Oxygen sensing system

Details Oxygen sensing system Oxygen sensing system

2011-04-19

2011-04-19

Williams, Hezron (Department: 2856)

Measuring and testing

Instrument proving or calibrating

Gas or liquid analyzer

Reexamination Certificate

active

07926322

ABSTRACT:
A system of measuring oxygen levels based on the intensity of a sensor material. Through use of intensity-based measurement techniques and improved light rejection, less excitation light and system gain are required as compared to certain conventional lifetime/phase shift techniques. One embodiment applies an intensity-based measuring system for taking measurements, and on an intermittent basis, using a lifetime/phase shift-type sensor in order to automatically calibrate the intensity-based measuring system in situ. A single sensing membrane may be provided while still allowing the system to be used in both the lifetime/phase-shift mode and the intensity mode. The system of the present invention may also include use of a variable thickness sensor for an oxygen sensing system, such as a portable handheld sensor and/or a sensor or controller at a fixed location.

REFERENCES:
patent: 5060505 (1991-10-01), Tury et al.
patent: 5887048 (1999-03-01), Sata et al.
patent: 6205272 (2001-03-01), O'Rourke et al.
patent: 2006/0018045 (2006-01-01), Moeller et al.

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