Abstract: 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.

Abstract: 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.