Oxygen sensor

Details Oxygen sensor Oxygen sensor

2008-05-13

2008-05-13

Williams, Hezron (Department: 2856)

Measuring and testing

Probe or probe mounting

Reexamination Certificate

active

07370545

ABSTRACT:
An oxygen sensor includes a sensing element detecting an oxygen concentration in a measurement gas that flows in a pipe, a cylindrical protector which covers an outside of the sensing element and whose top end portion projects toward an inside of the pipe. An outside diameter D of the protector and a projection amount L of the protector inside the pipe are set so that a ratio of the product of the outside diameter D and the projection amount L (D×L) to a cross-sectional area S of a flow passage of the pipe becomes substantially smaller than or equal to 2.5%.

REFERENCES:
patent: 4939468 (1990-07-01), Takeuchi
patent: 6263748 (2001-07-01), White
patent: 2006/0272944 (2006-12-01), Ichiyanagi et al.
patent: 11-337513 (1999-12-01), None

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