Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1992-09-30
1994-07-05
Niebling, John
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204406, 204412, 204415, 204431, 204432, 20415317, G01N 2726
Patent
active
053264479
ABSTRACT:
An analyzer for detecting a selected chemical (such as oxygen) in a process fluid includes a plurality of electrodes that are separated from the fluid by a membrane that is permeable to the selected chemical, each of the electrodes when energized producing a signal in response to the selected chemical in the fluid. The selected chemical level in the process fluid is determined based on the signal produced by a first one of the electrodes, and the determined level is used with the signal produced by a second one of the electrodes to detect whether the membrane has become faulty (e.g., fouled by materials in the process fluid).
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Smart et al., In Situ Voltammetric Membrane Ozone Electrode; 1979; Analytical Chemistry; vol. 51, No. 14, pp. 2315-1319.
Michael L. Hitchman; Measurement of Dissolved Oxygen; 1978; Zurich, Switzerland, Chapters 4 and 5, pp. 59-123.
Bell Bruce F.
Niebling John
The Foxboro Company
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