LIQUID LEVEL METER Russian patent published in 2007 - IPC G01F23/22 G01F23/30 

FIELD: measuring technique.

SUBSTANCE: liquid level meter comprises cylindrical housing (2) whose inner space is in communication with the liquid through passages (5). Float (10) mounted in housing (2) is coated with a mirror layer. Emitter (11) and receiver (12) of radiation are connected with the space of cylindrical housing (2) through optical switch (13) made of a disk provided with ports. The surface of the disk is coated with a reflecting layer. The optical switch has corner reflector. Unit (15) is connected with the emitter (11) and receiver (12) of radiation and drive (14) for rotating the optical switch. The liquid level meter is additionally provided with step cylindrical nozzle (6) having base (7) for fastening to the neck of the reservoir, second corner reflector, and glass baffle (8) that separates hollow cylindrical nozzle (6) into stages. The small diameter stage receives tube (1) provided with housing (2) of the liquid level meter. The ring space between the tube and the housing is closed by baffle (3) with reflecting layer (4) on its inner side to prevent a contact with the liquid. The large diameter stage of cylindrical nozzle (6) receives optical switch (13) one port of which receives the first and second corner reflectors. Emitter (11) and receiver (12) of radiation and drive (14) of optical switch (13) are mounted on base (7) of the step cylindrical nozzle (6).

EFFECT: enhanced precision.

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