Miniature gas sensor

Details Miniature gas sensor Miniature gas sensor

1991-10-21

1994-02-08

Niebling, John

Chemistry: electrical and wave energy

Apparatus

Electrolytic

73 3105, 20415313, 204426, 204431, G01N 27407

Patent

active

052845699

ABSTRACT:
A miniaturized, portable sensor is provided for selectively sensing the presence of halogenated gases, particularly HFC's, within an atmosphere. The apparatus includes a ceramic element containing either a mixture of potassium silicate and either aluminum oxide or silicon dioxide which react with ions of the halogenated gas when the two are brought together forming a depletion layer on and within the ceramic. The sensor is formed with two electrodes on opposite sides of the ceramic having terminals connected into a circuit for detecting a potential difference across the depletion layer. Means are provided for detecting the potential differences and for producing a discernable signal in response thereto.

REFERENCES:
patent: 3751968 (1973-08-01), Loh et al.
patent: 3979625 (1976-09-01), Roberts
patent: 3991360 (1976-11-01), Orth et al.
patent: 4129418 (1978-12-01), Davis
patent: 4171341 (1979-10-01), Morgan
patent: 4470882 (1984-09-01), Katsura et al.
patent: 5104513 (1992-04-01), Lee et al.

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