Fluid level optical detector with float having opaque and...

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system

Reexamination Certificate

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Details

C250S573000, C250S575000, C250S900000, C250S901000, C073S29000R, C073S29000R, C073S293000, C073S305000, C073S309000, C073S314000, C073S319000

Reexamination Certificate

active

11114332

ABSTRACT:
Systems and methods for fluid level detection are disclosed. In one embodiment, a sensor assembly includes at least one optical fiber adapted to at least one of transmit and receive an optical signal, and a moveable float member. The float member is adapted to move in a first direction as the fluid level increases and in a second direction as the fluid level decreases. The float member blocks the optical signal at a first value of the fluid level, and allows the optical signal to pass at a second value of the fluid level. The presence or absence of the optical signal is detected to determine the level of fluid.

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GB Combined Search and Examination Report for Application No. GB0607930.5, dated Aug. 31, 2006, 7pages.

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