[특허]Electrochemical gas sensor cells

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IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01N-027/416
출원번호	US-0513441 (1990-04-16)
발명자 / 주소	Tomantschger Klaus (Mississauga NY CAX) Janis Allan A. (Amherst NY) Weinberg Norman L. (Amherst NY) Rait Joseph M. (Buffalo NY)
출원인 / 주소	Minitech Co. (Buffalo NY 02)
인용정보	피인용 횟수 : 41 인용 특허 : 0

초록 ▼

An electrochemical gas sensor cell is provided, the use of which permits quantitative measurement of volatile gas contaminants in an atmosphere being monitored, generally at ambient temperatures below 100°C. The cell comprises at least a first sensor electrode and a second counter electrode, on either side of an electrolyte which may be immobilized in a matrix, or a polymer electrolyte. The sensing electrode has a catalyst dispersed on a porous base, and is mounted in such a manner as to be exposed to the atmosphere which is to be sensed for gaseous contaminants, with the counter electrode being isolated from any exposure to that atmosphere. Generally, the electrodes are mounted in electrically conductive plastic frames, sandwiching a third non-conductive frame member in which the electrolyte is located. In an alternative embodiment, a further reference electrode may be mounted so as to be exposed to the electrolyte. The porous electrode may comprise a porous base layer, a catalytically active metal (usually a noble metal), carbon, and a polymeric hydrophobic binder.

대표청구항 ▼

An electrochemical gas sensor cell for quantitative measurement of gaseous or volatile contaminants in an atmosphere being monitored, said gas sensor cell comprising at least a first gas permeable porous sensor electrode mounted in a first frame member, a second gas permeable porous counter electrode mounted in a second frame member, a third electrically non-conductive frame member, an ion conductive electrolyte contained within an electrolyte chamber formed in said third frame member, said first and second electrodes and said first and second frame members being located at first and second sides, respectively, of said electrolyte such that at least a portion of each of said first electrode and said second counter electrode contact said electrolyte; wherein at least one of said first and second frame members is electrically conductive, and conductor means is associated with the other of said first and second frame members when said other frame member is electrically non-conductive; wherein said electrolyte is retained in said third frame member in such a manner as to substantially accomodate changes in temperature or humidity of said atmosphere; wherein said first sensor electrode and optionally also said second counter electrode contains a catalyst; each of said first, second, and third frame members being formed of an inert plastics material which is impervious to said electrolyte; said sensor electrode being mounted and secured with respect to said first frame member so as to be exposed to said atmosphere, and said counter electrode being mounted and secured with respect to said second frame member so as to be isolated from any exposure to said atmosphere; and wherein each of said first and second electrodes is connected to electrical measurement means; whereby, when said atmosphere contains a gas contaminant for which the catalyst on said sensor electrode is chosen to produce a change in electrical potential with respect to said counter electrode when said sensor electrode is exposed to said gas contaminant in the presence of the chosen ion conductive electrolyte, said electrical measurement means detects the change of said electrical potential, which thereby is indicative of the presence of said gas contaminant.

이 특허를 인용한 특허 (41)

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Addiego William P., Metal oxide semiconductor catalyst hydrocarbon sensor.
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