| 摘要 |
A process and apparatus for detecting changes in interface level between distinct materials within a container independent of any chemical or physical changes taking place within either or both of the distinct materials. Sensors are introduced into each of the materials and an additional sensor is placed across the interface, the output from each of the three sensors is transmitted to an adaptive detector device which combines these outputs by means of a control equation to give an emanating signal proportional solely to the position of the interface within the container.
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