Matches 1 - 50 out of 225 1 2 3 4 5 >
Match Document Document Title
7254008 Integrated capacitive microfluidic sensors method and apparatus  
A microfluidic device and method for capacitive sensing. The device includes a fluid channel including an inlet at a first end and an outlet at a second end, a cavity region coupled to the fluid...
7088567 Tunable capacitors using fluid dielectrics  
Capacitors ( 10,20,40,50,70,80 ) having a fluid dielectric material that is transported or undergoes a phase change are disclosed. The dielectric medium change results in a change in the total...
6823730 Capacitive fill level measurement device  
A capacitive fill level measurement device with a fill level sensor having a plurality of sensor fields, electrical wires for electrically connecting the plurality of sensor fields to a multipole...
6799458 Oil level/condition sensor  
An oil level/condition sensor includes a first level sensing tube, a common tube, and a second level sensing tube. The tubes are concentric to each other around a central axis. Moreover, the tubes...
6776900 Level measurement for grease separators  
An interceptor for removing grease from an effluent stream containing grease and water may be queried remotely to check it status. An output signal indicative of the amount of grease is transmitted...
6542350 Reservoir volume sensors  
Reservoir volume in a drug delivery device is sensed by providing a capacitor, the capacitance of which varies with bellows position or, alternatively, with the amount of propellant liquid absorbed...
6490920 Compensated capacitive liquid level sensor  
A fringing-field capacitive liquid level sensor comprising an electrically insulating substrate, having a first and a second pattern of conductive capacitance plates plated on the substrate. Each...
6423213 Continuous level measurement for grease separator  
An automatic draw-off grease interceptor 10 includes a separation tank 12 defining a chamber 40. An inlet 24 delivers an effluent stream of grease and water into the chamber which separates...
6318172 Capacitive level detector with optimized electrode geometry  
The subject matter of the present invention is the optimization of a capacitive liquid level sensor which is suitable, in particular, for determining the location of a boundary layer 12 between...
6295869 Capacitive measurement probe for measuring the level of a liquid and tank equipped with such a probe  
Capacitive measurement probe (6) for measuring the level of a liquid in a tank (1), of the type comprising a body (7) for mounting the probe and a first plate (8) which is supported by the body and...
6293144 Method and device for monitoring the consumption of a product, for example a printing ink, using a low-pass filter  
In order to monitor the consumption of a normally electrically conductive product contained in a storage chamber of a reservoir made of electrically non-conductive material, the storage chamber is...
6278381 Fault condition protective device for aircraft fuel gauging system  
A fault protective device (48) for limiting the maximum current and voltage applicable to electronic components and wiring (26, 30) located in the fuel tank (10) of an aircraft. Particularly, a...
6250152 Sensor arrangement  
A sensor arrangement determines a condition and level of a liquid in a container. A first sensor has first electrodes forming a first measuring chamber communicating with the liquid and supplies a...
6247363 Method and device for determining a quantity of consumable product present in a reservoir and a document printing device implementing this method  
Determination of the quantity of consumable product present in a reservoir, for example the quantity of ink present in the reservoir of an inkjet printing device. According to the invention, the...
6178818 Capacitive filling level sensor  
5917264 Electrostatic capacitance type transducer and method for producing the same  
The present invention provides an electrostatic capacitance type transducer and a method for producing the same, with the ensured sufficient connecting strength and insulation between a movable...
5790422 Method and apparatus for determining the quantity of a liquid in a container independent of its spatial orientation  
A sensor apparatus is described that detects and indicates the quantity of cryogenic liquid in a Dewar container independent of the spatial orientation and physical motions acting on the Dewar...
5740594 Method for making a fluid pressure transducer  
A capacitive fluid pressure transducer is shown formed of a monolithic ceramic body (10) having a cavity located between a diaphragm portion (12) and a base portion (14). Opposed capacitor plates...
5726908 Liquid quantity sensor and method  
A sensor apparatus is described that detects and indicates the quantity of cryogenic liquid in a Dewar container, independent of the spatial orientation and the physical motions acting on the...
5668478 Windshield rain sensor  
The invention concerns rainwater sensors for windshields. In one embodiment, a first, inner, conductive film is applied to the inner surface of the windshield, and a second film, of same size and...
5546005 Guarded capacitance probe and related measurement circuit  
A continuous liquid level measuring system having a guarded capacitance probe and related drive circuit for providing accurate level measurements, even when measuring the level of ionic and highly...
5477727 Capacitive level sensor  
A main sensor electrode part 3 and a reference sensor electrode part 4 are deposited in patterns over the surface of a support member 10. A lead-out part 4b of the reference sensor electrode part 4...
5440455 Device for fastening a housing  
The innovation pertains to a device for fastening the housing of a data sensing element which encloses electronic circuits and connecting elements. Data sensing elements of this type are fastened...
5315872 Liquid level sensor for electrically conductive liquid  
Apparatus for measuring the volume of an electrically conductive liquid held in a confined area includes a tank constructed of electrically conductive, fiber-reinforced composite material having an...
RE34601 Capacitive liquid sensor  
A capacitive level gauge for placement in a container (12) determines the level of substance (14) in the container (12). The gauge (10) includes a measurement capacitor (C1) for measuring level and...
5307678 Material level probe having crimp seal  
A level measuring probe in which all potential leakage paths are closed by concentrically shrinking the outmost diametrical surface of the probe by some mechanical means such as a crimper or rotary...
5207098 Device to measure the level of material within a container  
A device is disclosed to measure the level of material within containers, in particular containers in which free-flowing materials having different dielectric constants, for example water and oil,...
5165084 System and method for measuring changes in sea level  
A system for determining changes in sea level based on the measurement of distance between capacitive elements. The system includes an electrically conductive sphere 17, 117 mounted on an...
5144835 Liquid level sensing device and methods of making and operating the same  
A liquid level sensing device for determining the level of a liquid in a liquid confining unit, methods of making and operating the device and a laundry machine using the device are provided, the...
5142909 Material level indicator  
A system for indicating level of material in a vessel comprising a probe which includes a plurality of electrically discrete probe elements of electrically conductive construction position within a...
5129415 System and method for automatically selecting one of a plurality of liquid supply receptacles as a source for a liquid dispensing apparatus  
A system and method for selecting one of a plurality of liquid supply receptacles as a source of supply for a liquid dispensing apparatus is disclosed. As liquid is withdrawn from the supply...
5122922 Variable capacitive sensor element  
In a preferred embodiment, a capacitive sensor element which includes a metal plate which is flat and smooth and hard-coated with a dielectric material, such as an oxide. The dielectric surface...
5103672 Flexible transmitter and fluid level gauging probe  
A fluid level gauging probe having a flexible transmitter wherein the flexible transmitter includes a first flexible electrically conductive conduit flexibly and substantially coaxially supported...
5103368 Capacitive fluid level sensor  
A device that determines liquid level or volume by means of charging a plurality of capacitors in sequence. Each capacitor is charged for a fixed time interval. The voltage level obtained is a...
5097703 Capacitive probe for use in a system for remotely measuring the level of fluids  
A capacitive probe for use in a system for remotely measuring the level of fluids. The probe is continuously charged and discharged. The discharge current from the probe is measured and converted...
5090128 Device for measuring or controlling change of level between several points  
A device measures or controls a change of a level or a variation in a change of a level between several points. The device includes closed vessels (2) placed respectively at each of the points. The...
5065139 Portable level sensing apparatus  
A portable level sensing device includes an audible alarm and a visual alarm (preferably LEDs) for signalling when a predetermined level has been sensed by a capacitance proximity switch. The...
5052223 Apparatus including a capacitive probe for measuring the level and/or the volume of a liquid  
The present invention relates to apparatus for measuring the level and/or the volume of liquid contained in the tank. The apparatus being of the type comprising a capacitive probe including at...
5050431 Liquid level sensing device and methods of making an operating the same  
A liquid level sensing device for determining the level of a liquid in a liquid confining unit, methods of making and operating the device and a laundry machine using the device are provided, the...
5048335 Capacitance-type material level indicator  
A system for indicating the level of material in a vessel as a function of material capacitance comprising a resonant circuit including a capacitance probe adapted to be disposed in a vessel so as...
5031068 Liquid level control system for refrigeration apparatus  
An improved capacitance bridge type liquid level control system for use in refrigeration applications is disclosed which provides improved apparatus for sealing the probe in its mounting and for...
5017909 Capacitive liquid level sensor  
A non-intrusive fluid level detector including a single point capacitive sensor mounted on the outside surface of a receptacle such that capacitive principles can be utilized to sense the level of...
5005409 Capacitive liquid sensor  
A capacitive level gauge for placement in a container (12) determines the level of substance (14) in the container (12). The gauge (10) includes a measurement capacitor (C1) for measuring level and...
5001596 Capacitive fluid level sensor  
A capacitor for a fluid level sensor that has first and second elongated expandable capacitor plates mounted in spaced relationship with respect to each other in a container to form a capacitor for...
4987776 Level indicator  
A storage installation which is capable of storing a variety of free-flowing materials, both conductive and non-conductive, includes a level sensing device which may be disposed either exteriorly...
4952914 Washer fluid monitor  
A washer fluid monitor comprising a pair of electrically conducting probes projecting downward into a washer fluid reservoir and incorporated into part of the positive feedback loop of a Wien...
4947689 Capacitive liquid sensor  
A capacitive level gauge for placement in a container (12) determines the level of substance (14) in the container (12). The gauge (10) includes a measurement capacitor (C1) for measuring level and...
4943889 Electrostatic capacitor type sensing device  
An electrostatic capacitance type detecting device which includes a first electrode placed in the proximity of an object to be measured, a second electrode placed in the proximity of the first...
4935727 Device for measuring the quantity of liquid contained in a tank  
A device for measuring the quantity of light in a tank is disclosed, including three level sensors housed within a tank in a predetermined relative position. Alternative processors are disclosed...
4924702 Liquid level sensor  
A capacitive sensor is constructed to eliminate electrical conduction through a liquid being measured. The electrical conduction in the liquid occurs between the plates of the reference and...
Matches 1 - 50 out of 225 1 2 3 4 5 >