| 摘要 |
<p>A method of establishing electrodes in a liquid comprises; surrounding a region of a liquid with a lateral wall, such as a pipe 10, with a core of magnetically conductive material 12 which passes through a primary coil 14 energized by an electrical signal with regions on opposite sides of the magnetically conductive core being connected by a passage 22 containing the liquid. The electrical resistance offered by the passage may be altered by adjusting the cross-sectional area of the liquid within the passage. Apparatus for carrying out the method is also provided.</p> |
