首页>
外国专利>
Sensing element for measuring moisture, especially for measuring high values of relative humidity up to 90 percent and at temperature values above 80 degC, and process for producing thereof
Sensing element for measuring moisture, especially for measuring high values of relative humidity up to 90 percent and at temperature values above 80 degC, and process for producing thereof
The solution subject is the improvement to a known sensor for measuring humidity, including system interdigital conductive electrodes of Changing humidity changes around its electrical conductivity and provided with at least one sensor thin surface layer of organic material, phthalocyanine of formula (I) wherein M is H.sub.2 .n., Zn, hoal, Ni, Cu; and Ri1, Ri2, Ri3, R.sub.4.n.nezávisle -H, -SO.sub.3.nH, - SO.sub.3.n.Na, -SO.sub.3.nK, -SO.sub.3.n.Li, -SO.sub.3.n.NH.sub.4.n. - SO.sub.2.n.NH.sub.2.n .. sensor layer according to the solution is sandwiched, whereby the first layer is applied to the second layer comprises at least one sulfonamidickým phthalocyanine derivative of formula (II) wherein M represents H.sub .2.n., Zn, hoal, Ni, Cu; and Ri1, Ri2, Ri3, R.sub.4.n.nezávisle -H, -SO.sub.3.nH, - SO.sub.3.n.Na, -SO.sub.3.nK, -SO.sub.3.n.Li, -SO.sub.3.n.NH.sub.4.n. - SO.sub.2.n.NH.sub.2.n., -SO.sub.2.n.NHCH.sub.2.n.CH.sub.2.n.CH.sub.2.nN ( C.sub.2.nHsub.5.n.). sub.2.n., -SO.sub.2.n.NHCH.sub.2.n.CH.sub.2.n.CH.sub. 2.nN (CH.sub.3.n.). sub.2.n., -SO.sub.2.n.NHCH.sub.2.n.CH.sub.2.n.NHCH.sub. 2.n.CH.sub.2.n.OH - -SO.sub.2.n.NH (CHi2.). Sub.17.n.CH.sub.3.n .; mixed with polystyrene, or polystyrene alone. Layer is applied as a solution or suspension in a polar or apolar solvent or in the binder based on organic material, wherein the solvent or binder is evaporated. Sensors for measuring humidity exhibits a rapid and reproducible response, high sensitivity and long term stability in the range from 20% to 90% relative humidity at temperatures of 30 degC to 85 degC. .sub. .n.
展开▼
