Measuring sensor of oxygen content of hot gas with specially sha

Details Measuring sensor of oxygen content of hot gas with specially sha Measuring sensor of oxygen content of hot gas with specially sha

1991-02-07

1991-12-17

Niebling, John

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204427, 204424, 20415318, G01N 2726

Patent

active

050732471

ABSTRACT:
A protective tube of metal resistant to corrosion from hot gas surrounds and is spaced from a closed-end ceramic sensor body within which is an electrical heater. The protective tube extends beyond the end of the sensor body and has an annular groove at its open end, which bulges into the space enclosed by the tube and the outer end of which provides a flange perpendicular to the axis of the tube a fine metal screen may be provided across the open end of the tube for incepting droplets of water that may sometimes be present in the gas to be measured. The open end of the protective tube may be only slightly constricted by the groove or, in another embodiment, it may taper down in a rounded fashion to a narrower opening.

REFERENCES:
patent: 4199424 (1980-04-01), Teitelbaum
patent: 4339320 (1982-07-01), Friese et al.
patent: 4356065 (1982-10-01), Dietz
patent: 4362609 (1982-12-01), Sano et al.
patent: 4668477 (1987-05-01), Nishio et al.
patent: 4756885 (1988-07-01), Raff et al.
patent: 4842713 (1989-06-01), Stahl
patent: 4883643 (1989-11-01), Nishio et al.

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