US 12,072,312 B2
Combination electrode having extended reference chamber
Gabriela Fisch, Chur (CH); Theo Gaupp, Untervaz (CH); Dirk Schoenfuss, Bonaduz (CH); and Claudius-Michael Ortega Schulte, Bonaduz (CH)
Assigned to Hamilton Bonaduz AG, Bonaduz (CH)
Filed by Hamilton Bonaduz AG, Bonaduz (CH)
Filed on Jun. 11, 2021, as Appl. No. 17/345,656.
Application 17/345,656 is a continuation in part of application No. PCT/EP2019/084420, filed on Dec. 10, 2019.
Claims priority of application No. 102018132131.7 (DE), filed on Dec. 13, 2018.
Prior Publication US 2021/0302352 A1, Sep. 30, 2021
Int. Cl. G01N 27/403 (2006.01); G01N 27/30 (2006.01); G01N 27/36 (2006.01)
CPC G01N 27/301 (2013.01) [G01N 27/302 (2013.01); G01N 27/36 (2013.01); G01N 27/4035 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A combination electrode comprising:
an outer tube;
an inner tube disposed within the outer tube, wherein the inner tube has a closed first inner tube longitudinal end and a second inner tube longitudinal end, and wherein a reference chamber is formed between the inner tube and the outer tube;
a first seal disposed inside the inner tube closer to the first inner tube longitudinal end than to the second inner tube longitudinal end, wherein an extended reference chamber is formed inside the inner tube between the first seal and the second inner tube longitudinal end;
a first electrically conductive fluid contained in the inner tube between the first seal and the first inner tube longitudinal end;
a through-hole disposed in the inner tube between the first seal and the second inner tube longitudinal end;
a second electrically conductive fluid contained in the reference chamber and in the extended reference chamber, wherein the through-hole is adapted to allow the second electrically conductive fluid to flow between the reference chamber and the extended reference chamber;
a working electrode that extends into the inner tube, through the first seal and into the first electrically conductive fluid; and
a reference electrode that is in contact with the second electrically conductive fluid.