Electrochemical determination of components in gas mixtures

Claim 1

IN A GALVANIC DETECTOR CELL FOR USE IN MEASURING THE CONCENTRATION OF A DEPOLARIZING COMPONENT OF A GASEOUS MIXTURE, THE COMBINATION COMPRISING A POLARIZABLE TUBULAR POROUS ELECTRODE THE WALL OF WHICH IS SUBSTANTIALLY IMPERVIOUS TO THE ELECTROLYTE IN THE CELL BUT PERVIOUS TO THE GASEOUS MIXTURE, THE ELECTRODE BEING CLOSED AT ONE END THAT IS ADAPTED TO BE IMMERSED IN THE ELECTROLYTE AND OPEN AT THE OTHER END, AND A TUBE RECEIVED IN THE OPEN END OF THE ELECTRODE AND EXTENDING SUBSTANTIALLY THE FULL LENGTH OF THE ELECTRODE BORE WITH THE INNER END OF THE TUBE ADJACENT THE CLOSED END OF THE ELECTRODE, THE TUBE HAVING A CROSS SECTIONAL AREA THAT WILL LEAVE ONLY A NARROW PASSAGE BETWEEN THE OUTSIDE OF THE TUBE AND THE WALL OF THE ELECTRODE, THE TUBE AND PASSAGE FORMING A CONTINUOUS CONDUIT FOR INTRODUCING THE GASEOUS MIXTURE INTO THE BORE OF THE ELECTRODE AND FOR WITHDRAWING THE MIXTURE THEREFROM.