Entries |
Document | Title | Date |
20080271528 | SENSING DEVICE - The present invention discloses a sensing device, wherein a hemispherical container containing a liquid dielectric, and the hemispherical container has more than two pairs of electrodes, and the liquid dielectric can trigger the conduction states of the electrodes. A corrosion-resistant material envelops the container. A precision valve is arranged in the container and used to adjust the level of the liquid dielectric and the sensitivity of the sensing device. A buffer necking part is also arranged in the container and used to prevent from non-expected vibration-induced contact between the electrodes and the liquid dielectric. A leakage-proof detection device envelops the hemispherical container, the liquid dielectric, the precision valve, and the buffer necking part and functions to prevent from the leakage of the liquid dielectric. Thus, the present invention can provide an adjustable multi-directional tilt-sensing device for level control. | 11-06-2008 |
20080295592 | Liquid level detection device - A liquid level detection device includes a sensor provided in a container which stores a liquid therein and having a variable resistance which changes a resistance value in association with a change of liquid level to output a voltage signal according to the resistance value of the variable resistance when a voltage is applied thereto, and a power supply circuit applying the voltage to the sensor intermittently on a predetermined cycle. A conducting time during which the power supply circuit applies the voltage to the sensor is equal to or less than 40 ms per cycle. | 12-04-2008 |
20090019931 | DETECTION DEVICE MAKING IT POSSIBLE TO MEASURE THE QUANTITY OF HOT WATER REMAINING IN A STORAGE RESERVOIR - The detection device for measuring the quantity of hot water remaining inside a storage reservoir and more particularly inside a tank ( | 01-22-2009 |
20090090179 | Sensor with polymer substrate for use in corrosive liquids - A fuel system sensor has an acetal substrate that does not corrode in fuel, and the substrate bears conductors that are connected to terminals partially embedded in the substrate. Various methods for forming the conductor paths on the acetal are disclosed. The terminals can be formed with thermal relief structure. | 04-09-2009 |
20090126484 | DEVICE AND METHOD FOR DETECTING THE FILLING LEVEL OF A CONTAINER, AND DEVICE FOR FILLING A CONTAINER - A device and method for detecting the filling level of a container, such as a bottle, using a measuring probe that can be introduced into the container and comprises a resistance section which is electrically contacted at two points. The resistance section can be brought into contact with the product with which the container is to be filled, at different heights, the measuring probe comprising an electrically contacted reference potential electrode. | 05-21-2009 |
20090158842 | HTA Fluid Level and Fluid Type Measurement - Apparatus for measuring an amount of ablation fluid circulating in a system for ablating tissue comprises a plurality of electrical contacts located within an ablation fluid receiving chamber of the system, the contacts being located at various heights and a data processing arrangement coupled to the contacts to receive data corresponding to electrical conductance between pairs of the contacts, the data processing arrangement determining a height of fluid in the chamber based on the measured conductance levels and determining based on the determined height, whether an amount of fluid circulating through the system is within a desired range. | 06-25-2009 |
20100005880 | Apparatus for determining and/or monitoring a process variable - An apparatus for determining and/or monitoring a process variable of a medium in a container. including: a probe unit, which has a sensor electrode and a guard electrode; and an electronics unit, which supplies the sensor electrode with an activating signal and which supplies the guard electrode with a guard signal; An amplifying unit; and a limiting element arranged in series between the guard electrode and the output of the amplifying unit. The amplifying unit supplies via the limiting element the guard electrode with the guard signal; and the amplifying unit supplies via the limiting element the sensor electrode with the activating signal. The evaluating unit is provided, which determines and/or monitors the process variable based on an electrical current signal measurable at the sensor electrode, and the activating signal and/or the guard signal. | 01-14-2010 |
20100077854 | Circuit Design to Prevent False Level Sense Readings - A circuit for conveying signals between one or more ink level sensors and a circuit includes a substrate having a circuit end, a sensor end, and an elongated body extending therebetween. The sensor end includes a bottom layer in which the first signal trace is routed and a top layer in which the second and third signal traces are routed. The sensor end includes a first, a second, and a third connector each extending through the top and the bottom layers that are electrically connected to a first signal trace, a second signal trace, and a third signal trace, respectively, in the substrate. The first connector, the second connector, and the third connector are configured for electrical connection to a first probe, a second probe, and a third probe, respectively, of the level sensor. A first ground trace is positioned in the sensor end that includes a first continuous guard ring in the top layer completely surrounding and spaced from the first connector, and a first segmented guard ring in the bottom layer including a plurality of segments that are each electrically connected to the first continuous guard ring and being spaced from the other segments in the first segmented guard ring. The first signal trace is routed in the bottom layer to the first connector via a space between the segments of the first segmented guard ring. | 04-01-2010 |
20100077855 | INK LEVEL SENSOR - A probe assembly for use with an ink reservoir level sensing apparatus comprises an insulating support frame formed of an electrically insulating material. The insulating support frame includes a lower portion to be positioned in a lower portion of an ink reservoir and an upper portion configured to be positioned in an upper portion of the ink reservoir. The insulating support frame has a lower probe and an upper probe each partially encapsulated by the electrically insulating material of the insulating support frame such that the lower and upper probes are physically and electrically isolated from each other, and positioned with respect to each other such that at least a portion of the lower probe is positioned in the lower portion of the frame, and the upper probe is positioned above the lower probe in the support frame extending to the upper portion of the frame. An outer probe is attached to the insulating support frame using attachment features that are formed integrally with the insulating support frame. The outer probe is positioned on the insulating support frame extending from the lower portion of the frame to the upper portion of the insulating support frame. | 04-01-2010 |
20100132454 | APPARATUS FOR DETERMINING AND/OR MONITORING AT LEAST ONE PROCESS VARIABLE - An apparatus for determining and/or monitoring at least one process variable. The apparatus includes at least one, first electronics unit, at least one, second electronics unit, and at least one transferring unit. The transferring unit is arranged between the first electronics unit and the second electronics unit, and the transferring unit is embodied in such a manner, that it transmits electrical energy and data between the first electronics unit and the second electronics unit. | 06-03-2010 |
20100175471 | ROBUST OIL LEVEL SENSOR - An oil level sensor comprises a body having a probe extending away from a nominal body portion. The probe receives a resistance thermal device and extends for a height away from the nominal surface. The probe has an outer dimension. The ratio of the outer dimension to the height is between 0.1 and 0.2. The RTD is connected to lead wires through splices, the lead wires leaving the nominal housing. A fastener tab extends away from the nominal body, and generally perpendicularly to the probe. The lead wires are anchored within a chamber, which is filled with a potting material. | 07-15-2010 |
20110048126 | ARRANGEMENT FOR FILL-LEVEL MEASUREMENT - The invention relates to an arrangement for fill-level measurement of an electrically conductive liquid in a container, in particular for fill-level measurement in a reducing agent tank of an exhaust gas aftertreatment system, whereby a large number of electrodes ( | 03-03-2011 |
20110061458 | Methods Of Using An Electrochemical Biosensor - According to one embodiment of the present invention, an electrochemical sensor ( | 03-17-2011 |
20110100120 | FILL LEVEL SWITCH AND SENSOR ELEMENT FOR A FILL LEVEL SWITCH - A fill level switch ( | 05-05-2011 |
20110138906 | PROGRAMMABLE ELECTRONIC CIRCUIT TO PROCESS A HALL-EFFECT SIGNAL FOR USE IN A LIQUID LEVEL SENSOR - A system and method for measuring liquid levels is provided. The system includes a sensing device disposed within an enclosure comprising a liquid therein, the sensing device generates a raw signal indicative of a surface level of the liquid in the enclosure; and an programmable device circuit in signal communication with the sensing device, the programmable device circuit samples and processes the raw signal producing a variation in voltage at an output of the programmable device circuit, the variation in voltage emulates a variable resistor at the output of the programmable device circuit. | 06-16-2011 |
20110290014 | LIQUID LEVEL DETECTION APPARATUS - A liquid level detection apparatus detecting a liquid level of a coolant stored in a coolant tank for an internal combustion engine, includes first and second electrodes immersed in the coolant and electrically connected to each other via the coolant when the liquid level of the coolant is higher than a predetermined position, a transmitter generating a sine wave including a specific frequency and equal amplitudes at positive and negative frequencies, the specific frequency being below a predetermined frequency, the transmitter sending the sine wave to one of the first and second electrodes, and a receiver including a band-pass filter receiving the sine wave outputted from the transmitter, via the other of the first and second electrodes to allow passage of the sine wave having the specific frequency, and a determination portion determining the liquid level of the coolant in accordance with the sine wave passed through the band-pass filter. | 12-01-2011 |
20110303004 | METHOD OF CORRECTING FOR CONTAMINANT DISTORTION OF ELECTRICAL WASTEWATER LEVEL SENSORS - A method, useful for wastewater liquid level indication rods in wastewater treatment facilities, of correcting the readings from the rod's electrode based liquid level sensors for inaccuracies and distortions caused by fat, oil, and grease (FOG) contaminant build up. The method may also detect how the electrical signals change as the liquid levels progress ever higher above the level of the measuring electrode of interest. These methods allow for the creation of improved wastewater liquid monitoring systems and management systems that can warn when cleaning is needed, help prevent pump burnout, overflow, and address other common wastewater management problems. | 12-15-2011 |
20120006111 | 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 are aligned in a vertical array and each comprise a substantially planar pattern of “electrodes” or conductive traces disposed on a printed circuit board (PCB) along with integrated circuits used to create a loop or arc-shaped electric field. As bilge liquid rises to the proximity or level of the field effect sensors, a change in the arc-shaped electric field is sensed and, in response, a bilge pump is automatically actuated to pump liquid out of the bilge. Optionally, the pump control can be programmed by use of a microprocessor to permit control of on-off timing and prevent undesirable effects of “sloshing.” | 01-12-2012 |
20120067120 | METHOD FOR MEASURING THE LEVEL OF LIQUID CRYOGEN IN A CRYOGEN VESSEL - In a method for measuring the level of liquid cryogen in a cryogen vessel, a current pulse is applied to a cryogen level probe includes an ignition current pulse part of sufficient magnitude to ensure that a resistive front propagates down the probe to below the liquid cryogen surface; a recovery current pulse part allowing that part of the superconducting wire below the surface of the liquid cryogen to return to a superconducting state; and a measurement current pulse part of sufficient magnitude and duration to allow an accurate measurement of the superconducting wire's resistance to be measured. | 03-22-2012 |
20120073366 | LEVEL SENSOR AND ASSOCIATED CONTROL CIRCUIT, IN PARTICULAR FOR A FILTER FOR VEHICLES - A sensing device includes at least one electrode pair ( | 03-29-2012 |
20120174667 | FLUID LEVEL MEASUREMENT APPARATUS - A fluid level measurement apparatus supports multiple fluid level sensors of different types, each of which detects a level of fluid and produces an output indicative of the detected fluid level in a different way. The fluid level measurement apparatus is connected to any one of the supported fluid level sensors to measure the fluid level. The fluid level measurement apparatus includes a calculation circuit, multiple output circuits, a determination circuit, and a selection circuit. The calculation circuit calculates the fluid level from a detection voltage. Each output circuit generates the detection voltage based on the output of a corresponding fluid level sensor. The determination circuit determines the connected fluid level sensor. The selection circuit selects the output circuit corresponding to the determined fluid level sensor and allows the calculation circuit to obtain the detection voltage generated by the selected output circuit. | 07-12-2012 |
20120227484 | NON-INVASIVE RADIO FREQUENCY LIQUID LEVEL AND VOLUME DETECTION SYSTEM USING PHASE SHIFT - A medical fluid system includes a medical fluid pump; a container holding a fluid to be pumped by the medical fluid pump, the fluid at a first time having a first conductivity, the fluid at a second time having a second conductivity; and a radio frequency level sensor positioned in operable relation with the container, the radio frequency operation of the level sensor configured so as to be (i) indicative of a level of the fluid in the container and (ii) at least substantially independent of whether the fluid has the first conductivity or the second conductivity. The medical fluid system can determine the level of medical fluid by measuring the resistance, impedance or phase shift seen by the sensor. | 09-13-2012 |
20130061670 | LIQUID SENSOR USING TEMPERATURE COMPENSATION - A liquid sensor system can detect whether liquid is present at a location within a tank or other container, such as an aircraft fuel tank. The system can include a sensor that has a heated negative temperature coefficient (NTC) element and a temperature compensator element. The sensor may be located within the tank. The elements can be polarized by voltages from separate voltage sources. The voltages can be compared to detect a presence or level of liquid within the tank. Only two wires may be needed to connect the sensor with components outside the tank. The system may be able to detect liquid using less than twenty five milliamps and a sensor temperature that is less than two hundred degrees Celsius. | 03-14-2013 |
20130220013 | SENSORS - A system and method of sensing in a system, the system comprising: a plurality of sensors ( | 08-29-2013 |
20130233072 | Temperature compensated hydrostatic liquid level sensor - An outer passive reference resistor loop is printed along the length of an elongated substrate along with an inner active liquid level sensing resistor loop, whereby the reference resistor loop is exposed to exactly the same varying temperature conditions as the active level sensing resistor loop (e.g. in half air/half water), thereby providing superior temperature compensation. An upper plastic substrate carries a elongated conductive strip that is positioned over the first and second legs of the inner resistor loop but not over the legs of the outer resistor loop and wherein the first and second insulated substrates are coupled together providing separation of the substrates in the absence of hydrostatic pressure, and for causing conductive bridging contact by the elongated strip of an electrically conductive material contacting the first and second legs of the inner resistive elongated loop in the presence of hydrostatic pressure. Printed inks produce the resistive loops. | 09-12-2013 |
20130269431 | LIQUID LEVEL DETECTING DEVICE - A liquid level detecting device includes a first detecting part that has a first electrode extending in a vertical direction in the tank and opposing to a ground electrode and detects a first electrostatic capacity between the first electrode and the ground electrode, a second detecting part that has a second electrode extending in the vertical direction in the tank and opposing to the ground electrode and detects a second electrostatic capacity between the second electrode and the ground electrode, and a difference calculating part that calculates a difference between the first electrostatic capacity detected by the first detecting part and the second electrostatic capacity detected by the second detecting part as a capacity difference and determines whether the liquid level in the tank is above a warning threshold. | 10-17-2013 |
20140090465 | Cuvette Module Having an Electrically Conductive Cuvette Carrier - A cuvette module comprises a cuvette carrier and a cuvette held by the cuvette carrier. An intermediate chamber is formed in the cuvette carrier. The cuvette carrier comprises an electrically conductive plastic material. The cuvette has a different material than the cuvette carrier and the wettability of the cuvette carrier is greater than the wettability of the cuvette. A method transfers a predetermined amount of liquid from a transport container to a cuvette, employs a cuvette module. The method makes it easier to check whether the intermediate chamber still contains a sufficient amount of liquid. | 04-03-2014 |
20140174173 | ANALOG CONDUCTIVE LIQUID LEVEL SENSOR - An analog conductive liquid level sensor for conductive liquids having three probes. The invention provides an analog output in proportion to the level or volume of the fluid. Triangular shaped probes are closer together at the top than at the bottom with the respective triangular apexes at the bottom resulting in a nearly linear output voltage in accordance with the fluid level. The shape of the probes can be changed to proportion the voltage output to the fluid volume of an irregular shaped container. A driver probe near the bottom of the container provides a constant area exposed to the conductive liquid. This probe provides compensation for the variations in fluid conductivity which could introduce errors in the level indication in the container as found with two probe systems. | 06-26-2014 |
20150143899 | RESIDUAL QUANTITY SENSOR - A residual quantity sensor includes a conductive member having a first insulated wire and a second insulated wire. The first insulated wire and the second insulated wire have bared portions at an end thereof to provide a first electrode and a second electrode. The first electrode and the second electrode provide an electrode section of the conductive member. The first insulated wire and the second insulated wire are twisted to each other at a part thereof to provide a twisted section of the conductive member. The conductive member is to be installed to a tank such that the electrode section is disposed in a tank body, and the twisted section is extended to an outside of the tank through a vent hole of a tank cap attached to the tank body. | 05-28-2015 |
20150308877 | A LEVEL MEASUREMENT SYSTEM FOR CONDUCTIVE LIQUIDS - A level measurement system for conductive liquids including a liquid container ( | 10-29-2015 |
20150322771 | WELL WATER DEPTH MONITOR - Methods, apparatuses, and computer readable medium including computer program products, are provided for determining the depth of water in a well. A method may include coupling a signal onto a cable connected to a submersible well pump. The method may further include monitoring the cable to determine a first time corresponding to a first reflection of the signal caused by the cable entering a water column between a water surface and the submersible pump. The method may further include monitoring the cable to determine a second time corresponding to a second reflection of the signal caused by an impedance mismatch between the cable surrounded by water and a motor in the submersible well pump. The method may further include determining a water height between the submersible pump and the water surface from the first time and the second time. | 11-12-2015 |
20160003662 | SYSTEMS AND METHODS FOR REMOTELY MEASURING A LIQUID LEVEL USING TIME-DOMAIN REFLECTOMETRY (TDR) - A remote pulse TDR liquid level measurement system and method may include inserting a probe into a body of water. The probe has a probe/air interface, and the body of water includes an air/water interface. A narrow pulse is remotely transmitted to the probe via a coaxial cable. A first impedance mismatch is received from the probe/air interface in a form of a positive reflected pulse, and a second impedance mismatch is received from the air/water interface in a form of a negative reflected pulse. A time between the positive reflected pulse and the negative reflected pulse is calculated, and the time is converted to a distance, the distance being indicative of the water level. | 01-07-2016 |
20160076928 | LIQUID SENSOR USING TEMPERATURE COMPENSATION - A liquid sensor system can detect whether liquid is present at a location within a tank or other container, such as an aircraft fuel tank. The system can include a sensor that has a heated negative temperature coefficient (NTC) element and a temperature compensator element. The sensor may be located within the tank. The elements can be polarized by voltages from separate voltage sources. The voltages can be compared to detect a presence or level of liquid within the tank. Only two wires may be needed to connect the sensor with components outside the tank. The system may be able to detect liquid using less than twenty five milliamps and a sensor temperature that is less than two hundred degrees Celsius. | 03-17-2016 |
20080210004 | LEVEL METER - A level meter employs the radar concept for measuring the fill level of a medium in a container and incorporates an electric conductor system for conducting an electromagnetic signal into the container and returning reflected components of the electromagnetic signal from the container. Here, the electric conductor assembly is integrated into a wall of the container. The result is a universally employable electric conductor assembly so configured as to be unobstructed by built-in structures in the container such as agitators, intake pipe fittings or discharge connectors. | 09-04-2008 |
20080223128 | Capacitive Gauge Comprising Interdigital Electrodes On An Insulating Substrate - Capacitive gauge comprising interdigital electrodes on an insulating substrate having the form of a hollow cylinder having an internal surface and an external surface, the interdigital electrodes being disposed on the internal surface of this cylinder. | 09-18-2008 |
20080229819 | Capacitive Sensor and Method and Apparatus for Controlling a Pump Using Same - A variable capacitor for sensing the level of a liquid. The capacitor provides a readable capacitance that varies with respect to the level of the liquid. A pump control system implementing the capacitive sensor to control the level of a liquid by activating and deactivating the pump depending on the level of the liquid. Methods relating to varying capacitance of a capacitive sensor and controlling a pump based on the level of a liquid. A pump controller for controlling the level of a liquid in a reservoir includes a controller and a capacitor. The capacitor is adapted to provide an activation signal to the controller when the liquid in the reservoir reaches a first predetermined level relative thereto. Additionally, the capacitor is adapted to provide a trigger signal to the controller when the liquid in the reservoir reaches a second predetermined level relative thereto. Based on the trigger signal, the controller determines when to deactivate the pump. | 09-25-2008 |
20080229820 | Capacitive Gauge - Capacitive gauge comprising a measurement capacitor, a reference capacitor and a standard capacitor, supplied by and connected to an electronic interpretation circuit comprising switches for charging and discharging the capacitors at a certain frequency; an integrator to which the charges of the measurement or reference capacitor can be transmitted and accumulated before being discharged into the standard capacitor; a comparator for comparing an output value of the integrator with a threshold value; a counter; and a processor or computation unit for calculating the level of liquid in a tank according to the equation: | 09-25-2008 |
20080250857 | 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 are aligned in a vertical array and each comprise a substantially planar pattern of “electrodes” or conductive traces disposed on a printed circuit board (PCB) along with integrated circuits used to create a loop or arc-shaped electric field. As bilge liquid rises to the proximity or level of the field effect sensors, a change in the arc-shaped electric field is sensed and, in response, a bilge pump is automatically actuated to pump liquid out of the bilge. Optionally, the pump control can be programmed by use of a microprocessor to permit control of on-off timing and prevent undesirable effects of “sloshing.” | 10-16-2008 |
20080276704 | Capacitive Gauge for Fuel Tank - Capacitive gauge for fuel tank comprising a measurement capacitor, a reference capacitor and at least one standard capacitive device, fed by and connected to an electronic interpretation circuit comprising switches for charging and discharging the capacitors and the capacitive device at a certain frequency; an integrator to which the charges of the measurement or reference capacitor can be transmitted and accumulated before being discharged into the standard capacitive device; a comparator for comparing an output value of the integrator with a threshold value; a counter; and a processor or computation unit for calculating the level of liquid in a fuel tank according to the equation: | 11-13-2008 |
20080282795 | CAPACITIVE LIQUID LEVEL DETECTOR FOR DIRECT METHANOL FUEL CELL SYSTEMS - A capacitive liquid level detector for detecting a liquid level of a liquid in a receptacle, the liquid being conductive, the detector comprising: a capacitor with a first plate having a fixed size and being insulated from the liquid, and a second plate being formed by the liquid itself, its size being variable depending on the liquid level inside said receptacle, wherein a thin film dielectric layer is formed on the surface of the first plate and located between the first plate and the second plate, the first plate with the thin film dielectric layer formed on its surface is arranged such that it covers an open part of the outer wall of the receptacle, the first plate with the thin film dielectric layer formed on its surface is attached to the receptacle by sealing means in order to seal the receptacle against liquid leakage. | 11-20-2008 |
20080307881 | Device for Determining and/or Monitoring the Fill-Level Process Variable of a Substance in a Container - The invention relates to an apparatus for determining and/or monitoring the process-variable fill-level of a fill substance in a container. The apparatus of the invention is to satisfy high demands with respect to chemical resistance and/or cleanability, while permitting individual parts to be replaced. In accordance with the invention, a housing part ( | 12-18-2008 |
20080307882 | Capacitive Level Probe - The invention concerns a capacitive level probe, in particular for measuring the filling height of a liquid medium, comprising a connection portion ( | 12-18-2008 |
20090000374 | METHOD AND APPARATUS TO REJECT ELECTRICAL INTERFERENCE IN A CAPACITIVE LIQUID LEVEL SENSOR SYSTEM - Methods, systems, and computer program products for measuring a capacitance between a probe and a liquid, pausing movement of the probe based on a rate of change of the capacitance, further measuring the capacitance while the probe is paused, and, based on the further measurements, performing one or more of: resuming movement of the probe, determining a position of the probe, aspirating liquid into the probe, and dispensing from the probe. Resuming movement of the probe can include returning iteratively to measuring a capacitance, and the further measuring can be performed for a time interval that can vary based on the further measured capacitance(s), a probe movement characteristic, and/or a sampling rate. | 01-01-2009 |
20090019930 | Method and apparatus for measuring medium layers and interfaces between them using a multi-sensor probe - For measuring the filling level of a measuring medium, including detecting multiple medium layers and interfaces between them, a multi-sensor probe can be dipped into the measuring medium and longitudinally segmented into a plurality of segments, each segment comprising a sensor for measuring a predetermined physical parameter of the surrounding medium. To provide an accurate, reliable and robust measurement of multiple medium layers a measurement model is defined for modeling signals of the sensors as a function of positions of a number of interfaces between the medium layers and the physical parameters of the medium layers. Prior distributions of the number of the interfaces, the positions of the interfaces and the physical parameters of the medium layers are defined. Based on the measurement model and the prior distributions a joint posterior distribution of the number of the interfaces and the positions of the interfaces is determined. The joint posterior distribution of the number of the interfaces and the positions of the interfaces is evaluated based on Markov Chain Monte Carlo methods. | 01-22-2009 |
20090031798 | FLUID LEVEL MEASURING DEVICE FOR A BEVERAGE DISPENSER - A level sensing apparatus and method of use for use with a beverage server to indirectly sense the level of beverage retained in the server. The server having a body for receiving and retaining beverage with an opening in the body for receiving the level sensing apparatus and beverage there through. The level sensing apparatus includes at least one capacitive sensing probe assembly retained in a housing to separate the probe assembly from contact with beverage. The housing containing the capacitive sensing probe assembly being disposable into the opening in the body of the server. The capacitive sensing probe indirectly sensing at least one level of beverage retained in the beverage server. A separate display assembly is provided and selectively couplable to the capacitive sensing probe assembly. A power source is provided and coupled to the display assembly and to the capacitive sensing probe assembly to provide power to sense and display the level of beverage in the server. | 02-05-2009 |
20090126483 | Fluid Monitoring Apparatus and Method - A fluid monitoring apparatus and method is disclosed for use in an underground utility vault. Specifically, a system utilizing multiple sensors to determine the total amount and type of fluid present in a utility vault is disclosed. A first sensor located above the fluid detects and determines the overall depth of fluid present. A second sensor, relying on specific properties of the fluid(s) present, is located in contact with the fluids present. The information regarding specific fluid level and type is conveyed to a central location for monitoring. | 05-21-2009 |
20090133491 | CAPACITIVE LEVEL SENSOR AND MEASURING APPARATUS USING THE SAME - A sensor includes two capacitors, with distances between the capacitor plates being different in the two capacitors. An electrical insulator is provided between the capacitors. The distance between the plates of one capacitor may be sufficiently large to prevent capillary action in the capacitor when an end of the first capacitor is placed in a fluid. The distance between the plates of the other capacitor may be sufficiently small to allow capillary action in the capacitor. The first capacitor measures the level of the fluid. The second capacitor measures the viscosity of the fluid. A third capacitor, completely submerged in the fluid, measures the dielectric constant of the fluid. Also, a measuring apparatus using the sensor. | 05-28-2009 |
20090139325 | Capacitive probes and sensors, and applications therefor, and multimode wireless devices - Sensor includes electrodes on internal layer of multilayer printed circuit board, and sensing circuitry drives electrodes and reads signal having characteristic based upon capacitance between electrodes. Board may have first layer second layer, with electrodes between layers. One layer may be thicker than other layer such that capacitance external to board is primarily contributed from adjacent other layer. Electrodes may be on internal surface and sensing circuitry may be on opposing external surface. Components for sensing circuitry may be assembled to board such that board and components are multilayer printed circuit board assembly. Circuitry having wireless transmitter and wireless receiver, wherein circuitry has operating mode to transmit signals remotely through transmitter and ship mode wherein transmitter is silenced, and in operating mode circuitry listens for signals indicating transmitted signal has been received, and if receiver has not received acknowledgement one signal then circuitry enters ship mode. | 06-04-2009 |
20090145219 | Velocity-of-Propagation Fluid Level Measurement Method - An apparatus for determining a level of a liquid in a tank is provided. The apparatus comprises a probe and electronics. The probe passes into the tank and is immersed in the liquid. The probe includes a fiducial in spaced relation with a distal end. The electronics are operably coupled to the probe. The electronics include a signal generator propagating a signal along the probe and a signal receiver receiving the signal propagated along the probe. The electronics determine a velocity of propagation and/or an amount of time for the signal to travel between the fiducial and the distal end. The level of the liquid in the tank is then determined using the velocity of propagation and/or amount of time. | 06-11-2009 |
20090158841 | Sensor for the contactless detection of the level of a liquid and adhering high-conductivity meduim, especially blood, through a non-metal wall of a container and corresponding method - The invention relates to a sensor for the contactless detection of the level of a liquid and adhering high-conductivity medium, especially blood, through a non-metal container wall. The sensor has a pulse generator ( | 06-25-2009 |
20090165552 | LIQUID LEVEL SENSING DEVICE AND METHOD - A liquid level sensor device ( | 07-02-2009 |
20090173152 | Liquid state detecting sensor - The present invention provides a liquid state detecting sensor that is free from a problem of increase in the number of parts and a problem in assembly and furthermore capable of, in support of electrodes, absorbing an error and supporting both electrodes, even in case an inner electrode has at a surface an insulation layer, without causing any damage to the layer. The liquid state detecting sensor includes an outer tubular electrode | 07-09-2009 |
20090199635 | Method and Apparatus for Sensing Levels of Insoluble Fluids - A method and apparatus for sensing levels of insoluble fluids within a storage vessel utilizing an array of main capacitive sensors having differing geometries. The array of main capacitive sensors gives the ability to measure the levels of insoluble liquids in a vessel. Each of the main capacitive sensors include at least one pair of conductive plates capable of submersion in the at least two insoluble fluids, and the geometries of the pair of conductive plates differ and are distinct, such as in distance or in width, in each of the main capacitive sensors. In addition, the apparatus and method may include at least one reference sensor placed intermittently along the height of the vessel to provide input as to the permittivities of the insoluble fluids. | 08-13-2009 |
20090211356 | Apparatus for Capacitive Ascertaining and/or Monitoring of Fill Level - An apparatus for capacitive ascertaining and/or monitoring of the fill level of a medium in a container. The apparatus includes at least one probe unit, which is electrically insulated relative to the medium, and at least one electronics unit, which supplies the probe unit with at least one electrical, actuating signal, receives an electrical measurement signal from the probe unit, and evaluates the measurement signal as regards the fill level The actuating signal is an electrical alternating voltage signal. The electronics unit is embodied in such a manner that it supplies the probe unit with the actuating signal in a measuring phase, and supplies the probe unit with a test signal in a test phase, and that it receives a test measurement signal in the test phase from the probe unit, wherein the test signal is selected in such a manner that it has at least one section with an essentially constant voltage value. | 08-27-2009 |
20090235738 | METHOD AND DEVICE FOR MEASURING THE CAPACITANCE OF A CAPACITIVE COMPONENT - A method of measuring the capacitance of a capacitive component ( | 09-24-2009 |
20090249871 | LEVEL SENSOR MOUNTING - A method for fixing a fuel level sensor in a fuel tank having an upper and a lower wall, the sensor having a foot and a top. The method fixedly secures the foot of the sensor to the bottom wall of the fuel tank through a molded-in retainer, and elastically fixes the tubular top of the sensor to the top wall the tank through a molded-in retainer as well. | 10-08-2009 |
20090293610 | 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 relationship with the conductor, where the conductor and the shield member are offset from each other. | 12-03-2009 |
20090301188 | Self-Calibrating Capacitive Transducer for Determining Level of Fluent Materials - A capacitive transducer for detecting the level of liquids and other materials has one or more antenna probes connected to an integrated chip normally associated with touch-screen displays. Each antenna probe operates independently and senses the level condition of wet or dry flowable materials such as water, oil, fuel, grain, and so on. The antenna probes may be formed as insulated conductive wires or conductive traces between layers of a stiff or flexible substrate, such as a PCB, with the substrate material serving as the insulating layers. Each antenna probe has a different length representing different depths of the material being measured to provide dynamic calibration of the level condition independent of the material type and ambient conditions. | 12-10-2009 |
20090301189 | CAPACITIVE SENSOR ASSEMBLY FOR DETERMINING LEVEL OF FLUENT MATERIALS - A capacitive sensor assembly for measuring a level of fluent material in a container includes an electronics section for receiving and processing signals and an antenna probe operably associated with the electronics section. The antenna probe has an electrical conductor and an insulating layer that covers at least a portion of the electrical conductor. The electrical conductor is connected to the electronics section. An enlarged measurement portion is in turn connected to the electrical conductor for detecting the presence or absence of the fluent material. The enlarged measurement portion has a surface area that is larger than a surface area of the electrical conductor over an equivalent height or length to function as a first plate of the capacitive sensor assembly, with the fluent material to be measured functioning as a second capacitive plate. In this manner, a change in detected capacitance of the antenna probe is reflective of a level condition of the fluent material. | 12-10-2009 |
20090301190 | CAPACITIVE SENSOR ASSEMBLY FOR DETERMINING RELATIVE POSITION - A capacitive sensor assembly for detecting relative movement or position between objects, such as liquid level in a tank or reservoir, movement of one machine component with respect to another, and so on, includes one or more antenna probes connected to an integrated chip normally associated with touch-screen displays. Each antenna probe operates independently and may be formed as insulated conductive wires or conductive traces between layers of a stiff or flexible substrate, such as a PCB, with the substrate material serving as the insulating layers. Each antenna probe has a different length representing different measurement positions or locations between the objects being measured to provide dynamic calibration of the measurement under changing environmental conditions. | 12-10-2009 |
20090320587 | Capacitive level sensor with a Plurality of Segments Comprising Each a Capacitor and a Circuit - A capacitive level sensor comprises a probe which is longitudinally segmented into a plurality of segments. Each segment comprises an electrode forming an electrical capacitor to a common ground electrode. Each electrode is connected to a measuring circuit via an associated one of a plurality of controllable switches. A control means controls said switches to successively and separately connect the capacitors to the measuring circuit. To simplify the design and manufacture of the level sensor, the controllable switches are individually arranged in the associated segments of the probe, and the control means is subdivided into control units respectively arranged in the segments and connected to a single control line. Alternatively, if a plurality of controllable measuring circuits are individually arranged in the associated segments and connected to an associated one of said electrodes, and if the control means successively and separately activates the measuring circuits, the control means is subdivided into control units respectively arranged in the segments of the probe and connected to a single control line. | 12-31-2009 |
20100005879 | Apparatus for Capacitive Determining and/or Monitoring of Fill Level of a Medium - An apparatus for capacitive determining and/or monitoring of fill level of a medium in a container. The apparatus includes: A probe unit; a control unit, which supplies the probe unit with a drive signal; and an evaluating unit, which receives a response signal from the probe unit and which determines from the response signal a statement concerning fill level. Stored in the evaluating unit are at least a first and a second formula or a first and a second evaluating algorithm; and, in case accretion lies below a predetermined limit value, the evaluating unit determines the statement concerning fill level via a first formula and, in case accretion lies above the predetermined limit value, the evaluating unit determines the statement concerning fill level via a second formula. | 01-14-2010 |
20100071459 | SYSTEM FOR MEASURING A PHYSICAL VARIABLE - The invention relates to a system for measuring a physical variable using a plurality of measuring sensors ( | 03-25-2010 |
20100126268 | FLUID LEVEL SENSOR - A fluid level sensor to determine the level of fluid into a container used in negative pressure wound therapy. The sensor includes an array of conductive plates to produce electric field lines through the container and fluid within, the plates serving as the plates of a capacitor. The plates ( | 05-27-2010 |
20100154534 | METHOD AND APPARATUS FOR CAPACITIVE SENSING THE TOP LEVEL OF A MATERIAL IN A VESSEL - A method and apparatus for sensing the top level of a material in a vessel is disclosed. A method and apparatus for sensing changes in the top level of a material in a vessel is disclosed. | 06-24-2010 |
20100180679 | All Working Condition Continuously Measuring Liquid Level Meter for a Steam Drum of a Boil and the Liquid Level Computing Method Thereof - A type of liquid level gauge for continuous measurement of boiler steam drum under full conditions and its method for calculation of liquid level, this liquid level gauge includes one metal measurement tube and one transmitter. The steam-side pipe connected to steam drum is fitted on the upper part of the metal measurement tube and the water-side pipe connected to steam drum is fitted on the lower part of the metal measurement tube, one insulated jacket pipe is available inside the metal measurement tube and | 07-22-2010 |
20100212419 | FLUID LEVEL MEASURING DEVICE FOR A BEVERAGE DISPENSER - A level sensing apparatus and method of use for use with a beverage server to indirectly sense the level of beverage retained in the server. The server having a body for receiving and retaining beverage with an opening in the body for receiving the level sensing apparatus and beverage there through. The level sensing apparatus includes at least one capacitive sensing probe assembly retained in a housing to separate the probe assembly from contact with beverage. The housing containing the capacitive sensing probe assembly being disposable into the opening in the body of the server. The capacitive sensing probe indirectly sensing at least one level of beverage retained in the beverage server. A separate display assembly is provided and selectively couplable to the capacitive sensing probe assembly. A power source is provided and coupled to the display assembly and to the capacitive sensing probe assembly to provide power to sense and display the level of beverage in the server. | 08-26-2010 |
20100229642 | DISPENSE VOLUME MONITOR FOR ARRAYS - The reagent volume dispensed into wells ( | 09-16-2010 |
20100242595 | TANK MEASUREMENT SYSTEM USING MULTIPLE SENSOR ELEMENTS - A tank or vessel volume measurement apparatus that includes multiple buoyancy elements. The buoyancy elements can be placed within a perforated tube to reduce any effects from turbulent flow within the tank. The multiple buoyancy load sensors are each made of different density or cross sections to cancel out any accumulation of contamination that may collect on the buoyancy elements placed within the fluid and to determine the density or specific gravity of the fluid within the tank. The buoyancy elements are attached to a load sensor or strain gauge that measures the weight or load from the buoyancy element. Temperature of other sensors can be placed on the buoyancy elements or within the tank to collect other readings or to adjust for temperature variations. The buoyancy elements can be fabricated in pieces and assembled on site or within the tank to accommodate taller tanks or height restrictions. | 09-30-2010 |
20100251816 | FUEL GAUGING SYSTEM UTILIZING A DIGITAL FUEL GAUGING PROBE - A fluid measurement system utilizes one or more digital probes that communicate over a digital bus to a fluid gauging computer. The digital probes incorporate a capacitance to digital circuit that converts probe capacitance to a digital value. The digital value is communicated to the fuel gauging computer via a data bus. | 10-07-2010 |
20100294035 | Process for measuring a liquid level in a tank and associated system - Process for measuring a liquid level in a tank and a system suitable for such process that consists in:
| 11-25-2010 |
20100294036 | FLOW SENSOR - A method of monitoring the effectiveness of a liquid distribution system having a body arranged to receive liquid from a supply source and at least one distribution line for receiving liquid from the body, includes sensing the rate at which the liquid flows through the body after supply of the liquid to the body from the supply source. | 11-25-2010 |
20100313653 | Admittance meter for monitoring a medium - An admittance meter having an electrical alternating signal source, a diode ring operated as a synchronous rectifier with at least four diodes connected in series and in the same direction in succession, a measuring sensor, and an evaluation unit. The diode ring is subjected to an alternating signal via first second feed points, which are each connected via two series-connected diodes. The measuring sensor is connected to the first feed point, and the evaluation unit is connected to a first or a second measurement point of the diode ring. The first and second measurement points are each connected via one diode to the first and second feed points, respectively. | 12-16-2010 |
20100313654 | METHOD FOR FILL LEVEL MEASUREMENT - A method for the fill level measurement, in a container in which a first and/or a second fill substance can be located, for each fill substance present in the container. A rest position can be ascertained, which corresponds to the position, which the fill substance upper surface of the respective fill substance assumes due to the amount of the first fill substance present in the container and the amount of the second fill substance present in the container, when the entire amount of each fill substance in the container forms a single layer containing only this fill substance, wherein the first fill substance has a smaller specific weight than the second fill substance, and the two fill substances have different dielectric constants. An electromagnetic signal is sent into the container, reflection takes place on at least one media boundary produced by the fill substances present in the container, wherein a part of the signal is reflected, and for each reflected part there is measured, dependent on the position of the media boundary causing the reflection, a travel time, which this part of the signal requires for the path to this media boundary and back, a capacitance between a capacitive probe and a reference electrode is measured, dependent on the amounts of the fill substances located in the container, and, on the basis of the measured capacitance and the measured travel times for each fill substance present in the container, the rest position of its fill substance upper surface is ascertained. | 12-16-2010 |
20100326186 | FILL LEVEL DETECTION APPARATUS - A fill level detection apparatus ( | 12-30-2010 |
20110000296 | SELF-COMPENSATING CAPACITIVE LIQUID LEVEL DETECTOR - Method and corresponding apparatus for liquid level detection with a liquid level detection unit ( | 01-06-2011 |
20110079078 | Fuel Level Sensor - An fuel level detector includes a substrate fixedly mounted inside an fuel tank, a narrow elongated first electrode arranged on the substrate and kept in contact with the fuel oil in the fuel tank, a second electrode formed of a plurality of electrode elements arranged on the substrate at different elevations in a parallel manner relative to the first electrode, and a sensing circuit formed of a plurality of capacitive sensors that are respectively electrically connected with the electrode elements of the second electrode for detecting the level of fuel oil in the fuel tank subject to a rise in capacitance value between the first electrode and one electrode element of the second electrode. | 04-07-2011 |
20110083504 | Device for measuring the fill level in a liquid container - A device for measuring the fill level in a liquid container has a fill level sensor secured in the liquid container. According to the invention the fill level sensor is supported in pendulum-like fashion on the liquid container about at least one rotary axis. | 04-14-2011 |
20110107833 | CAPACITIVE DETECTOR, METHOD FOR MANUFACTURING SAME, AND DEVICE FOR MEASURING THE INTEGRAL - Capacitive detector and measuring device integrating it; the detector including: a ribbon made of a dielectric material, first and second electrodes in the form of combs formed on a first surface of said ribbon and a third electrode formed on the other surface of said ribbon opposite said first and second electrodes; the thickness (e) of the dielectric ribbon is less than or equal to said determined period (λ) divided by four times PI, i.e.: λ/4π≧e; and the ratio resulting from the division, as numerator, of the capacitance (C) between two adjacent branches of said first and second electrodes in the presence of at least one fluid with a dielectric permittivity (∈ | 05-12-2011 |
20110113878 | LIQUID-LEVEL SENSOR - In a liquid level sensor according to the present invention, a first detecting electrode being always in a liquid to be measured, a second detecting electrode which measures a level of the liquid to be measured, and a third detecting electrode being always out of the liquid to be measured are arranged, an operation of charging capacitor | 05-19-2011 |
20110120219 | CAPACITIVE LIQUID LEVEL SENSOR - The invention relates to a capacitive sensor ( | 05-26-2011 |
20110146399 | 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 are aligned in a vertical array and each comprise a substantially planar pattern of “electrodes” or conductive traces disposed on a printed circuit board (FOB) along with integrated circuits used to create a loop or arc-shaped electric field. As bilge liquid rises to the proximity or level of the field effect sensors, a change in the arc-shaped electric field is sensed and, in response, a bilge pump is automatically actuated to pump liquid out of the bilge. Optionally, the pump control can be programmed by use of a microprocessor to permit control of on-off timing and prevent undesirable effects of “sloshing.” | 06-23-2011 |
20110162448 | FUEL SYSTEM ELECTRO-STATIC POTENTIAL DIFFERENTIAL LEVEL SENSOR ELEMENT AND HARDWARE/SOFTWARE CONFIGURATION - This invention relates to a sensor element in a fuel system, and in particular, to an electro-static potential differential level sensor element for measuring fuel levels and fuel type in a fuel system. A sensor element includes two electrode plates mounted on a dielectric material and secured to a shield plate. The sensor element is extruded to form a three dimensional sensor element, such as a spiral coil, that has an increased capacitance detection ability to measure fuel type and level. | 07-07-2011 |
20110185808 | CAPACITIVE FILL LEVEL SENSOR AND METHOD FOR ESTIMATING A FILL LEVEL - A capacitive fill level sensor for determining a fill level of a liquid is described. Two electrodes are provided having a plastic sheathing and a capacitance measuring device for detecting the electrical capacitance between the electrodes. An estimator device is used for estimating a fill level of a liquid between the electrodes based on the detected electrical capacitance, taking into account different dielectric constants for sections of the plastic sheathing in the liquid and outside of the liquid. | 08-04-2011 |
20110203366 | WATER LEVEL SENSING APPARATUS - There is provided a water level sensing apparatus including: a body disposed to be exposed within a liquid tank and having an accommodating space therein; and a capacitance detecting unit accommodated in the accommodating space of the body, wherein the capacitance detecting unit compares an upper side capacitance value and a lower side capacitance value and turns on or off an output signal. Because a changeable reference that the capacitance values of a reference surface and a detected surface of the body are simultaneously changed is used, even if the body comes in contact with moisture or debris, the reference surface and the detected surface are equally affected by the moisture or debris, thus reducing the occurrence of malfunction. | 08-25-2011 |
20110239757 | Capacitive Measuring Method and Apparatus for Fill Level Detection and Correspondingly Equipped Laboratory Equipment - The invention relates to apparatuses ( | 10-06-2011 |
20110259098 | LEVEL SENSING APPARATUS - There is provided a level sensing apparatus detecting the level of a detected material, the apparatus including: a circuit board; a first electrode and a second electrode having different dimensions, which are formed on one surface and the other surface of the circuit board; a first dielectric layer and a second dielectric layer having different thicknesses, which are formed on the first electrode and the second electrode; and a judgment unit electrically connected with the first electrode and the second electrode through the circuit board to judge the level of the detected material by using capacitances detected from the first electrode and the second electrode. According to the present invention, it is possible to accurately sense a level without being influenced by surrounding circumstances such as temperature, and the like. | 10-27-2011 |
20110265562 | NON-CONTACT LIQUID LEVEL SENSING SYSTEM FOR HOUSEHOLD ELECTRIC APPLIANCES - A non-contact liquid level sensing system for an electric appliance is provided. The electric appliance includes a liquid container for containing liquid. The non-contact liquid level sensing system includes a micro-controller and a plurality of sensors vertically aligned and mounted to the inside of the liquid container. The micron-controller includes a non-volatile memory for storing data. Each of the sensors includes a circuit board, a sensor pad made of a conductive material mounted on the circuit board, and a cover plate made of a dielectric material covering and being in direct contact with the sensor pad. The micro-controller is electrically connected with the sensors, and configured to measure the capacitance between the sensor pad of each sensor and a reference electric potential, and to determine a liquid level in the liquid tank based on the measured capacitance and the data stored in the non-volatile memory of the micro-controller. | 11-03-2011 |
20110290013 | Motionless liquid level gauge having three electrodes - A capacitive probe comprises a first electrode, a second electrode, and a third electrode. A cap is positioned on a first end of the first electrode and a first end of the second electrode. A base is positioned on a second end of the first electrode, a second end of the second electrode, and a second end of the third electrode. A support is positioned on a first end of the third electrode and in contact with a surface of the second electrode. The electrodes can be coaxial cylinders or parallel plates. The gauge can be used with a system for measuring a quantity and quality of a liquid, more specifically, of an aqueous urea solution in the tank of an SCR system. | 12-01-2011 |
20110314907 | CONTACTLESS FILLING LEVEL MEASUREMENT OF LIQUIDS - The invention relates to a device and a method for the contactless capacitive filling level measurement of a filling medium in a container, the device having a plurality of measurement electrodes and at least one reference electrode. | 12-29-2011 |
20120024055 | Method, System and Apparatus for Incorporating Capacitive Proximity Sensing in an Automated Fluid Transfer Procedure - A fluid transfer apparatus includes a fluid transfer probe, a fluid level detection system, and a tip detection system. The fluid level detection system is configured to detect contact by the fluid transfer probe with a fluid surface within a receptacle from a signal based on the capacitance of the fluid transfer probe. The tip detection system is configured to detect the presence or absence of a tip at a distal end of the fluid transfer probe from a signal based on the capacitance of the fluid transfer probe. | 02-02-2012 |
20120111107 | LIQUID TANK AND FUEL CELL - Provided are a liquid tank capable of reducing an influence of disturbance on measurement results and measuring accurate volume, and a fuel cell using the same. One face of a liquid container section is structured by a detector in which a first board to a fourth board each configured of a printed board are stacked in order. A pair of detection electrodes | 05-10-2012 |
20120160025 | FILLING-LEVEL MEASURING DEVICE - Filling-level measurement device with a housing and a measurement cell arranged inside the housing, wherein the measurement cell comprises an essentially cylindrical measurement cell body, which comprises a membrane arranged crosswise relative to a longitudinal axis of the measurement cell body, wherein the measurement cell is mounted in the housing by a circumferential sealing element, which is arranged between the measurement cell body and the housing, wherein the sealing element is arranged in axial direction of the measurement cell in such a way that a measurement signal emitted by the measurement cell is independent from a compression of the sealing element. | 06-28-2012 |
20120167678 | HTA Fluid Level and Fluid Type Measurement - Apparatus for measuring an amount of ablation fluid circulating in a system for ablating tissue comprises a plurality of electrical contacts located within an ablation fluid receiving chamber of the system, the contacts being located at various heights and a data processing arrangement coupled to the contacts to receive data corresponding to electrical conductance between pairs of the contacts, the data processing arrangement determining a height of fluid in the chamber based on the measured conductance levels and determining based on the determined height, whether an amount of fluid circulating through the system is within a desired range. | 07-05-2012 |
20120240675 | Self-Calibrating Capacitive Liquid Level Sensor Assembly and Method - A method of determining level of a liquid between empty and full conditions within a container includes: providing first and second elongate capacitors, each capacitor being independently capable of measuring the liquid level at least between the empty and full conditions within the container, with the second capacitor being longer than the first capacitor; determining first and second capacitance values for the first and second capacitors, respectively, based on the liquid level height; and dividing the first capacitance value by a difference between the second and first capacitance values to thereby obtain a liquid level value independent of the dielectric constant. | 09-27-2012 |
20120291541 | DIGITAL FIELD-INDUCTION WATER-LEVEL INTELLIGENT SENSING SYSTEM AND ITS IMPLEMENTATION METHOD - A digital field-induction water-level intelligent sensing system is provided. The digitalized intelligent field-induction field technology is utilized in the sensing system, thus the problem of water scale formation on the water-level sensors when applied in the severe environment and the problem of sensing system failure easily happening in the high temperature and high humidity environment are solved. The application of the field-induction technology enables the sensing system to detect the water level without electrical connection or mechanical connection, thus the problems of the sensor failure or inaccurate water-level detection caused by the water scale formation are avoided. | 11-22-2012 |
20120304761 | FLUID LEVEL MEASUREMENT APPARATUS AND SYSTEM - A fluid level measurement system includes a fluid level sensor, a voltage application circuit, and a measurement circuit. The fluid level sensor includes a rotating member rotating depending on a fluid level, a supporting member for rotatably supporting the rotating member, and a variable resistor having a resistance depending on a rotation angle of the rotating member. The application circuit applies an AC voltage to the resistor. The measurement circuit measures the fluid level based on the resistance. A resistive portion of the resistor is held by the supporting member and extends around the rotation center of the rotating member. A movable portion of the resistor is held by the rotating member and has a contact surface made of mainly gold. When the rotating member rotates, the movable portion moves along the resistive portion with the contact surface in contact with the resistive portion. | 12-06-2012 |
20120324995 | System and Method For Product Level Monitoring in A Chemical Dispensing System - A system and method for monitoring the levels of product in a chemical dispensing system. A probe assembly is operatively disposed in a container holding product to be dispensed. A detection circuit including an oscillator sensitive to the impendence coupled to the detector is selectively coupled to the probe assembly and produces a signal in response to the impedance of the probe assembly indicating if the level of product in the container has dropped below the probe assembly. The probe assembly includes conductive probes formed from corrosion resistant material infused with carbon and separated by an angle. The level of the first and second conductive probes is adjustable to provide control over the level of product to be detected. Multiple probe assemblies may be selectively coupled to the detection circuit in a repeating sequence by a multi-probe monitoring unit to allow monitoring of multiple containers by a single remote alarm. | 12-27-2012 |
20130061669 | LEVEL DETECTOR FOR MEASURING FOAM AND AERATED SLURRY LEVEL IN A WET FLUE GAS DESULFURIZATION ABSORBER TOWER - A level detector | 03-14-2013 |
20130068015 | OIL SENSOR - A system and method for measuring oil level and quality is provided. The system and method uses an alternating current (AC) to determine oil level, and a lower frequency alternating current, or a direct current (DC), to measure oil quality. The system may comprise a single sensor that is used to measure both oil quality (by providing the lower frequency alternating current or direct current) and oil level (by providing the higher frequency alternating current). Using the lower frequency AC, or DC, enables the resistance of the oil to be determined, which gives an accurate indication of the oil quality. | 03-21-2013 |
20130074594 | FLUID TILT SENSOR WITHIN INK TANK SUPPLY ITEM FOR MICRO-FLUID APPLICATIONS - A container for holding a volume of fluid and having a housing defining an interior for retaining the volume of fluid; at least one in-tank tilt sensor connected to a controller and disposed inside the housing for generating a signal corresponding to a level of fluid inside the housing; and a support material attached to the housing and connected to the at least one in-tank tilt sensor to mechanically support the at least one in-tank tilt sensor such that the at least one in-tank tilt sensor is not in direct contact with the fluid inside the housing. The in-tank tilt sensor detects a change in fluid level which may only be caused by tilting of the imaging device. When tilting is registered, protective action is taken to prevent fluid from leaking. | 03-28-2013 |
20130074595 | FLUID TILT SENSOR WITHIN INK TANK SUPPLY ITEM FOR MICRO-FLUID APPLICATIONS - A container for holding a volume of fluid and having a housing defining an interior for retaining the volume of fluid; at least one in-tank tilt sensor connected to a controller and disposed inside the housing for generating a signal corresponding to a level of fluid inside the housing; and a support material attached to the housing and connected to the at least one in-tank tilt sensor to mechanically support the at least one in-tank tilt sensor such that the at least one in-tank tilt sensor is not in direct contact with the fluid inside the housing. The in-tank tilt sensor detects a change in fluid level which may only be caused by tilting of the imaging device. When tilting is registered, protective action is taken to prevent fluid from leaking. | 03-28-2013 |
20130118254 | APPARATUS FOR DETERMINING AND/OR MONITORING A PREDETERMINED FILL LEVEL - An apparatus for determining and/or monitoring at least one fill level of a medium in a container comprising: a capacitive or conductive probe unit having at least one electrode; and a control/evaluation unit. The electrode is a hollow body, that an end region of the electrode protruding into the container is embodied as an oscillatable membrane. On an inner side of the membrane a driving/receiving unit is arranged, which excites the membrane to execute mechanical oscillations and receives mechanical oscillations therefrom and converts such into an electrical, received signal. The control/evaluation unit supplies the electrode at least at times with a voltage and determines the fill level of the medium capacitively or conductively, and/or that the control/evaluation unit supplies the driving/receiving unit at least at times with an exciter signal and determines from the electrical received signal the fill level of the medium. | 05-16-2013 |
20130125645 | FLEXIBLE FLUID LEVEL SENSOR - A capacitance fluid level sensor constructed with an elongate probe element, the probe element consisting of two concentrically positioned coil springs separated by insulators. The probe elements are deformable to facilitate placement of the fuel probe in a vessel of fluid to be measured. | 05-23-2013 |
20130152676 | CAPACITIVE LEVEL GAUGE - A fuel gauge ( | 06-20-2013 |
20130186196 | APPARATUS AND METHOD FOR REDUCING CROSS-TALK BETWEEN CAPACITIVE SENSORS - An apparatus and method is provided to reduce cross-talk between multiple capacitive sensors used in an electronic toilet and between multiple capacitive sensors used in an electronic faucet and an electronic soap dispenser. | 07-25-2013 |
20130276532 | LEVEL MEASURING DEVICE - A liquid level measuring device may comprise a fuel tank that stores fuel, a fuel pump that sucks the fuel in the fuel tank and pumps the fuel toward a combustion apparatus, a fuel discharging portion that discharges the fuel from the fuel pump into the fuel tank, a ease that receives the fuel discharged from the fuel discharging portion and a pair of liquid level-sensitive electrodes that is accommodated in the case so as to measure capacitance that changes with the liquid level. The case may have a fuel permeating property to equalize the liquid level inside the case and the liquid level outside the case. | 10-24-2013 |
20130276533 | DEVICE FOR MEASURING FLUID LEVEL IN A CONTAINER - The concerns a measurement device and system utilizing the same for precise measuring the fluid level in a container, the measurement device ( | 10-24-2013 |
20130283905 | LIQUID STATE DETECTION SENSOR - A liquid state detection sensor capable of detecting a large number of objects with a small number of terminals. The liquid state detection sensor is provided with three terminals A to C, a capacitor C | 10-31-2013 |
20130283906 | FLUID LEVEL SENSOR APPARATUS - A fluid level sensor apparatus with zero thermal shift and auto calibration is provided, the sensor apparatus comprising a measurement probe, a base probe and a processor; wherein each probe includes a reference electrode in contact in use with the fluid, the base probe further including a dry electrode and the measurement probe further including a wet electrode and wherein the processor is adapted to measure the capacitance of the two probes and calculate the fluid level according to a pre-determined algorithm. | 10-31-2013 |
20130298667 | Apparatus and Method for Capacitive Fill Level Measurement - The invention relates to an apparatus for capacitive determining and/or monitoring at least of fill level of a medium in a container, comprising a probe unit having at least one probe electrode, and an electronics unit, which supplies at least the probe electrode with an electrical, transmitted signal, and receives and evaluates an electrical, response signal from the probe unit. Besides relating to an apparatus, the invention also relates to a corresponding method. The invention is distinguished by features including that an electronics unit supplies the probe electrode at least at times by means of a frequency sweep with a transmitted signal, which has a plurality of discrete frequencies following one another within a predeterminable frequency band, that the electronics unit, based on the frequency sweep, ascertains a measuring frequency optimal for present application parameters, and that the electronics unit determines fill level from the response signal belonging to the optimal measuring frequency. | 11-14-2013 |
20130319108 | Liquid Level Monitoring - A method and an apparatus for filling at least one liquid into at least one cavity. The method comprises filling a predetermined filling volume of the at least one liquid into the at least one cavity and determining if the liquid in the at least one cavity reaches a first liquid level in the at least one cavity. Filling the predetermined filling volume of the at least one liquid and the determining if the first level has not been reached, is repeated until enough volume of the at least one liquid has been added to the cavity or if the first level has been reached. The predetermined filling volume is equal to or smaller than a buffer volume above the first liquid level in the at least one cavity. | 12-05-2013 |
20130333466 | Probe Unit - A probe unit comprising a probe housing, an at least sectionally rod-shaped, probe electrode, a supplemental electrode, which surrounds the probe electrode at least sectionally coaxially and is isolated from the probe electrode by an electrical insulation. A first securement means, by means of which the supplemental electrode is secured in the probe housing is included, and a contacting module, which is mountable on a rod-shaped section of the probe electrode arranged in the probe housing, and which has a flexible circuit board having at least one first conductive trace for electrically contacting the probe electrode and at least one second conductive trace for electrically contacting the supplemental electrode, and a second securement means for securing the contacting module on the probe electrode are provided. | 12-19-2013 |
20140007676 | CAPACITIVE LIQUID LEVEL SENSOR - A capacitive liquid level sensor is provided comprising a capacitive probe having a capacitance and comprising a sensing tip wherein the capacitive probe is configured such that the capacitance of the probe changes when the sensing tip is exposed to liquid. A signal generator operates to supply an electrical signal alternating between a high and low state to the capacitive probe, the electrical signal being configured such that the probe is alternately charged and discharged when the signal is high or low respectively. A comparator operates to detect the magnitude of an electrical signal across the capacitive probe and provides a first output signal value when the detected signal magnitude is greater than a predetermined threshold value and a second output signal value when the signal magnitude is less than the threshold value. A timer operates to receive an output signal from the comparator and measures a time period starting when the comparator output signal transitions to the first output signal value and ending when the comparator output signal transitions to the second output signal value. Liquid detection means also operate to utilise the time period measured by the timer to determine if the sensing tip is exposed to liquid. | 01-09-2014 |
20140020463 | LIQUID SENSOR - A liquid sensor may comprise a base and a first electrode and a second electrode supported by the base. The first electrode may comprise a plurality of first electrode parts disposed at an interval in a first direction and extending along a second direction being different from the first direction and a second electrode part electrically connecting the plurality of first electrode parts. The second electrode may comprise a plurality of third electrode parts extending along the second direction, the plurality of first electrode parts and the plurality of third electrode parts being disposed alternately in the first direction and a fourth electrode part electrically connecting the plurality of third electrode parts. An opening configured capable of passing the liquid through may be disposed between adjacent first electrode part and third electrode part. | 01-23-2014 |
20140109667 | Method and Apparatus for Water Level Sensing - An apparatus and method of sensing fluid level in reservoir for calculating fluid flow there from. The method comprising the steps of: receiving a plurality of fluid level signals each indicative of respective fluid level state at a predetermined location within the reservoir; identifying change of a first fluid level state; recording a relative first time, with respect to fluid flow duration, at which the first fluid level state changed; and calculating fluid dispensed from the reservoir using the fluid flow duration and an average fluid flow rate associated with the respective fluid level location within the reservoir. The apparatus comprising: a plurality of fluid level probe elements located within the reservoir, each adapted to provide a respective fluid level signal; and a processor module adapted to receive receiving a plurality of fluid level signals. | 04-24-2014 |
20140190253 | AUTOMATIC ANALYZER AND METHOD FOR DETERMINING MALFUNCTION THEREOF - An automatic analyzer which performs a suction operation a plurality of times on a same sample has a sample dispensing unit | 07-10-2014 |
20140208846 | METHOD AND DEVICE FOR CAPACITIVE FILL LEVEL MEASUREMENT OF LIQUIDS OR BULK MATERIALS - A method for capacitive fill level measurement of liquids and/or bulk materials in a container using at least one measuring sensor that is connected to a measuring electronics, wherein the measuring sensor is constructed from a plurality of, at least three, electrodes which are electrically insulated from one another and which, for measuring the fill level, are inserted into the container, and in the inserted state extend into the container, and wherein these at least three electrodes are connected to the measuring electronics and are operated in at least one first or in at least one second measuring mode. The invention further relates to a device for capacitive fill level measurement of liquids and/or bulk materials in a container. | 07-31-2014 |
20140230544 | LIQUID LEVEL MEASURING DEVICE - A liquid level measuring device for measuring a liquid level of liquid stored in a container may comprise a discharging unit, a first storing space, and an electrode unit. The discharging unit may be configured to discharge the liquid compressed by a pump. The pump may be configured to suck the liquid stored in the container and feed the liquid toward a liquid usage device by pressure. The first storing space may be located in the container and configured to accept the liquid discharged from the discharging unit. The electrode unit may be disposed in the first storing space and comprising a first pair of electrodes configured to measure the liquid level of the liquid within the first storing space. The electrode unit may compose at least a part of a wall surface defining the first storing space. | 08-21-2014 |
20140305202 | LIQUID LEVEL SENSING SYSTEMS - A liquid level sensing system includes a vessel and an electrode. The vessel includes a vessel wall separating a vessel interior from a vessel exterior. The electrode is mounted to an exterior side of the vessel wall spanning a distance corresponding to a desired-level-determining range. The vessel wall is a dielectric gap between the electrode and the vessel interior. The electrode is configured to collect a charge corresponding to a liquid level. A method for determining a liquid level in a vessel includes collecting a charge on an electrode, sensing the collected charge on the electrode with a capacitance sensor through an electrical line, and determining a liquid level in a vessel based on the collected charge sensed by the capacitance sensor. | 10-16-2014 |
20140326066 | CALIBRATION-FREE CONTINUOUS BIN LEVEL SENSOR - A sensor assembly is described herein that can automatically calibrate itself upon installation into an empty bin, eliminating the need to actually fill the bin to calibrate the level reading. The sensor will provide consistent measurement regardless of material properties (permittivity, density, temperature or moisture content). The capacitive nature of the sensor means that in some circumstances, it will sense the material through plastic/glass/fiber glass thereby allowing the sensor assembly to be mountable on the outside of a bin or container. The electrodes of the sensor system are designed to provide a continuous level reading. | 11-06-2014 |
20140331763 | FUEL LEVEL MEASUREMENT USING IN-TANK MEASURING SYSTEM - An apparatus for measuring the level of fuel in a fuel tank is disclosed. The apparatus comprises an in-tank measuring system that provides an oscillating output signal generated, for example, by an oscillator such as a multivibrator, where the oscillating output signal has a frequency corresponding to the fuel level. The in-tank measuring system includes a capacitive fuel probe mounted within the fuel tank to contact the fuel. The fuel probe has a capacitance that is a function of the level of the fuel. The oscillator is configured for mounting within the fuel tank at a position in close proximity to the capacitive fuel probe. The oscillator circuit uses the capacitance of the fuel probe to generate the oscillating output signal. A communication path communicates the oscillating output signal from the clock circuit to a circuit exterior to the fuel tank. | 11-13-2014 |
20140352428 | LIQUID PROPERTY DETECTING DEVICE - A liquid property detecting device may be configured to be disposed in a liquid feeding unit including a container, a pump, and a feed pipe. The liquid property detecting device may comprise a first pair of electrodes and a filter. The first pair of electrodes may be configured to be disposed upstream of the feed pipe in a direction in which the liquid stored in the container flows while the pump is driving. The first pair of electrodes may be configured to detect a liquid property of the liquid stored in the container. The filter may be configured to be disposed upstream of the first pair of electrodes in the direction in which the liquid stored in the container flows while the pump is driving. | 12-04-2014 |
20140352429 | ELECTROSTATIC CAPACITANCE FLUID LEVEL SENSOR - In an electrostatic capacitance fluid level sensor including fluid level detection electrode plates mounted on conductive pins mounted on a hermetic terminal, a fluid level detection part mounted on the hermetic terminal has a detection unit including two electrodes, electrically insulating spacers fixing a positional relationship between the electrodes, and at least one connecting terminal configured to connect and fix the detection unit to the conductive pins. The connecting terminal is deformable by a weaker force than a force causing the electrodes to deform. As a result, stress applied to the electrodes of the detection unit is dispersed/relaxed. Since the detection unit is further connected and fixed to the hermetic terminal for a motor compressor, a work for mounting the sensor to the hermetic motor compressor can be rendered easier as well as the handling of the sensor. | 12-04-2014 |
20150033846 | VEHICLE ORIENTATION DEVICE AND METHOD - A vehicle ( | 02-05-2015 |
20150033847 | NON-INVASIVE RADIO FREQUENCY LIQUID LEVEL AND VOLUME DETECTION SYSTEM AND METHOD USING PHASE SHIFT - A medical fluid system includes a container holding a fluid at a level; and a radio frequency level sensor operably connected to the container and including an emitting electrode and a receiving electrode, the electrodes operating as a transmission line having an electrical impedance that varies with the level or volume of the fluid in the container, the level sensor configured to measure a phase shift of the transmission line, the phase shift indicative of the level or volume of the fluid in the container. | 02-05-2015 |
20150114106 | CAPACITIVE LEVEL GAUGE ASSEMBLY FOR A CONTAINER OF PRESSURISED OR LIQUIFIED GAS - A capacitive level gauge assembly for a pressurised or liquefied gas container comprises a body ( | 04-30-2015 |
20150122015 | CAPACITIVE LEVEL SENSOR - A capacitive liquid level sensor in which a vessel for receiving the liquid has a deflector inside the vessel extending upwardly from the base, and which tapers towards its top. This means the liquid is confined to the edges of the vessel at the bottom of the vessel, which gives improved resolution for small amounts of liquid. The deflector also acts as a baffle resisting liquid flow when there is tilting of the vessel. | 05-07-2015 |
20150292933 | Method and Device for the Automated Classification of a Liquid as Well as Method and Device for the Automated Adaption of Presettings for a Capacitive Liquid Level Measurement | 10-15-2015 |
20150323372 | Temperature Compensated Transmission Line Based Liquid Level Sensing Apparatus and Method - A sensor having a transmission line acting as a probe and an electronic circuit measures liquid levels. The sensor circuit uses a periodic signal generator to produce a carrier wave, which stimulates the transmission line, through a complex network coupling element. The complex impedance network forms a voltage divider with the transmission line, wherein the output of the voltage divider, is demodulated with an AM demodulator, such as a thermally compensated peak detector. This demodulated signal is related to the dielectric constant, and thus the liquid level of the material surrounding the partially submerged transmission line probe. The liquid level and the demodulated signal may be offset, scaled and linearized with a microcontroller containing signal processing routines, linearizing equations, stored calibration constants and look up tables. | 11-12-2015 |
20160003663 | CAPACITIVE LIQUID LEVEL MEASUREMENT WITH DIFFERENTIAL OUT-OF-PHASE CHANNEL DRIVE TO COUNTERACT HUMAN BODY CAPACITANCE - Capacitive liquid level measurement uses differential out-of-phase (OoP) channel drive to counteract human body capacitance. In an example embodiment, a container assembly includes a capacitive sensor with symmetrical CHx and CHy capacitor electrodes, corresponding in height to a liquid level measurement range. A CHx driver provides a CHx excitation/drive to the CHx electrode, and a CHy driver provides OoP CHy excitation/drive to the CHy electrode that is substantially 180 degrees out-of-phase with the CHx drive. Capacitance associated with the liquid level is measured by acquiring capacitance measurements through the CHx channel (such as based on capacitive charge transfer), and converting the capacitance measurements to an analog voltage corresponding to liquid-level capacitance (which can then be converted to digital data). The capacitive sensor can be configured with SHLDx/SHLDy shields disposed behind, and driven in phase with, respective CHx/CHy electrodes. | 01-07-2016 |
20160018248 | Method and Apparatus for Monitoring a Predefined Filling Level of a Medium in a Container - A method and an apparatus for monitoring a set fill level of a medium in a container using a fill level measuring probe that is designed to operate as a conductive fill level measuring probe in a conductive operating mode and as a capacitive fill level measuring probe in a capacitive operating mode, with a control/evaluation/output unit that is designed to alternately trigger conductive operating mode and capacitive operating mode, and with a control/evaluation/output unit that determines whether the set fill level of the medium in the container has been reached on the basis of the measured values from the two operating modes, and which generates a message when the set fill level is exceeded and/or undershot. | 01-21-2016 |
20160025545 | LIQUID CONSUMPTION TRACKER - Provided is a sensor operative to track changes in a liquid level of a hand-held liquid container, the sensor comprising: an ultrasonic liquid-level sensor configured to indicate a liquid level of a liquid in a hand-held liquid container, wherein the ultrasonic liquid-level sensor is capable of indicating the liquid level when the surface of the liquid is less than 20 centimeters away from the ultrasonic liquid-level sensor; a radio transmitter; and a processor configured to draw power from a portable power source, receive liquid-level indications from the ultrasonic liquid-level sensor, and cause the radio transmitter to transmit data indicative of changes in the liquid level. | 01-28-2016 |
20160025546 | METHOD AND DEVICE FOR DISTINGUISHING BETWEEN A FOAM AND/OR LIQUID CONTACTING - A method and device for distinguishing between a contacting of foam ( | 01-28-2016 |
20160038070 | IMPROVED URINE MEASUREMENT DEVICE AND METHOD - A urine handling system capsule ( | 02-11-2016 |
20160041021 | CAPACITIVE LIQUID LEVEL DETECTION DEVICE - Provided is a capacitive liquid level detection device capable of determining liquid level and liquid quality. This detection device comprises a plurality of electrode pairs disposed at different positions in a height direction in a tank for storing liquid; a measuring instrument for acquiring values equivalent to capacitance between respective electrode pairs of the plurality of electrode pairs; a storage part for storing a plurality of threshold values determined based on values equivalent to capacitance between one of the electrode pairs in the presence of the air or a plurality of kinds of liquids; and a determination part comparing the values equivalent to capacitance between the respective electrode pairs with each of the threshold values, and the determination part determines for determining liquid level corresponding to liquid quality based on the comparison result. | 02-11-2016 |
20160047683 | CAPACITIVE FILL LEVEL SENSOR - A capacitive fill level sensor for measuring the fill level of a medium in a container has an electrode unit, which contains a strip-shaped measurement electrode, a strip-shaped counter electrode and a strip-shaped shielding electrode, the shielding electrode at least partially surrounding the measurement electrode. A first AC voltage source having a predefined frequency and amplitude is provided, to which the shielding electrode is connected such that a shielding capacitor formed between the shielding electrode and the measurement electrode has a shielding capacitance that is proportional to the length of the shielding electrode. A second AC voltage source of equal frequency and a predefined second amplitude is provided, the second amplitude being in phase opposition to the first amplitude, to which AC voltage source the counter electrode is connected, such that a measurement capacitor formed between the counter electrode and the measurement electrode has a measurement capacitance that is proportional to the fill level. The measurement electrode voltage present at the measurement electrode is used to determine the fill level. | 02-18-2016 |
20160116322 | METHOD FOR MONITORING AT LEAST ONE MEDIA-SPECIFIC PROPERTY OF A MEDIUM - A method and an apparatus for monitoring at least one media-specific property of a medium in automation technology with a measuring probe, wherein the at least one media-specific property is ascertained in a conductive operating mode and in a capacitive operating mode of the measuring probe. The conductive operating mode and the capacitive operating mode are operated alternately, wherein based on the measured values, which are ascertained in at least one of the two operating modes, it is checked, whether the at least one media-specific property to be monitored lies within a predetermined tolerance band, and wherein a report and/or a switching signal is generated, when the at least one media-specific property to be monitored lies outside of the predetermined tolerance band. | 04-28-2016 |
20160146656 | Fill Level Measurement System - A fill-level measurement apparatus for measuring a fill level of a fluid in a container includes a housing having a first end and a second end and first and second substantially identical thin capacitive sensors mounted on a carrier plate in the housing. The carrier plate includes a circuit board and a microcontroller is mounted on the circuit board. The first sensor is mounted in the housing at a first distance from the first end with a surface portion in contact with a first inner wall portion of the housing, and the second sensor is mounted in the housing between the first sensor and the second end of the housing with a clearance of 0.5 to 10 centimeters from a second inner wall portion of the housing, and the first sensor and the second sensor are configured to communicate with the microcontroller. | 05-26-2016 |
20160187179 | SEALED HEAD CONSTRUCTION FOR LIQUID LEVEL TRANSDUCERS - A liquid level transducer ( | 06-30-2016 |
20160202103 | A PROBE FOR MONITORING THE SURFACE LEVEL OF A FLUID IN A VESSEL AND A METHOD OF INSTALLING THE PROBE IN THE VESSEL | 07-14-2016 |
20160202104 | CAPACITANCE MEASUREMENT DEVICE, CAPACITANCE-TYPE SHEET-SHAPED SENSOR APPARATUS, AND CAPACITANCE-TYPE LIQUID-LEVEL DETECTOR APPARATUS | 07-14-2016 |
20180023992 | A METHOD AND SYSTEM FOR SENSING A LIQUID LEVEL | 01-25-2018 |
20180023993 | CAPACITIVE CONTINUOUS FLUID LEVEL SENSOR | 01-25-2018 |
20190145812 | LIQUID DETECTION APPARATUS | 05-16-2019 |