| 摘要 |
PURPOSE:To enable easy and simple detection of moisture at the connection of a communication cable, by packing a transparent tube with a hygroscopic coloring agent while a breatching porous body is provided between the coloring agent and an opened tube end. CONSTITUTION:A lid 7 and a metal tube 8 are connected to a transparent tube 6 separately with an adhesive 9. A breathing porous body 10 is set on the side of the metal tube 8 and the transparent tube 6 is packed with a hygroscopic coloring agent 11. Then, when a moisture detector 12 is mounted to a connection case, the coloring agent 11 in the transparent tube 6 changes gradually from the side of the metal tube 8 if moisture enters at the opening of the metal tube of the detector 12. Therefore, this can indicate that there is abnormality in the moisture within the connection case thereby enabling easy and simple detection of moisture at the connection of a communication cable.
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