Electrical resistors – Resistance value responsive to a condition – Gas – vapor – or moisture absorbing or collecting
Patent
1989-07-27
1991-09-03
Lateef, Marvin M.
Electrical resistors
Resistance value responsive to a condition
Gas, vapor, or moisture absorbing or collecting
204430, 428421, H01C 700
Patent
active
050458280
ABSTRACT:
A humidity sensor composed of interdigitated electrodes and a material therebetween which is composed of perfluorosulfonic acid substituted poly (tetrafluoroethylene) copolymer wherein H+ sites have undergone ion exchange with at least one of NH4+ and Li+, Na+, Ag+ and Mg+.
REFERENCES:
patent: 3961301 (1976-06-01), Fraioli
patent: 4483694 (1984-11-01), Takamura et al.
patent: 4900405 (1990-02-01), Otagawa et al.
patent: 4915816 (1990-04-01), Shakkotai et al.
Conlan Thomas C.
Kulwicki Bernard M.
McGovern Robert T.
Haug John A.
Lateef Marvin M.
McAndrews James P.
Sharp Melvin
Texas Instruments Incorporated
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