G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 27/49 (2006.01)
Patent
CA 2571625
A free chlorine measurement system (10) and sensor (14) are provided. In accordance with one aspect of the invention, the sensor (14) has a porous working electrode (42) disposed in an electrolyte (24) proximate a porous membrane (32). The membrane (32) allows free chlorine therethrough where it is reduced and generates a current. The current is related to the free chlorine concentration. The internal electrolyte solution (24) is pH stabilized with a long-term pH stabilizer (35) that has a solubility in water at room temperature between about 1.2 moles/liter and about 0.001 moles/liter. The stabilizer (35) can be an acid or a base depending on whether the pH is to be stabilized at a relatively low value or a relatively high value respectively.
L'invention concerne un système de mesure de chlore libre (10) ainsi qu'un capteur (14). Selon un premier mode de réalisation de l'invention, le capteur (14) comprend une électrode de travail poreuse (42) placée dans un électrolyte (24) à proximité d'une membrane poreuse (32). La membrane (32) permet le passage du chlore libre de la traverser, celui-ci y étant réduit et produit un courant reduced and generates a current. The current is related to the free chlorine concentration. The internal electrolyte solution (24) is pH stabilized with a long-term pH stabilizer (35) that has a solubility in water at room temperature between about 1.2 moles/liter and about 0.001 moles/liter. The stabilizer (35) can be an acid or a base depending on whether the pH is to be stabilized at a relatively low value or a relatively high value respectively.
Feng Chang-Dong
Garretson Joshua Steven
Xu Jishou
Marks & Clerk
Rosemount Analytical Inc.
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