Relative humidity sensitive material

Details Relative humidity sensitive material Relative humidity sensitive material

1981-04-24

1983-02-15

Kazenske, Edward R.

Measuring and testing

Gas analysis

Moisture content or vapor pressure

733365, 2521871, 25218731, 252194, 252512, 252518, 252521, 338 35, 252963, H01C 1300

Patent

active

043733913

ABSTRACT:
A relative humidity sensitive material comprises a mixture of at least one hygroscopic salt and an at least partially electrically conductive metal based powder. Each salt in the relative humidity sensitive material has a cationic constituent selected from the group consisting of the alkali and alkaline earth metals and an anionic constituent selected from the group consisting of a chlorate, perchlorate, and chloro aluminate. The metal based powder preferably comprises a metal or metal oxide powder or powder mixture including such constituents as Zr, CO.sub.3 O.sub.4, and MnO.sub.2. Additionally, the material may include a binding agent and a slurry mixture may be formed for placement of the resultant material between electrodes on a substrate so as to form a relative humidity sensor. These sensors are employed either individually or configured in a system used to either indicate or control the relative humidity.

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patent: 4041379 (1977-09-01), Matsuura et al.
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