Electroanalytical transducers

Details Electroanalytical transducers Electroanalytical transducers

1977-03-01

1978-06-20

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

204195R, G01N 2730, G01N 2746

Patent

active

040960471

ABSTRACT:
Electroanalytic transducers for electrochemical analysis of chemical substances are disclosed. The transducers are of the type which include electrodes contacting an electrolyte solution. In accordance with the method and apparatus of the invention, means insulating an electrode are held in a mutually pressing engagement over preselected portions of the electrode to insulate that portion from the electrolyte and prevent creep of the electrolyte between the insulating means and the preselected portions. Thus, the surface area of the electrode exposed to the electrolyte is maintained substantially constant during the service life of the transducer. In a preferred embodiment, sensor or working and counter electrodes are coaxially mounted and circumferentially coaxially separated by annular insulating means. Spring means urge the inner coaxially mounted electrode and the annular insulating means together so that only the surface of the cross-sectional end of the inner electrode is exposed to electrolyte. Thus, a working or sensing surface area of the electrode exposed to electrolyte may be maintained substantially constant during service.

REFERENCES:
patent: 2208023 (1940-07-01), Ellis
patent: 3166485 (1965-01-01), Lloyd

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