| 摘要 |
A liquid sight monitor includes a translucent thermoplastic viewing tubular element having ends that are flared, after the tube is inserted through the central holes of flanges located at either end, to secure the viewing element in place. A float may be included in the viewing element of the same material and cup shaped to entrap air so that the float rises to the level of the fluid surface, even though it is otherwise heavier than the fluid. A flow-through restrictor disk prevents the float from falling out the bottom of the viewing element when there is an absence of fluid therein. The monitor may have a protective see-through shield connected between its top and bottom flanges, if desired.
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