Chemistry: electrical and wave energy – Apparatus – Electrolytic
Reexamination Certificate
2008-07-29
2008-07-29
Olsen, Kaj K (Department: 1795)
Chemistry: electrical and wave energy
Apparatus
Electrolytic
C204S424000, C204S431000
Reexamination Certificate
active
10738858
ABSTRACT:
A miniaturized gas sensor including film type electrodes, and a solid ionomer electrolyte, for the detection of toxic gases, i.e., carbon monoxide, and other oxidizable or reducible gases and vapors is described. The all-solid planar sensor cell has two or more film type electrodes arranged on a non-conductive planar surface of a supportive material. The electrodes are discrete and in intimate contact with the same solid polymer ionomer membrane. The sensor cell contains no liquid electrolyte and is operated in a potentiostatic or potentiodynamic mode. The unique feature of the sensor cell is that high sensitivity to a select gas or vapor is achieved by a novel three-phase contact area design for a sensing electrode which is easily accessible to the gas sample via small diffusion openings or holes that penetrate through the solid polymer ionomer membrane layer above the sensing electrode. A significant signal to background noise enhancement is achieved for these film type sensor cells by processes that increase the three-phase contact area.
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Giner Jose D.
LaConti Anthony B.
Manoukian Mourad
Prohaska Otto J.
Olsen Kaj K
PerkinElmer LAS, Inc.
St. Onge Steward Johnston & Reens LLC
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