| 摘要 |
An insulated pipe system including means (1) for detecting the presence of fluid in the thermally insulating layer on a pipe comprises two electric conductors (3, 4) positioned in the thermally insulating layer. each conductor having an electrically insulating covering comprising a fluid absorbent layer and an outer barrier layer, the barrier layer preventing the thermally insulating layer reaching the absorbent layer, and means (M2) for detecting a change in resistance across the conductors due to the presence of fluid. |
