US Patent No: 4,674,329

Number of patents in Portfolio can not be more than 2000

Gauge for measuring the level or the conductance of a liquid present between two electrodes

Stats

ATTORNEY / AGENT: (SPONSORED)
 

Importance

Loading Importance Indicators... loading....

Abstract

A gauge for measuring the height of a liquid in a vessel comprises a measuring electrode (M) and a compensation electrode (R) in the vessel, and a circuit which measures the capacitance C.sub.M of the measuring electrode and the capacitance C.sub.R of the compensation electrode, each with respect to a wall of the vessel as counter-electrode, using the liquid in the vessel as dielectric. The quotient C.sub.M /C.sub.R varies with the height of the liquid in the vessel. The measuring electrode and the compensation electrode are parallel and of the same length, but differ in surface area and shape to such extent that such quotient varies as a linear function of the height of the liquid in the vessel.

Loading the Abstract Image... loading....

First Claim

Related Publications

Loading Related Publications... loading....

Patent Owner(s)

  • Assignment data not available. Check USPTO

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Mulder, Richard Capelle a/d Ijssel, NL 4 35

Cited Art

  • No Cited Art to Display

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
Drexelbrook Controls, Inc. (3)
4,788,488 Continuous condition sensing system 19 1986
4,950,998 Continuous condition sensing system 11 1988
5,045,797 Continuous condition sensing system determining liquid level by admittance measurement 10 1990
 
Lumenite Control Technology, Inc. (3)
7,284,427 Self-calibrating liquid level transmitter 5 2006
7,461,550 Self-calibrating liquid level transmitter 1 2007
7,665,358 Self-calibrating liquid level transmitter 3 2008
 
nth Solutions, LLC (2)
8,310,369 Detecting unintended flush toilet water flow 0 2010
8,166,996 Toilet bowl overflow prevention and water conservation system and method 0 2010
 
ALLIANCE LAUNDRY SYSTEMS LLC (1)
4,982,606 Fluid level sensor and controller 14 1989
 
AVANTIUM INTERNATIONAL B.V. (1)
7,916,294 System and method for solubility curve and metastable zone determination 0 2006
 
BECS TECHNOLOGY, INC. (1)
6,539,797 Auto-compensating capacitive level sensor 24 2001
 
CONTINENTAL AUTOMOTIVE GMBH (1)
6,622,557 Level sensor and method of registering a level in a container 6 2002
 
DELPHI TECHNOLOGIES, INC. (1)
6,923,056 Resonant network fluid level sensor assembly 3 2003
 
Drexelbrook Engineering Company (1)
5,049,878 Two-wire compensated level measuring instrument 20 1989
 
EASTMAN KODAK COMPANY (1)
6,670,817 Capacitive toner level detection 26 2001
 
nth Solutions (1)
7,757,708 Toilet bowl overflow prevention and water conservation system and method 0 2008
 
PULSTONE TECHNOLOGIES, LLC (1)
8,146,421 Method and apparatus for sensing levels of insoluble fluids 0 2009
 
Other [Check patent profile for assignment information] (1)
5,363,695 Leak detection system and method for detecting and measuring liquid leaks 1 1992