Probe for selectively detecting vapors, water vapor in particula

Details Probe for selectively detecting vapors, water vapor in particula Probe for selectively detecting vapors, water vapor in particula

1977-02-10

1979-02-20

Kaplan, G. L.

Electrical resistors

Resistance value responsive to a condition

Gas, vapor, or moisture absorbing or collecting

204195W, 324 29, 324 71R, 324158P, G01N 2746, G01N 2760, G01N 2700

Patent

active

041409906

ABSTRACT:
A probe for selectively detecting a vapor component in a gaseous atmosphere in contact therewith. The probe includes a pair of measuring electrodes and a semiconductor layer which is coated with a dielectric layer. An auxiliary electrode is placed opposite the semiconductor layer so that the voltage can be varied and consequently the level of the average current can be adjusted. It is thereby possible to detect the concentration of a vapor component to be measured in the entire range and with the same sensitivity.

REFERENCES:
patent: 3223609 (1965-12-01), Reeds
patent: 3954590 (1976-05-01), Czuha

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