G - Physics – 01 – N
Patent
G - Physics
01
N
324/25
G01N 27/56 (1985.01)
Patent
CA 1225434
ABSTRACT The invention is, in part, a unique, solid electro- lyte-integral cell electrode/heater configuration which pro- vides a zone of uniform maximum heating at a predetermined location within the electrolyte and which, when used with a suitable resistive heating electric current, confines the current to the integral electrode/heater prolonging cell life. Another aspect of the invention is the use of a radio frequency alternating electric current for resistively heating an electrochemical cell. Preferably, the radio frequency selected is sufficiently high so as to eliminate any offsets in the emf developed by the cell which are caused by the heater current. The invention also includes an apparatus for measuring the concentration of particular gases, such as oxygen, incorporating either and, preferably, both other inventive aspects of the invention. The preferred cell configuration reduces the complexity of such an apparatus by eliminating the auxiliary heat source and provides a more accurate and reliable electrochemical sensing cell. Radio frequency heating allows the operations of cell heating and emf measurement to proceed independently and concurrently and provides a continuously responding, self-heating detection apparatus.
447373
Brouneus Harold A.
Kane William T.
Layton Margaret M.
Corning Glass Works
Sim & Mcburney
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