Patent ID: 6988406

Claim:
A system of liquid level detection comprising: a vessel; a sight glass in fluid communication with said vessel, said sight glass extending in a generally vertical orientation; a float positioned in said sight glass, said float movable in said sight glass; a proximity switch means affixed to an exterior of said sight glass, said proximity switch means for transmitting a signal relative to a sensing of the float proximity to said proximity switch means; a timer means cooperative with said proximity switch means, said timer means for measuring a period of time relative to said signal from said proximity switch means; an indicator means cooperative with said timer means for producing a humanly perceivable indication when said period of time is at a predetermined limit, said timer means for measuring said period of time when said proximity switch means senses said float, said indicator means for producing an alarm when said period of time exceeds said predetermined limit; and a fluid release fitting affixed to an upper end of said sight glass, said fluid release fitting allowing fluid to escape therethrough, said fluid release fitting comprising a cruciform member having a tubular bottom end affixed on to said upper end of said sight glass, said cruciform member having an upper tubular portion having a length suitable for securing said float therein, said cruciform member having a pair of opposed tubular fluid outlet extending transversely to said bottom end and to said upper tubular portion.