Gas sensor with slotted diffusive gas sample chamber

Details Gas sensor with slotted diffusive gas sample chamber Gas sensor with slotted diffusive gas sample chamber

2005-04-19

2005-04-19

Rosenberger, Richard A. (Department: 2877)

Optics: measuring and testing

For light transmission or absorption

Of fluent material

C356S437000

Reexamination Certificate

active

06882426

ABSTRACT:
A diffusion-type gas sensor is disclosed. The sample chamber uses a narrow slot as a gas diffusion port. The slot is advantageous as it can be formed during extrusion of chamber stock material, instead of during subsequent machining steps that are costly and may adversely affect the chamber surfaces. Further, the slot profile can be designed according to various profiles and/or positions that can improve gas diffusion, chamber reflection efficiency, or both, as compared to conventional ported chamber designs.

REFERENCES:
patent: 3702397 (1972-11-01), Firth et al.
patent: 4323777 (1982-04-01), Baskins et al.
patent: 4662755 (1987-05-01), Aoki et al.
patent: 5125742 (1992-06-01), Wilks, Jr.
patent: 5163332 (1992-11-01), Wong
patent: 5874737 (1999-02-01), Bytyn et al.

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