connected with a first contact location arranged outside of the first chamber, said measuring half-cell includes an internal electrolyte accommodated in said second chamber and immersed therein, a potential sensing electrode, which is connected with a second contact location arranged outside of said second chamber; and said first and second contact locations are embodied, in each case, as conductive coatings on an outside of the closure element, wherein the closure element on whose outside said contact locations are arranged as conductive coatings, is embodied as a circuit card, which includes vias, by way of which said potential sensing electrode and said reference electrode are connected with said first and second contact locations, and said first and second contact locations are formed as printed, conductive traces or contact surfaces on the circuit card.