Polymeric electrolytic hygrometer

Details Polymeric electrolytic hygrometer Polymeric electrolytic hygrometer

1976-12-21

1978-04-11

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

733365, G01N 2746

Patent

active

040837653

ABSTRACT:
An improved flow-through electrolytic hygrometer is provided which utilizes a long lasting oxidation-resistant, hollow fiber formed of a persulfonic acid substituted polytetrafluoroethylene having closely spaced noble metal electrodes in contact with the inner and outer surfaces of the fiber. The fiber is disposed within a chamber such that the moisture-bearing gas passes in contact with at least one surface of the fiber. The electrodes are connected in series to a DC voltage supply and an ammeter. As the gas passes through the chamber, moisture absorbed into the wall of the fiber is electrolyzed to hydrogen and oxygen by the closely spaced electrodes. The amount of electricity required for electrolysis is proportional to the absorbed moisture and is observed on the ammeter.

REFERENCES:
patent: 3001918 (1961-09-01), Czuha
patent: 3291705 (1966-12-01), Hersch
patent: 3432403 (1969-03-01), Glass et al.
"XR Perfluorosulfonic Acid Membranes", New Product Information, Dupont de Nemours & Co., Oct., 1969, pp. 1-3.

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