| 摘要 |
Both ends of a sensing probe are sealed by an assembly including a fixing disk, a sensing probe, a sensing circuit, a floating collar and an external tube is provided. The fixing disk is provided with a threaded opening in which one end of the sensing probe is fixedly attached. The sensing probe is built-in with a sensing circuit. A floating collar is movably enveloped onto the sensing probe. The external tube is further attached to the fixing disk and the inner diameter of the external tube is larger than the outer diameter of the floating collar. The other end of the sensing probe is provided with an inner threaded portion. A locking cover is provided with a pair of openings and a post in a central portion. The post is provided with an external threaded portion in which the inner threaded portion of the sensing probe can be engaged. The post further includes a threaded recess in which a bolt having a small collar can be attached. The fixing disk further includes an annular extension at its bottom. A larger ring is disposed within the annular extension. The lower portion of the annular extension is provided with an inner threaded portion and the locking ring is provided with an external threaded portion such that the larger ring can be compressed when the later is locked up. By this arrangement, the sensing probe is completely sealed at both ends.
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