Patent ID: 8603311
Filing Date: 2013-12-10
Classification: G01N

Abstract:
1. A pH measuring device ( 1 ) comprising: a) a reference cell including: a tank filled with an electrolyte solution; a platinized platinum reference electrode immersed in the tank; and a first circulation circuit extending through the tank; b) a measuring cell including: a platinized platinum measuring electrode to be immersed in the solution being measured; and a second circulation circuit independent from the first circulation circuit extending from the circulation of the reference cell configured so that cross chemical contamination is prevented; c) a temperature regulator configured to maintain the same temperature in the reference cell and the measuring cell; d) a partial pressure regulator configured to maintain the same hydrogen partial pressure in the reference cell and the measuring cell, wherein the partial pressure regulator is configured to independently control the partial pressure in each cell; and e) a fluid pressure regulator configured to maintain the same pressure in the reference cell and the measuring cell, wherein the fluid pressure regulator is configured to independently control the fluid pressure in each cell.