Patent ID: 6361670
Filing Date: 2002-03-26
Classification: G01N

Abstract:
A device for the coulometric determination of water by means of a Karl Fischer reaction, comprising a membrane-free measuring cell (1) that contains a Karl Fischer liquid reagent, an iodine indicating means (2,3), and an anode (4) and a cathode (5) that are spaced mutually apart and extend down into the liquid reagent, characterized in that the device further includes a casing (6) which is disposed around the cathode (5) to screen-off in the measuring cell (1) a cathode space (7) between the inner surface of the casing and the cathode; in that the casing (6) includes an opening (8) through which the cathode space (7) is placed in communication with measuring-cell liquid reagent that penetrates to a level in the cathode space; and in that a maneuverable drainage device (9, 10), including a plunger, is provided in the proximity of the casing and functions to drain-off cathode space liquid reagent through said opening when said plunger is actuated in this sense.