| 摘要 |
<p>A capacitive sensor is described having an element (10) which traverses the outside of a container (16) of liquid to ascertain the vertical locations of liquid interfaces in the container. The sensor uses an oscillator (30) whose amplitude or phase is a function of the capacitance of the element. The change of amplitude or phase denotes a liquid interface and the sensor element is translated parallel to the axis of the container. <IMAGE></p> |
