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由于环境空气的相对湿度对许多工业的物理化学过程有着重要的影响,研究灵敏、可靠的湿度传感器的人日益增加。最近的发展集中在电学方法(例如湿敏电阻,电容,或电导池)和色度法两方面。电子传感器对湿度敏感,对温度也敏感。而色度试剂如C_o~(2+)、C_u~(2+)及V~(5+)等金属块,对湿度的选择性高,但却很少或不受温度的影响。显色剂通常悬浮在胶体或吸附纸上。水合程度靠目视测量,主观性很强,不是定量的。已有报导,把显色剂涂在光学波导管
As the relative humidity of ambient air has a significant impact on the physico-chemical processes of many industries, the number of people researching sensitive and reliable humidity sensors is on the rise. Recent developments have focused on electrical methods (eg, wetting resistance, capacitance, or conductivity cell) and colorimetric methods. Electronic sensors are sensitive to humidity and temperature. Chroma reagents such as C_o ~ (2 +), C_u ~ (2+) and V ~ (5+) and other metal blocks, high humidity selectivity, but with little or no temperature. The developer is usually suspended in colloidal or absorbent paper. Degree of hydration by visual measurement, very subjective, not quantitative. It has been reported that the color developer is coated on an optical waveguide