| 摘要 |
<p>A device for measuring the level and/or the temperature of a liquid in a container, characterised by the following features: a linear resistor arrangement adapted to be immersed approximately vertically into the liquid (12), the resistor arrangement includes a series connection of three resistor portions, with each resistor portion including at least one temperature depending elongated resistor element, the resistor portions having a resistance per unit length which is uniform about their length, the resistor portions or resistor elements, respectively have a pre-determined length with the upper and lower resistor portion being short relative to the intermediate portion, the resistor arrangement is connected to a voltage source, a voltage meter measures the voltages of the resistor portions, a computer calculates the immersed length of the resistor arrangement or the temperature of the liquid, respectively from the dimensions of the resistor portions and the resistor elements and from the measured voltages by means of known resistor formulae. <IMAGE></p> |
