| 摘要 |
A liquid level indicator ( 1 ) is provided for sealing engagement with an opening of a receptacle. A float ( 8 ) is used which rests at the liquid level and which is connected to a float rod ( 7 ), which in turn is pivotally connected to fixed ( 5 ) and slidable rod ( 6 ). Upon changing liquid levels, the float ( 8 ) and, accordingly, the slidable rod ( 6 ) move and the position of the slidable rod with respect to a marked transparent cup ( 11 ) disposed outside of the receptacle, indicates the liquid level. The transparent cup ( 11 ) covers the portion of the indicator outside of the receptacle and serves to provide a fluid- and air-tight seal between the interior and exterior of the receptacle when the indicator is in place. In one embodiment the liquid level indicator may be used with oil tanks. A transparent cup ( 11 ) for use with existing devices is also taught.
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