| 摘要 |
A liquid petroleum gas (LPG) gauge sensor unit fits between the units of an existing magnetically-coupled LPG gauge and includes a magnetic field sensing switch, a mechanism to variably position the switch and an intermediate magnet. The intermediate magnet is positioned upon an axle-like mechanism upon which it is free to rotate and magnetically couples to the existing gauge base magnet which is, in turn, connected to a float that measures the liquid level. The existing indicator magnet in the gauge assembly magnetically couples with the intermediate magnet so that the gauge unit visually indicates the level of LPG within the LPG tank, despite the increased distance between the base and indicator magnets caused by the sensor unit. The magnetic field sensing switch is used to sense the position of the base or intermediate magnet and thereby sense the liquid level.
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