专利名称：Liquid level sensor发明人：Hewitt, John T.申请号：AU2008244653申请日：20080301
公开号：AU2008244653B2公开日：20121122
摘要：A liquid level sensor system (50) actuated by a column pressure includes asensor head unit and a hollow member (60) having a distal open end (62) adapted to bepositioned into a liquid reservoir (10). A connection tubing system (70) is adapted toprovide a closed connection between the hollow member and the sensor head unit whichfurther comprises: a bellows member (120) having an input stem portion (122) adaptedfor connection to the connection tubing system, an expandable body portion (124) and adistal bellows face surface (126), the bellows body adapted for expansion and
contraction in response to differential column pressure changes so that said bellows facesurface translates along a range of movement; a non-electrically-powered mechanism(112) responsive to movement of said bellows face surface to provide an indication of theliquid level.
申请人：John Hewitt
代理人：Phillips Ormonde Fitzpatrick
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