Fluid level sensor with combined capacitance and conductance

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United States of America Patent

PATENT NO 9789697
SERIAL NO

15220686

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A fluid sensor has a first electrode, a second electrode, a housing containing the first and second electrodes, such that the electrodes extend from the housing, exposed metal between the first and second electrodes, and a drive signal electrically connected to the second electrode, such that when fluid is present in the reservoir, either the first electrode senses the presence of the fluid, or the drive signal senses presence of the fluid. A fluid sensor has a first electrode, a second electrode, a housing containing the first and second electrodes, a drive signal electrically connected to the second electrode, and sensing circuitry to measure a current from the second electrode to indicate a fluid level.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
XEROX CORPORATIONSTAMFORD, CT13750

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Cited Art Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (1)
* 4947689 Capacitive liquid sensor 15 1989
 
SEIKO EPSON CORPORATION (1)
* 6209980 Ink cartridge for printer having electrodes 23 1997
 
SONY CORPORATION (1)
* 7059696 Remaining-liquid-amount display apparatus and remaining liquid-amount display method 7 2003
 
FUNAI ELECTRIC CO., LTD. (1)
* 6155664 Off-carrier inkjet print supply with memory 120 1998
 
XEROX CORPORATION (1)
* 5465619 Capacitive sensor 143 1994
 
CANON KABUSHIKI KAISHA (1)
* 5051759 Ink jet cartridge and ink tank 41 1990
* Cited By Examiner

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