| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a liquid level gauge that can detect a position and the like of an upper layer liquid with high accuracy with a simple structure without being unnecessarily corroded even when the upper layer liquid and a lower layer liquid are kept at a high temperature and highly corrosive to metal, in a storage tank or a reaction tank storing a two-layer structured liquid whose upper layer liquid is a low conductive liquid such as an electrolyte and whose lower layer liquid has a higher specific gravity than that of the upper layer liquid to be unnecessarily mixed with the upper layer liquid and is a liquid having higher conductivity than that of the upper layer liquid. <P>SOLUTION: A liquid level position and the like of the upper layer liquid 22 is detected according to a change in admittance output between a pair of electrodes 30, 40, 130, 140 in a state being supplied with AC current from an AC power source 50, especially a change in admittance output between probes 34, 44, 132b, 142b having a contact outer surface made of a material exhibiting corrosion resistance to the liquids. <P>COPYRIGHT: (C)2012,JPO&INPIT |
