| 摘要 |
A vented float 100 for a liquid level gauge with a hollow body has a top end, a bottom end and an internal cavity 103. A vent passage 114 is provided having an upper end open to the exterior of the body and a lower end opening into the internal cavity whereby liquid collecting in the bottom of the cavity can be forced up through the passage by a pressure difference between the interior and exterior. The body may comprise a tube and top 101 and bottom 109 end caps which define the internal cavity. The vent passage may comprise a bore in the top end cap joined to a vent tube which extends along the vent passage. The vent passage may comprise a capillary tube. The float may comprise a magnet 105a,b held centrally within the tube of the body by a holder 106a,b. |
