| 摘要 |
PURPOSE:To improve the accuracy in measurement of a level and to simplify the construction of an apparatus, by comparing the electric resistance values of first, second and third electric resistance wires stretched in liquid-phase and vapor-phase portions and in the direction of the height thereof inside a tank, with one another. CONSTITUTION:When a prescribed small current is made to flow through electric resistance wires 221, 222 and 223, a heat is radiated from each electric resistance wire. The vapor and liquid of a hydrogen isotope show different thermal conductivity as shown in the third table, and the electric resistance wires take electric resistance values in accordance with temperature. Accordingly, the electric resistance value of the electric resistance wire 223 is in accord with the level of a mixed liquid 2. Therefore, by inputting to an arithmetic unit 2 the electric resistance values of the electric resistance wires 221 in the mixed liquid 2 and of the electric resistance wire 222 in the vapor 3 respectively and by substituting said values for the electric resistance values on the mixed liquid 2 side and vapor 3 side of the electric resistance wire 223 for operational processing, it turns possible to calculate the level of the mixed liquid 2 and to take it out as an output signal 26. Thus, the accuracy in measurement can be improved, while the structure of the gage can be simplified. |
