Apparatus for sensing combustible gases employing an oxygen-acti

Details Apparatus for sensing combustible gases employing an oxygen-acti Apparatus for sensing combustible gases employing an oxygen-acti

1995-06-02

1997-06-03

Housel, James C.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing gas sample

422 90, 422 98, 422 94, 436151, 436137, 73 2331, 73 3105, G01N 3095

Patent

active

056351364

ABSTRACT:
A combustible gas sensor having a noble metal sensor element with a surface that is heated above a critical temperature at which the surface is able to dissociate oxygen in a gas stream and adsorb the oxygen onto its surface. The adsorbed oxygen present on the noble metal surface enhances the reactivity of the sensor element and permits it to react with combustible gases that otherwise would have little or no affinity for the sensor element. The balance of adsorbed oxygen and combustible gas species on the sensor surface cause a change in an electrical property that is used to determine the presence or identity of a combustible gas, or to derive a concentration measurement. The electrical property measured to determine the presence, identity, or concentration of combustible gas includes the work function of the noble metal surface, which may be measured by incorporating the sensor element as a component of a variable capacitor contained in an electrical circuit adapted to measure change in current caused by the change in capacitance of the variable capacitor.

REFERENCES:
patent: 3989463 (1976-11-01), Klein et al.
patent: 4686847 (1987-08-01), Besocke
patent: 4724008 (1988-02-01), Bell et al.
patent: 4828673 (1989-05-01), Maeda
patent: 4883959 (1989-11-01), Hosoki et al.
patent: 4953387 (1990-09-01), Johnson et al.
patent: 5386715 (1995-02-01), Evans et al.

Affiliated with

Also associated with

Rating

Apparatus for sensing combustible gases employing an oxygen-acti does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for sensing combustible gases employing an oxygen-acti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for sensing combustible gases employing an oxygen-acti will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-389114