| 摘要 |
The invention relates to a superconducting level measuring apparatus for liquid hydrogen in liquid hydrogen vessels, in particular vehicular tanks, a superconductor ( 1 ) based on magnesium diboride MgB<SUB>2 </SUB>being arranged vertically or inclinedly to the vertical in a liquid hydrogen vessel ( 5 ), and a controllable heat source ( 2 ) being arranged on the upper region of the superconductor ( 1 ), the superconductor ( 1 ) being electrically contacted with a controllable current source ( 3 ) as well as a voltage measuring apparatus ( 4 ) and the level being measured by measuring a voltage. The MgB<SUB>2 </SUB>material is preferably employed as a filament wire. Continuous level measurements of high spatial and temporal resolution can be implemented in uncomplicated fashion. The level measuring apparatus and the method are also suitable for level measurement of liquid neon.
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