Solid state sensor

Details Solid state sensor Solid state sensor

1977-10-12

1979-10-16

Kreitman, Stephen A.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing gas sample

73 23, G01N 3104

Patent

active

041713419

ABSTRACT:
Method and apparatus for selectively sensing the presence of a given constituent within an atmosphere. The apparatus includes a solid state element containing alkali metal ions that react with ions of the given constituent when the two are brought together. The solid state element is housed within a shield that functions as an ion control screen when heated to a predetermined temperature in the presence of a gas or vapor of the given constituent to selectively pass ions of the given constituent into reactive contact with the solid state element housed therein. Circuit means are further provided for detecting a flow of ions through the shield and for producing a discernible signal in response thereto.

REFERENCES:
patent: 3751968 (1973-08-01), Loh et al.
patent: 3979625 (1976-09-01), Roberts
patent: 3986111 (1976-10-01), Sellers
patent: 3991360 (1976-11-01), Orth et al.

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