Humidity sensor

Details Humidity sensor Humidity sensor

1975-09-25

1977-05-10

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

733365, 324 65P, 360 74, 360130, G11B 2102, G11B 1518, G11B 1560, G01W 102

Patent

active

040232069

ABSTRACT:
A humidity sensor is formed by a pair of electrodes fitted on the surface of a flexible insulator film such as a polyester film, the pair of electrodes being arranged adjacent to one another with a suitable gap therebetween. Within the gap between the adjacent electrodes, a rough surface portion is formed on the insulator and/or the electrodes so that condensed dewdrops on the gap are automatically dispersed, and accordingly the sensitivity of the humidity sensor is improved.
A video tape recording and/or reproducing apparatus is also disclosed which employs the humidity sensor described above. In this case, the humidity sensor is mounted on the tape guide drum of the video tape recording and/or reproducing apparatus for detecting the humidity thereon.

REFERENCES:
patent: 2735907 (1956-02-01), Inman
patent: 2937524 (1960-05-01), Gregor
patent: 2976188 (1961-03-01), Kohl
patent: 3696360 (1972-10-01), Gajewski

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