Patent
Humidity-sensitive element
Tooru Sugawara,Shigeki Tsuchitani,Noriyuki Kinjo,Shuichi Ohara +3 more
- 20 Jul 1981
25
TL;DR: The humidity-sensitive element of as mentioned in this paper is composed of an insulating substrate (1), a pair of electrodes (2, 3) mounted thereon, and a humidity sensitive material (8) covering the electrodes.
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Abstract: The humidity-sensitive element of this invention is composed of an insulating substrate (1), a pair of electrodes (2, 3) mounted thereon, and a humidity-sensitive material (8) covering the electrodes. The humidity-sensitive material (8) has a property to change its electric resistance depending on the moisture content in the atmosphere and is formed from fine particles each having a hydrophobic core and a hydrophilic group-containing surface layer covering the core. This humidity-sensitive element exhibits a nearly linear relationship between logarithum of electric resistance and relative humidity and small hysteresis, permitting a precise measurement of relative humidity. Insulating substrate (1) and electrodes (2,3) are preferred to form from an insulating layer of silicon semiconductor and conductive monosilicon formed on it, respectively. This permits size reduction of humidity-sensitive elements or devices.
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Citations
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References
Patent
Humidity sensitive device
Michihiro Murata,Shinsei Okabe +1 more
- 27 Jun 1979
TL;DR: In this article, a mixture of conductive or semiconductive powder, a solid electrolyte powder and an organic polymer cross-linked by a zirconium compound was used to create a humidity sensitive device.
37
Patent
Humidity sensor and a humidity detection circuit using the humidity sensor
Kinomoto Shinichi,Kawamura Masato,Kobayashi Susumu +2 more
- 20 Jun 1979
TL;DR: In this paper, a humidity sensor as well as a humidity detection circuit are disclosed, the former employing a humidity sensitive material the electric resistance of which varies in response to the variance of humidity in an atmosphere.
30
Patent
Humidity sensing element
Takashi Wakabayashi,Kanji Sugihara +1 more
- 07 Sep 1973
TL;DR: In this article, a humidity sensing element has a humidity sensitive film which has finely divided conductive particles dispersed in a resin consisting essentially of a reaction product of a chlorine containing polymer and a polyamide resin.
19
Patent
Aging-proof humidity sensing element and method for the production thereof
Mamiya Shigeo,Yajima Ryoichiro +1 more
- 18 Mar 1970
TL;DR: In this article, the micro-gaps between said particles are filled up with a hydrophilic high polymer, thereby minimizing the deterioration by aging, which shows a substantially constant electric resistance at a given humidity even with the passage of a long period of time, thereby enabling a hydrometer capable of exactly indicating humidity with high durability to be provided.
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