Patent ID: 6753785
Filing Date: 2004-06-22
Classification: G01F

Abstract:
An oil tank sight glass monitor comprising:a housing having an opening therein sized to receive the sight glass of an oil tank, the sight glass containing a moveable indicator of oil tank oil level; an emitter for emitting a beam of light, said emitter being mounted to said housing on one side of the opening and adapted to emit a beam of light directed across the opening and thereby through the sight glass; a detector for detecting the beam of light emitted by said emitter, said detector being mounted to said housing on the other side of the opening, diametrically opposed to and in optical alignment with said emitter, to optically detect the beam of light emitted by said emitter; and an alarm for producing an audible sound when the moveable indicator interrupts the beam of light and said detector fails to detect the beam; said housing, said emitter, said detector and said alarm forming a self-contained unit adapted to be positioned over the sight glass of the oil tank.