Modulating polarization voltage of amperometric sensors

Details Modulating polarization voltage of amperometric sensors Modulating polarization voltage of amperometric sensors

G - Physics

01

N

G01N 27/416 (2006.01) G01N 27/404 (2006.01) G01N 27/407 (2006.01) G01N 27/417 (2006.01)

Patent

CA 2737909

The service life of amperometric electrochemical oxygen sensors is increased by operating the electrodes of such sensors at a polarization voltage suitable for measuring the oxygen content of samples only during calibration or when measuring such samples and thereafter modulating the polarization voltage to a lower voltage such that substantially no electrical current is produced by the electrodes.

Selon linvention, il est possible de prolonger la durée de vie utile de détecteurs électrochimiques doxygène ampérométriques en faisant fonctionner les électrodes de ces détecteurs à une tension de polarisation adaptée à la mesure de la teneur en oxygène déchantillons uniquement au cours de létalonnage ou lors de la mesure de ces échantillons en réduisant ensuite progressivement la tension de polarisation de façon à ce que les électrodes ne produisent sensiblement plus de courant électrique.

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