| 摘要 |
A method and equipment for determining (measuring) the level/height, h1 - hx, of one or more interfaces between two or more fluid phases of different density that are contained in a vessel, tank (1) or the like. The position (the level) of the different interfaces in a tank (1) is determined by measuring the pressure and thus indirectly determining the density of the fluid in the tank over the height of the tank by using a pressure measuring rod (2) equipped with pressure sensors (3) which is positioned in and extends over the height of the tank (1). For determining the interfaces, a mathematical model or algorithm is used which calculates how the density and hence the pressure vary over the height of the tank as a function of the fluid properties of the respective fluids in the tank, the interface, on the basis of the density being the same within each layer of the respective fluid, being defined as a respective point (level) at which the density changes from one layer to the next in the tank.
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