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据报道:加拿大GDD仪器公司(INSTRUMENTATION GDD INC.)制造了一种电子数字水准仪(The GDD Electronic Level),它能自动测量两点间的高程差而不需要象光学水准仪那样用眼睛在标尺上读数。该仪器由两个压力传感器及一个电子数字读数器所组成,这两个压力传感器由一个充满液体的软管连接起来。敏感元件使管子内部的温度得到平衡,其输出可使液体的密度变化得到补偿,因此,在任何外界温度下都能得出精确的读数。测量高差时,只需将管端接到该水准仪上,掀动按钮,电子读数器就马上显示出读数。
It has been reported that INGEDATION GDD INC. Has created The GDD Electronic Level, which automatically measures the difference in elevation between two points without the need to read the scale on the scale with an optical level . The instrument consists of two pressure sensors and an electronic digital reader, the two pressure sensors are connected by a hose filled with liquid. The sensing element balances the temperature inside the tube and its output compensates for changes in the density of the liquid, thus providing accurate readings at any outside temperature. When measuring the height difference, simply pipe the tube to the level and tilt the button, and the electronic reader shows the reading immediately.