|
Match
|
Document |
Document Title |
|
|
7610805 |
Combination capacitive proximity sensor and ultrasonic sensor for material level monitoring
A material level detection sensor ( 10 ) having a continuous ultrasonic sensor ( 12 ) and a capacitive proximity sensor ( 13 ). The capacitive proximity sensor detects the material only when the...
|
|
|
7603899 |
Apparatus and method for detecting liquid level with a probe
The present application discloses a method and apparatus for detecting liquid level with probe, and the method comprising steps of: (A) acquiring a capacitance value of the probe; (B) generating an...
|
|
|
7600424 |
Liquid condition sensing apparatus
Capacitive liquid condition sensing apparatus includes a pair of a 1 - 1 electrode and a 1 - 2 electrode arranged to form a first capacitance; a pair of a 2 - 1 electrode and a 2 - 2 ...
|
|
|
7571646 |
Electronic liquid level sensor
A pair of wires are coated in a conductive plastic sheath, and then imbedded in the inside of a plastic tube. The tube can be dropped down an oil well casing below the fluid level. A DC power...
|
|
|
7533567 |
Capacitance fuel volume measuring apparatus for fuel cell
A capacitance fuel volume measuring apparatus for a fuel cell is disclosed. The apparatus utilizes two electrode boards disposed in a fuel tank and an elastic element to perform calculation of the...
|
|
|
7533566 |
Fluid measuring device
A fluid measuring device for use in a fluid storage tank, comprising a logic operation unit, a capacitive sensor, and a capacitance sensing circuit; wherein the capacitance sensing circuit is...
|
|
|
7523006 |
Measurement sensor assembly and method for measuring the quality of a fluid
The aim of the invention is to provide a simple and reliable method of measuring the quality of a fluid ( 2 ), in particular an oil or fat. This is achieved by a dielectric measurement in...
|
|
|
7509856 |
Capacitance sensor for detecting the fill level of a medium in a container
A sensor according to the invention has an amplifier that is capacitively loaded vis-à-vis the ground by a container and by a medium contained therein and that has a capacitive feedback that is...
|
|
|
7490513 |
Method for sensing levels of conductive liquids
A liquid level sensor comprises a plurality of electrodes arranged in a defined relationship with respect to a container filling trajectory, a signal generator coupled to one or more of the...
|
|
|
7487793 |
Valve assembly with overfill protection device and capacitive liquid level gauge
A valve assembly, such as a tap for a liquefied gas cylinder, includes an overfill protection device and a liquid level gauge having an electrode assembly comprising a pair of lamellar electrodes...
|
|
|
7487677 |
Apparatus and methods for monitoring water consumption and filter usage
Apparatus and methods for employing electrical properties of water to indicate the level of filtered water in a filtered water container. The container is fitted with a hopper that holds unfiltered...
|
|
|
7475665 |
Capacitance-based fluid level sensor
A fluid level sensor comprises a parallel plate capacitor coupled to an integrated circuit located in the bottom of an oil pan or other receptacle in which fluid level is being sensed. The sensor...
|
|
|
7456752 |
Radio frequency identification sensor for fluid level
A sensor can detect the presence of fluid by the changing of the response characteristics of an RLC circuit. A window in the sensor is used to position a short caused by the fluid.
|
|
|
7451646 |
Device and method for resonant high-speed microscopic impedance probe
A resonant high-speed microscopic impedance probe useful for small scale impedance measurements and/or cell and particle counting.
|
|
|
7441455 |
Apparatus for measuring and indicating the level and/or volume of a liquid stored in a container
The present invention refers to an apparatus for measuring the level and/or volume of a liquid stored in a container. The apparatus comprises at least one pair of electrodes mounted in the interior...
|
|
|
7432725 |
Electrical field sensors for detecting fluid presence or level
The present disclosure provides several systems. In general, it provides E-field sensor systems that utilize at least one electrode 100 adapted for creating an E-field in an area 210 within a...
|
|
|
7427844 |
Switch assembly, electric machine having the switch assembly, and method of controlling the same
A pump assembly for pumping a liquid and a method of controlling the pump assembly. The pump assembly includes a motor coupled to a pump, and an electronic switch assembly electrically connected to...
|
|
|
7423436 |
Capacitive level measurement and detection device using high frequency voltage
A device for measurement and detection of the level of a medium in a container with a sensor element, with a reference element and an electrical circuit which contains at least one AC voltage...
|
|
|
7421896 |
Variable frequency charge pump in capacitive level sensor
A method of determining a fluid or material level. The method comprises the steps of: providing, at a first frequency, a current operatively capable of changing a capacitor; charging at least first...
|
|
|
7415366 |
Electronic field device with a sensor unit for capacitive level measurement in a container
A field device electronics with a sensor unit for capacitive fill level measurements in a container, wherein the field device electronics is connected over appropriate signal paths with the sensor...
|
|
|
7414414 |
Spatially distributed guarded impedance
A guarded sense impedance for use in a measurement instrument includes a sense impedance adapted to have a spatially distributed electrical potential and at least one guard structure adapted to...
|
|
|
7401513 |
Electronic method and system for detection of conducting or dielectric medium with dielectric constant higher than that of air
The method of detecting the presence of a conducting or dielectric environment with dielectric constant higher than that of air, of this invention, consists in counting the number of control...
|
|
|
7395559 |
Swimming pool water level controller
A water level controller for a pool has a water level sensor immersed in the pool. A processor detects if the sensor senses low water. A transmitter sends a radio frequency signal to a receiver if...
|
|
|
7378857 |
Methods and apparatuses for detecting the level of a liquid in a container
A method for detecting the level of a liquid in a container. The method includes applying a predetermined voltage to a level measuring electrode, disposed within the container, for a predetermined...
|
|
|
7373817 |
Solid state fluid level sensor
A sensor system for sensing liquid level in a bilge, for use in automatic bilge pump actuation. First and second field effect sensors are potted or sealed within a container or the bilge wall and...
|
|
|
7370528 |
System for detecting the level of liquid in a tank
The detecting system comprises a detecting circuit ( 1 ) made up of a transistor (T 1 ) in current generator configuration, connected in series with a resistance (Rs) and a capacitor ( 13 ) of...
|
|
|
7369055 |
Water softener monitoring system
A system for monitoring the level or amount of a material within a container is provided. The system includes a detection mechanism that can be a direct detection mechanism or any of a number of...
|
|
|
7367231 |
Flexible guided wave level meter probe
The invention is a level meter having a flexible probe. The flexible probe includes a flexible conductor and at least one flexible band shield member disposed in a substantially vertically parallel...
|
|
|
7360418 |
Method and apparatus for sensing liquid level using baseline characteristic
A liquid level sensing arrangement using a probe uses a baseline probe circuit characteristic, e.g., a circuit resistance or voltage, that is measured when the probe is out of contact with the...
|
|
|
7343798 |
Method, apparatus, hardware, and computer program product for a liquid level sensor
A method, apparatus, hardware, and computer program product for measuring a parameter related to the height of a liquid in a measurement vessel. An alternating voltage is applied to an input rod...
|
|
|
7340951 |
Distributed impedance sensor
An apparatus is disclosed for measuring one or more parameters of a variable physical structure, at least one of the parameters being fluid level, position, velocity or acceleration. The apparatus...
|
|
|
7337662 |
Electrostatic capacity type liquid state detecting sensor
An electrostatic capacity type liquid state detecting sensor includes an outer tubular electrode, and an inner electrode disposed within the outer tubular electrode and having an insulation layer...
|
|
|
7284427 |
Self-calibrating liquid level transmitter
The present disclosure generally relates to a capacitance sensing apparatus equipped with self-calibrating capacity and method of use thereof. The disclosure contemplates the determination using a...
|
|
|
7260987 |
Method for capacitive measurement of fill level
In a method for the capacitive fill level measurement of a fill substance in a container, electrical current is determined at two alternating voltage signals U 1 , U 2 of differing frequencies f 1...
|
|
|
7258005 |
Isolated capacitive fluid level sensor
A capacitive fluid level sensor is disclosed that operates without the use of a float, wherein coplanar sensing electrodes disposed onto a dielectric substrate and positioned proximate a dielectric...
|
|
|
7255004 |
Wireless fluid level measuring system
A level-sensing probe positioned in a tank is divided into sections with each section including (i) a fluid-level capacitive sensor disposed along the length thereof, (ii) an inductor electrically...
|
|
|
7232077 |
Fluid level sensing apparatus and method for a spray applicator
The present invention relates to a level sensing spray applicator. In one embodiment, the spray applicator includes a gun that receives a liquid and a supply vessel coupled to the gun. The vessel...
|
|
|
7222528 |
Fluid level sensor
A fluid sensor arrangement ( 20 ) includes a sleeve ( 32 ) that is adapted to be placed within a container ( 24 ). A plurality of conductors ( 46, 48 ) and a channel member ( 50 ) within the sleeve...
|
|
|
7222526 |
Liquid measurements using capacitive monitoring
An apparatus for determining the volume of liquid in a probe tip of an aspirating or dispensing probe, such as those used in a diagnostic analyzer, includes: two electrodes on opposite sides of the...
|
|
|
7219545 |
Sensor for levels of conductive liquids
A liquid level sensor comprises a plurality of electrodes arranged in a defined relationship with respect to a container filling trajectory, a signal generator coupled to one or more of the...
|
|
|
7170303 |
Fuel sensor
A sensor ( 20 ) includes a single capacitor ( 30 ) that operates in two different modes to obtain capacitance and conductance information when a mixture flows between the electrodes ( 32, 34 ) of...
|
|
|
7161361 |
Device and method for measuring capacitance and device for determining the level of a liquid using one such device
A device ( 5 ) measures capacity, and includes an electrode arrangement with a plurality of electrodes (E 1 , E 2 , . . . , En) which are adjacently and/or successively arranged on a carrier ( 6 )....
|
|
|
7159456 |
Level indicator for liquid hydrogen tank
A liquid hydrogen tank assembly that employs a level sensor inductively coupled through the tank walls so as to minimize one conductive heat path through the tank walls. The tank assembly includes...
|
|
|
7150190 |
Method and apparatus for capacitively determining the uppermost level of a liquid in a container
A liquid level sensor confirms actual physical contact between a probe and a liquid by verifying that any change in capacitance of the sensor is constant over a given time period and thereby is not...
|
|
|
7134330 |
Capacitive fill level meter
An apparatus for capacitive determination and/or monitoring of the fill level of a medium in a container, having at least one fill level probe, and having at least one electronic field device which...
|
|
|
7127943 |
Method and apparatus for detection of fluid level in a container
A fluid level sensor is disclosed having first and second vertically and horizontally nonoverlapping electrode plates for placing on a wall of a fluid container. Most preferably, the plates are...
|
|
|
7114391 |
Liquid level detection apparatus
There is provided a liquid level detection apparatus for detecting the level of a liquid, including a pair of first electrodes, a pair of second electrodes arranged at a different height to that of...
|
|
|
7107838 |
Apparatus and methods for monitoring water consumption and filter usage
Apparatus and methods for employing electrical properties of water to indicate the level of filtered water in a filtered water container. The container is fitted with a hopper that holds unfiltered...
|
|
|
7107837 |
Capacitance fluid volume measurement
A fluid volumetric pumping system has a fluid pump and capacitor plates disposed around a pump chamber of the fluid pump. The capacitance between the capacitor plates changes as the volume of fluid...
|
|
|
7100441 |
Method and apparatus for monitoring liquid levels within a vessel
An apparatus for monitoring the level of a liquid in a vessel comprises at least one metallic probe hermetically sealed within the vessel, the probe having a sealing end and at least a portion of...
|