| 摘要 |
A stray field electrode (1) includes a base material (2) and a conductive filler material (3). The base material is preferably an insulating material, such a s a silicone elastomer film. The conductive filler material is preferably a metal, such a s silver particles dispersed in the silicone elastomer film. A set of stray field electrodes (16, 17, 18) may be used to determine the presence of water in a material (8), su ch as electrical generator insulation (14), by comparing a phase angle for the electric field (19, 20) between the electrodes with a predetermined phase angle for a dry material (8).
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