DEVICE FOR MEASURING OR CONTROLLING CHANGE OF LEVEL BETWEEN SEVERAL POINTS

摘要

A device measures or controls a change of a level or a variation in a change of a level between several points. The device includes closed vessels (2) placed respectively at each of the points. The vessels are partially filled with a liquid (53) and are connected by liquid pipes emerging in their lower portion so as to form a liquid circuit (31) and by gas pipes emerging in their upper portion so as to form a gas circuit (36). Each vessel is equipped with a capacitive proximity sensor (11) placed above and at a distance from the upper surface (54) of the liquid which it contains and which provides a signal with respect to position in the vertical direction of a zone of the upper surface of the liquid in the vessel. A device comprises the signals provided by the sensors so as to be able to provide data with respect to the vertical position of the vessels and, consequently, with respect to the points relative to one another or relative to a reference vertical position.