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芬兰维萨拉公司 (Ｖａｉｓａｌａ)推出了新一代高精密湿度 /露点测量仪ＤＭ5 0 0。它的测量原理与传统的冷镜式露点仪不完全相同 ,是通过高灵敏的表面声波ＳＡＷ (ＳｕｒｆａｃｅＡｃｏｕｓｔｉｃＷａｖｅ)探测露、霜、盐积的状态。其基本原理是在压电石英晶片上嵌入发送天线和
Vaisala Finland has introduced the DM5 0 0, a new generation of high-precision humidity / dew point measuring instruments. Its measuring principle is not exactly the same as that of the traditional chilled mirror dew point meter. It detects the state of dew, frost and salinity through the SAW (Surface Acoustic Wave) with high sensitivity. The basic principle is embedded in the piezoelectric quartz chip transmit antenna and