Gas indicator and gas sensor sheet

Details Gas indicator and gas sensor sheet Gas indicator and gas sensor sheet

2005-02-08

2005-02-08

Alexander, Lyle A. (Department: 1743)

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Calorimeter

C422S067000, C422S085000, C422S087000, C436S164000, C073S023200

Reexamination Certificate

active

06852281

ABSTRACT:
The invention designed to provide a gas indicator which can be applied over a broad range of gas concentration from a low concentration gas to a high concentration gas is concerned with a gas indicator comprising a housing and a change-color gas sensor element with which the housing is loaded, the housing internally defining a gas passage space extending from its gate through its bottom with the area of its cross-section parallel to the plane of the gate being progressively reduced from the gate to the bottom.

REFERENCES:
patent: 4485665 (1984-12-01), Norman
patent: 4904449 (1990-02-01), Heckmann
patent: 6117685 (2000-09-01), Omatsu et al.
patent: 10-316910 (1998-12-01), None
patent: 11-83834 (1999-03-01), None
patent: 11-140360 (1999-05-01), None

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