Humidity sensor

Details Humidity sensor Humidity sensor

1982-08-19

1983-12-20

Niebling, John F.

Electricity: electrical systems and devices

Miscellaneous

338 35, H01G 900

Patent

active

044221290

ABSTRACT:
A humidity sensor which varies in electrical impedance with variations in humidity in the atmosphere in which it is placed comprising a ceramic body, at least a pair of spaced electrodes disposed on said ceramic body in electrical contact therewith, and an electrical contact on each said electrode, said ceramic body being an electrolyte comprised of Na.sub.1+x Si.sub.x Zr.sub.2 P.sub.3-x O.sub.12, where x has a value ranging from 1.5 to 2.8, said ceramic body having a density of at least about 90% of the theoretical density for said Na.sub.1+x Si.sub.x Zr.sub.2 P.sub.3-x O.sub.12, each said electrode being in the form of a continuous interconnecting network which forms at least a sufficient plurality of non-linear recesses with the surface of the ceramic body exposing said ceramic body surface to said atmosphere to produce a measurable electrical impedance change when said atmosphere varies in relative humidity.

REFERENCES:
patent: 4041437 (1977-08-01), Matsuura
patent: 4049891 (1977-09-01), Hong
patent: 4280115 (1981-07-01), Farrington
patent: 4322485 (1982-03-01), Harrison

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