Optical transducer for detecting liquid level and electrical...

Details Optical transducer for detecting liquid level and electrical... Optical transducer for detecting liquid level and electrical...

2006-09-19

2006-09-19

Epps, Georgia (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S227110, C356S627000

Reexamination Certificate

active

07109512

ABSTRACT:
An optical transducer for determining the presence or absence of liquid or the like in a reservoir includes an electrical circuit with a pulse generator and processing electronics to filter out ambient light and compensate for temperature changes. A comparator circuit portion includes a pair of comparators that simultaneously output high and low signals when in the presence of liquid. One of the outputs can be selected to drive an indicator, pump, relay or the like.

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