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公开(公告)号：US3585622A
公开(公告)日：1971-06-15
申请号：US3585622D
申请日：1968-09-04
Applicant: GEN MOTORS CORP
Inventor： QUINN CLARK E , FELICE JOSEPH
IPC: G01F23/296 , G08B21/00
CPC classification number: G01F23/2967
Abstract: A vibratory liquid level detector includes an electromagnetic driving coil and an electromagnetic sensing coil arranged so that a test signal is induced in the sensing coil each time the driving coil is energized thereby indicating that the liquid level detector is functioning properly.
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