A new capacitive precision liquid-level gauge has been developed. The sensor consists of a low-cost planar electrode structure, a capacitance-controlled oscillator and a microcontroller. The device is able to measure absolute levels of conducting and nonconducting liquids with a 1 mm uncertainty over a 4 m range. The system has a high resolution of 0.1 mm at short measuring times of only 0.2 s. Slow level movements of 0.02 mm/h can be detected within 18 min.
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机译：已经开发出一种新的电容式精密液位计。该传感器由低成本的平面电极结构，电容控制的振荡器和微控制器组成。该设备能够在4 m的范围内以1 mm的不确定度测量导电和非导电液体的绝对水平。该系统在仅0.2 s的短测量时间内具有0.1 mm的高分辨率。在18分钟内可以检测到0.02 mm / h的缓慢运动。
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