| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a device and a method for measuring a liquid level of an cryogenic refrigerant in a pipe, capable of more accurately measuring the shape of the surface of the liquid even if the height of the liquid surface changes, when the liquid level of the cryogenic refrigerant differs in the pipe. Ž<P>SOLUTION: The liquid-level measuring device for the cryogenic refrigerant, which measures the liquid level of the cryogenic refrigerant by holding a superconducting wire 3 in the pipe 1 horizontally, causing current to flow in the superconducting wire 3 to measure the voltage between its both ends, and finding out the length of the part not being dipped in the cryogenic refrigerant of the superconducting wire 3 inside the pipe 1; has a moving means capable of vertically moving a sensor unit to which the superconducting wire 3 is fixed. The moving means capable of moving the sensor unit vertically is a moving mechanism through the use of a float fixed to the sensor unit, for example. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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