Ozone detecting element

Details Ozone detecting element Ozone detecting element

1978-03-20

1980-05-20

Serwin, R. E.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing gas sample

422 90, 23232E, 73 27R, 324 71SN, 338 34, G01N 2704, H01C 700

Patent

active

042039460

ABSTRACT:
A detecting element for sensing the presence of higher than normal concentrations of ozone in air at ambient temperatures and pressures. The element is formed of a "lower" oxide of a semiconductor having a variable valence. In the presence of ozone, two free electrons in the conductive band of the semiconductor combine with dissociated atomic oxygen to form a "higher" oxide of the semiconductor thereby changing the conductivity of the element. At least two electrodes are placed in spaced apart contact with the element to permit a current to be passed therethrough whereby the change in conductivity can be discerned.

REFERENCES:
patent: 3611243 (1971-10-01), Hardtl
patent: 3625756 (1971-12-01), Taguchi
patent: 3695848 (1972-10-01), Taguchi
patent: 3699803 (1972-10-01), Sumi et al.
patent: 3778229 (1973-12-01), Webster et al.
patent: 4001756 (1977-01-01), Heijne
patent: 4039941 (1977-08-01), Morrison
patent: 4045178 (1977-08-01), Okinaka et al.

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