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| Number | Title | Issue Date |
| 8181515 | Fluid level indicator strip A fluid level indicator strip measures the level of water in a closed receptacle containing a volume of fluid within an impermeable liner. The strip is a flexible, thin and impermeable elongate strip having a first pressure sensing part disposed vertically within th... | 05/22/2012 |
| 7406871 | Fuel type identifying apparatus A fuel tank is allowed to hold any of types of liquid fuels and currently hold one type of liquid fuel. A light emitting element outputs a light beam of a predetermined emission spectrum to the liquid fuel of the fuel tank. The liquid fuel changes the light beam to ... | 08/05/2008 |
| 7389688 | Indirect liquid level measurement A tank level detection apparatus for indirect measurement of a liquid level in a tank is disclosed. The apparatus includes a second liquid at least partially stored in a reservoir and a one-way valve, which communicates between the reservoir and the tank. A sensor i... | 06/24/2008 |
| 7363827 | Torque sensor system including an elliptically magnetized shaft A torque sensor includes a shaft and a magnetic sensor. The shaft may have at least one active region having an elliptical magnetization. The magnetic sensor may be configured to sense a magnetic field about the shaft, where the magnetic field is representative of a... | 04/29/2008 |
| 7322247 | Gasket having a fiber-optic pressure sensor assembly A sensor assembly includes a stainless steel tubular housing. Within the housing is a polyetheretherketone tube and a sensor. An optical fiber joins the sensor to a transmission cable and is fixedly positioned within the tube. A first end of the housing includes a p... | 01/29/2008 |
| 7324901 | Water measurement auto-networks Water measurement auto-networks and methods of operation are disclosed herein. An exemplary method may include determining a water level at a first water measurement station in an auto-network. The method may also include reducing power to at least a transmitter at ... | 01/29/2008 |
| 7311014 | Sensor and sensor assembly The invention relates to a sensor comprising a sensor element (1) for detecting a physical variable, said sensor comprising two electric contact surfaces (2), and comprising a sensor body (3), on one end of which the sensor element (1) an... | 12/25/2007 |
| 7258006 | Sight gauge shield and method A one-piece molded polymeric sight gauge shield with internal cylindrical bore and method for making same are disclosed, along with a liquid-containing urn including same. The shield is molded by mating first and second mold portions about first and second spaced-ap... | 08/21/2007 |
| 7251996 | Liquid detecting piezoelectric device, liquid container and mounting module member A liquid detection device attached on a liquid container for detecting a liquid consumption status of the liquid contained in the liquid container, the liquid detection device including a vibrating section symmetrical about a center thereof, and at least one electro... | 08/07/2007 |
| 7251998 | Liquid measurement system having a plurality of differential pressure probes The weight of liquid in a tank subject to tilting is determined by measuring differences in air pressure in the ullage (the empty volume of the tank above the level of the liquid) and the air pressure produced by the weight of the liquid at the bottom of the tank. T... | 08/07/2007 |
| 7225670 | Mounting structure, module, and liquid container The mounting structure for mounting the piezo-electric device (106) used to detect the consumption condition of the liquid in the liquid container (1) to the liquid container (1), having the receiving portion (363) to which the piezo-elec... | 06/05/2007 |
| 7134354 | Display for process transmitter A transmitter for use in a process control system for monitoring an industrial process includes a housing having a top and a bottom and a height extending therebetween. A parallelogram display is mounted to the housing. Sides of the parallelogram display are arrange... | 11/14/2006 |
| 7120218 | Method for calibrating steam generator water level measurement A method is provided for determining and controlling feed water level in a steam generator of a nuclear power plant, whereby the water level sensor is calibrated in terms of the pressure drop across structural components in the feed water path. The water level diffe... | 10/10/2006 |
| 7109883 | Low power physical layer for a bus in an industrial transmitter A process variable transmitter connects a serial bus to an accessory load. A supply limiter circuit provides a first supply current limit and provides a stored energy output. A recessive driver circuit draws a drive current from the stored energy output and couples ... | 09/19/2006 |
| 7095330 | Disposable liquid level sensor having a virtual ring A liquid level sensor for standard bottles containing highly viscous materials such as gels so that the bottles may be inserted into an appliance to alert a user when the bottle is empty. The holder conveniently locates the bottle in the holder which includes insert... | 08/22/2006 |
| 7075443 | Wastewater fluid level sensing and control system A wastewater fluid level sensing and control system is provided. The system comprises a control panel, a reservoir, at least one pump and a fluid level sensing device. The control panel comprises a housing and user interface input and output devices for use with con... | 07/11/2006 |
| 7036381 | High temperature pressure transmitter assembly A pressure transmitter assembly for measuring a pressure of a process fluid includes an isolation diaphragm assembly. A pressure sensor is spaced apart from the isolation diaphragm assembly to provide thermal isolation. A conduit extends from the isolation diaphragm... | 05/02/2006 |
| 7036370 | Spring assembly with cantilevered spring rods A spring assembly and an apparatus incorporating the same. The spring assembly includes a base block configured to be rigidly fixed to a frame. A pair of nominally identical spring rods is cantilevered from the base block in a first direction. Each rod has a length,... | 05/02/2006 |
| 7032434 | Water leakage detecting device in dishwasher A water leakage detecting device for effectively detecting water leakage and sensing malfunctions in the device is disclosed. The device includes a base retaining water leaked from a tub, a detector detecting whether leaked water is retained in the base, a first sig... | 04/25/2006 |
| 7032449 | Measurement of fluid properties in vessel and sensor for same A sensor for measuring properties of a fluid in a vessel, includes a sensor mount adapted to mount within a wall of a vessel; a sensor body extending substantially vertically from the sensor mount; and a plurality of sensors spaced vertically along the sensor body, ... | 04/25/2006 |
| 7021137 | Apparatus for rapidly measuring liquid levels and volume of groundwater within wells that eliminates cross contamination between wells A dedicated liquid level detection method having a sensor positioned into the casing of a groundwater well. The detector is in the form of an elongated thin film sensor tape that extends along the full length of the well casing which detects the level, thickness and... | 04/04/2006 |
| 7004033 | Pressure sensor contained in casing A pressure sensor for detecting, e.g., an intake manifold pressure of an internal combustion engine is composed of a resin casing, a sensing member contained in the casing and conductor members embedded in the resin casing. The conductor members are disposed around ... | 02/28/2006 |
| 7004023 | Method and a system for level measurement of a liquid in containers The present invention is concerned with a method and a system for hydrostatic level readings of liquids in a container comprising the steps of providing a pressure sensor capable of determining a pressure value in a suction pipe, correlating said result to a predete... | 02/28/2006 |
| 7000468 | Electronic level gauge Disclosed is a fluid level gauge for sensing the level of fluid in a dispenser. The level gauge includes an inlet port communicating with the fluid and a check valve in communication with the inlet port. The check valve includes a membrane which allows air to pass. ... | 02/21/2006 |
| 6980914 | Method for determining a corrected weight of a batch tank The present invention relates generally to weight measurement methods and systems, and more specifically, to weight measurement methods and systems for material in a dynamic vacuum material transfer or other system utilizing differential conveying fluid pressure. Th... | 12/27/2005 |
| 6962085 | Pressure detector having elongate housing containing pressure-sensitive element therein A pressure detector such as a combustion pressure sensor includes a pressure-sensitive element disposed in a cylindrical housing. Electrical signals responsive to pressure applied to the pressure-responsive element are generated in the element and led to output term... | 11/08/2005 |
| 6957576 | Subterranean well pressure and temperature measurement A well pressure and temperature measurement system and method are provided. In a described embodiment, a sensor system includes multiple strain sensors attached to a structure which changes dimensionally in response to well pressure and temperature changes. The stra... | 10/25/2005 |
| 6945117 | Gasket having a fiber-optic pressure sensor assembly A sensor assembly includes a stainless steel tubular housing. Within the housing is a polyetheretherketone tube and a sensor. An optical fiber joins the sensor to a transmission cable and is fixedly positioned within the tube. A first end of the housing includes a p... | 09/20/2005 |
| 6938635 | Level switch with verification capability The present invention comprises a novel level switch which may be employed to detect liquid levels within a process vessel. The level switch of the present invention is self validating so that manual testing is not required in order to ensure proper operation and sw... | 09/06/2005 |
| 6931925 | Method for determining the current filling level of a liquid in a container The invention relates to a method for determining the current filling level of a liquid, preferably a calibrating, quality control, or cleaning fluid, or waste water, in a container, for example of an analyzer, where an immersion pipe is dipped into the liquid in th... | 08/23/2005 |
| 6928862 | Method of monitoring dual-phase liquid and interface levels A dual-phase level monitoring (DPLM) instrument that provides continuous signals that enables determination of the location of the top surface of the lighter of two immiscible fluids (the product) and the hydrostatic pressure below the total fluid column of both imm... | 08/16/2005 |
| 6907780 | Fuel level sensor According to an exemplary embodiment, the present technique relates to a fuel sensor for determining operational fuel level (hnew) in a fuel tank (14). In the exemplary embodiment, an isolated airspace (44) is created. By monitoring the pres... | 06/21/2005 |
| 6889669 | System and method of managing pressure in a fuel system A system and method of managing fuel vapor pressure in a fuel system. The direction of air flow between first and second ports on either side of a chamber is controlled by a liquid that divides the chamber into first and second portions. A leak detection test, exces... | 05/10/2005 |
| 6829928 | Method of accurately gauging groundwater and nonaqueous phase liquid contaminants which eliminates cross contamination between wells A dedicated liquid level detection method having a sensor positioned into the casing of a groundwater well. The detector is in the form of an elongated thin film sensor tape that extends along the fill length of the well casing which detects the level, thickness and... | 12/14/2004 |
| 6799457 | Bubble level meter and related method The invention concerns bubble level meter having a pneumatic tube connected to a gas generator and to a pressure sensor. A deflecting valve is interposed along the pneumatic tube, for deflecting the air outlet at a predetermined height from the usual lower outlet of... | 10/05/2004 |
| 6745626 | Liquid detecting piezoelectric device, liquid container and mounting module member A liquid detection device attached on a liquid container for detecting a liquid consumption status of the liquid contained in the liquid container, the liquid detection device including a vibrating section symmetrical about a center thereof, and at least one electro... | 06/08/2004 |
| 6606905 | Liquid level and weight sensor A liquid level and weight sensor utilizes a pressure sensor of any type positioned at the base of the liquid or weight. A second pressure sensor is positioned external to the liquid or weight to measure the ambient pressure. Ambient pressure is subtracted... | 08/19/2003 |
| 6595051 | Fluid level sensing and control system An improved pressure activated control apparatus is provided for sensing fluid pressure and triggering one or more switches in response to the fluid pressure, as desired. The apparatus is designed to be placed within a fluid of a reservoir. The apparatus ... | 07/22/2003 |
| 6553830 | Fluid measuring device measuring fluid level in a container at high temperatures and/or high pressures and/or in a chemically aggressive environment using microwaves The invention concerns a microwave level measuring device for measuring of material levels in containers, suitable for operation at extreme container conditions, comprising high temperatures, high pressures, and/or chemically aggressive substances.... | 04/29/2003 |
| 6490919 | Well water level measurement and display apparatus A well water level sensing apparatus using a pressurized air column in contact with the water at its distal end to derive a correlated value dependent upon the length of the air column which is converted for retrieving stored water levels from memory and ... | 12/10/2002 |
