Japanese Patent JPH039406

B2

A level gauge for liquid helium suitable for use under a higher vapor pressure comprising a sensing element in the form of a ribbon wire made of superconductive alloys and a tube supporting the sensing element which tube is inserted into liquid helium upon measurement. Chemical composition of the superconductive alloys are represented by a formula, Zr100-x(Ru1-yRhy)x, in which x represents a content of Ru and/or Rh in atomic % and in a numerical value of 17.0