| 摘要 |
A transponder conduit end cap includes a transponder housing having two flat, generally parallel walls defining a cavity, a transponder located in the housing, and a fitting which attaches the transponder housing to the end of a conduit, to thereby seal the conduit. The transponder axis is maintained in a predetermined orientation (e.g., vertical), such as by partially filling the cavity with a liquid, and using a buoyant envelope to contain the transponder. Alternatively, the vertical orientation may be maintained by pivotally supporting the transponder from a trunnion attached to an interior of the housing. The transponder can be supported by the trunnion using a loop attached to an end of the transponder, the loop being placed about an annular chamfer of the trunnion to allow spherical articulation. The transponder can be active or passive.
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