| 摘要 |
PURPOSE:To enable accurately and continuously the measurement of water concentration even if an external force is applied and without interference in the operations of quenching or the like, by filling and sealing an oil to be tested in a cell provided to the external part of an oil tank. CONSTITUTION:A measuring cell 12 is provided separately from an oil tank 11 in which the oil to be tested is stored. This cell 12 is positioned at the upper part of the oil tank 11 and fixed to a supporter and a wall. A heating body 13 and a sensor 14 are provided in the cell. The heating body is heated to about 110 deg.C by a filament 13 provided in a holder 13a made of glass, metal or the like, and the oil adjacent to the heating body is heated to the b.p. of water or above so as to evaporate the water in the oil and to generate bubbles in the oil. The measurement of the bubbles of steam by the sensor 14 is carried out by detecting the generated sounds of bubbles or the variation of the transmittance or the scattering of light. For this purpose, a suitable measuring element is chosen. A suction mechanism 16 is provided between the measuring cell 12 and the oil tank 11. Thus, the water concentration of the oil in said cell 12 is measured in the sealed state. Even if the oil tank 11 is shaken by an external force, the accurate measurement can be carried out without propagation of vibration or the like to said cell 12. |
