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| Number | Title | Issue Date |
| 7403862 | Method for operating a process-measuring device The process measuring device comprises a flow sensor having a measuring tube, a sensor arrangement for producing a measurement signal, and an evaluation and operating circuit. The method serves to compensate for the effects of interfering potentials which are caused... | 07/22/2008 |
| 7369949 | Electromagnetic flowmeter An electromagnetic flowmeter includes a measuring tube, an electrode, an exciting unit, a signal conversion unit, and a flow rate calculating unit. The signal conversion unit extracts a ∂A/∂t component irrelevant to a flow velocity of the fluid and a v×B compon... | 05/06/2008 |
| 7328112 | Method for operating a magneto-inductive flow meter A method of operating a magneto-inductive flow meter in which the damping constant for processing of measurement signal values is automatically increased during a cleaning procedure, in order that, during the cleaning procedure, the amount of the used cleaning mediu... | 02/05/2008 |
| 7310582 | Electromagnetic flow meter with reduced power consumption and reduced exciting current An electromagnetic flow meter of a switching control system in which a DC voltage is applied to an exciting coil via switching elements, a direction of an exciting current flowing through the exciting coil is switched over at a predetermined excitation timing, and t... | 12/18/2007 |
| 7293468 | Electromagnetic flowmeter In order to attain a desired magnetic flux density, a parallel configuration of N divided magnetic circuits is formed, and accommodated on one pair of plate cores as N groups of exciting coils. According to the configuration, the burden of the magnetic coercive forc... | 11/13/2007 |
| 7162921 | Measuring device for measuring the volume flow or the substance properties of a gas, whose direction of flow can reverse A device for measuring the volume flow or other substance properties of a gas, whose direction of flow can reverse. The arrangement contains a specially designed Y-piece, which is used for branching into direction-dependent flow paths and can be used at the same tim... | 01/16/2007 |
| 7137307 | Magnetic-inductive measuring device for flowing substances and method for its production The invention relates to a magnetic-inductive measuring device for flowing substances with at least one subsystem respectively for carrying the substances, recording measuring signals through a signal pickup, generating a magnetic field through at least two exciting... | 11/21/2006 |
| 7117749 | Electromagnetic flow meter for low conductivity fluids An electromagnetic flow meter is disclosed which can be used to measure flow in low conductivity fluids, for example alcohol, turpentine, oil or other organic solvents. In one embodiment, the electromagnetic flow meter includes an elongate flow conduit having a dire... | 10/10/2006 |
| 7079958 | Method for operating a process-measuring device The process measuring device includes a flow sensor having a measuring tube, a sensor arrangement for producing a measurement signal, and an evaluation and operating circuit. The method serves to compensate for the effects of interfering potentials which are caused ... | 07/18/2006 |
| 7047821 | Magnetoinductive flowmeter and method for producing a measuring tube for a magnetoinductive flowmeter A magnetoinductive flowmeter encompasses a ceramic measuring tube as a conduit for a medium whose flow rate is to be measured, and a measuring electrode featuring a cermet body. The measuring tube is mounted in the wall of the measuring tube with its side that faces... | 05/23/2006 |
| 7000466 | Oil flow sensing An electrical current is passed through a thermistor to raise its temperature above the temperature of oil flowing in pulses past the thermistor. A change is measured in the temperature of the thermistor occurring with respect to one or more of the pulses. A level o... | 02/21/2006 |
| 6973840 | Comprehensive electromagnetic flowmeter An electromagnetic flowmeter works with insulating liquids, and includes circuitry for handle drifting zero-point offset and triboelectric noise occurring in turbulently flowing dielectrics. Two signal processing schemes are presented—using high frequency inductio... | 12/13/2005 |
| 6973839 | Electromagnetic flow meter having processing means resolving output data into a non-flow waveform component A method of obtaining a measure of flow from an electromagnetic flow meter is disclosed. A shaped excitation waveform is applied to the flow meter and an output is received from the meter. The sampled output data from the meter is then resolved into a non-flow wavef... | 12/13/2005 |
| 6962087 | Electromagnetic flow meter There is described herein a method of obtaining a measure of flow from an electromagnetic flow meter having at least one field generating coil and potential sensing electrodes. A composite excitation waveform is applied to the field-generating coil. The composite ex... | 11/08/2005 |
| 6789420 | Oil flow sensing An electrical current is passed through a thermistor to raise its temperature above the temperature of oil flowing in pulses past the thermistor. A change is measured in the temperature of the thermistor occurring with respect to one or more of the pulses. A level o... | 09/14/2004 |
| 6269701 | Electromagnetic flowmeter deriving power from signalling loop current An improvement over conventional electromagnetic flowmeters which signal a measure of flow rate by controlling the current in a current signalling loop (also known as a sensing loop) and in which power for the flowmeter is derived from the current in the ... | 08/07/2001 |
| 6256590 | Electromagnetic flowmeter In an electromagnetic flowmeter, the conventional derivation of flow velocity is corrected or replaced by an alternative calculation to take into account estimated non-linear dependence of field strength produced by the coil with applied coil current. Thi... | 07/03/2001 |
| 5866823 | Commutating electrode magnetic flowmeter A flowmeter for measuring the velocity of a fluid employs a circuit for producing a magnetic field transverse to the direction of fluid velocity, thereby inducing a voltage potential in the fluid. At least two electrodes, in electrical contact with the fl... | 02/02/1999 |
| 5844143 | Electromagnetic flowmeter An electromagnetic flowmeter for measuring a flow rate of a fluid which flows through a measuring pipeline arranged in a controlled magnetic field. The electromagnetic flowmeter includes an electromagnet unit excited by an exciting current, for generating... | 12/01/1998 |
| 5677496 | Electromagnetic flow meter removing influence of fluctuation in direct-current offset voltage An electromagnetic flow meter which calculates the electric conductivity of a fluid based on the ratio of an output signal generated when electrodes are grounded through short-circuit resistors Rs1, Rs2 to an output signal generated ... | 10/14/1997 |
| 5646353 | Electromagnetic flowmeter for measuring non-newtonian fluids To measure the average velocity vm and the flow index N of an electrically conductive non-Newtonian fluid flowing through a measuring tube (11) whose portion coming into contact with the fluid is electrically nonconductive, this electromagnetic... | 07/08/1997 |
| 5639970 | Current selection circuitry for magnetic flowmeter A magnetic flowmeter system provides a volumetric flow rate output and includes flowmeter electronics for coupling to a flowtube assembly. The flowtube assembly includes a coil which receives a magnetic field producing coil current from a supply circuit i... | 06/17/1997 |
| 5625155 | Electromagnetic flowmeter An electromagnetic flow meter capable of measuring the flow of a fluid flowing through a conduit irrespective of whether the conduit is full of the fluid. A ratio of the output of a sensor disposed on the side of the conduit and obtained when a coil dispo... | 04/29/1997 |
| 5621177 | Electromagnetic flowmeter An electromagnetic flowmeter for converting flow rate of a fluid to be measured into an electrical signal and for outputting a flow rate signal corresponding to the flow rate using detecting electrodes, comprising exciting means for applying a magnetic fi... | 04/15/1997 |
| 5551306 | Magnetic flowmeter A flowmeter for measuring the velocity of a fluid produces magnetic field transverse to the direction of fluid velocity thereby inducing a voltage potential in the fluid. The magnetic field may be produced using either electromagnets or permanent magnets.... | 09/03/1996 |
| 5544532 | Magnetic flowmeter with improved accuracy A monolithic flowtube for use with an electromagnetic flowmeter includes an inner portion formed of an improved purity dielectric material having a reduced number of mobile ions, a pair of electrodes adjacent the exterior surface of the inner portion and ... | 08/13/1996 |
| 5524493 | Electromagnetic flowmeter An electromagnetic flow meter capable of measuring the flow of a fluid flowing through a conduit irrespective of whether the conduit is full with the fluid or not. A ratio of the output of a sensor disposed on the side of the conduit and obtained when a c... | 06/11/1996 |
| 5499543 | Device for measuring the flow of fluid through a measuring pipe A device for measuring the flow of a fluid through a measuring pipe, includes a first coil arranged above the measuring pipe, a second coil arranged below the measuring pipe, and a pair of electrodes facing one another, on the sides of said measuring pipe... | 03/19/1996 |
| 5493914 | Device for measuring the flow of a fluid flowing through a measuring pipe A device for measuring the flow of a fluid flowing through a measuring pipe includes coils arranged above and below the measuring pipe and a pair of electrodes facing each other on the sides of the measuring pipe. The coils are excitable for producing aid... | 02/27/1996 |
| 5487310 | Electromagnetic flowmeter An electromagnetic flowmeter of this invention includes a measurement tube for passing a fluid to be measured, alternating magnetic field application means for applying alternating magnetic field and periodically switching magnetic fields applied in a fir... | 01/30/1996 |
| 5469746 | Electromagnetic flow meter An electromagnetic flow meter for industries includes a transducer and a signal processor provided separately from the transducer. The transducer having an exciting circuit, an amplifying and calculating part and a transmitting part outputs an analog flow... | 11/28/1995 |
| 5390548 | Electrode array electromagnetic velocimeter A velocimeter for measuring the velocity field characteristics of a conduve fluid moving over a surface is provided. A magnet has a central axis that is aligned with a direction of fluid movement of interest such that a plurality of magnetic flux lines e... | 02/21/1995 |
| 5388465 | Electromagnetic flowmeter In an electromagnetic flowmeter for obtaining a signal corresponding to flow rate of conductive fluid in a magnetic field, a noise detector detects a noise superimposed on the fluid, and a timing signal generator produces timing of generating an exciting ... | 02/14/1995 |
| 5375475 | Device to measure the flowrate in a partially full line Device to measure the flowrate of a fluid flowing in a partially full line, such as a canal or open channel, with coils arranged above and below the partially full line to generate a magnetic field extending essentially vertically through the partially fu... | 12/27/1994 |
| 5372045 | Bridge pulse controlled constant current driver for magnetic flowmeter A magnetic flowmeter system provides a volumetric flow rate output and has a coil receiving a magnetic field producing coil current from the current supply circuitry. The current supply circuitry includes an H-bridge transistor circuit having first and se... | 12/13/1994 |
| 5369999 | Non-full state detecting apparatus and method A non-full state detecting apparatus comprises an upper excitation coil disposed above the conduit, a lower excitation coil disposed below the conduit, a sensor provided on the side of the conduit for producing an output corresponding to the fluid when ea... | 12/06/1994 |
| 5351554 | Magnetoinductive flowmeter To provide highly accurate analog-to-digital conversion which is independent of coil-current fluctuations, this magnetoinductive flowmeter is equipped with a pipe made either of nonferromagnetic metal and insulated inside or of electrically non-conductive... | 10/04/1994 |
| 5325724 | Apparatus for measuring the flowrate of a fluid A device to measure the flowrate of a fluid containing electrical charges which flows in a pipe section. The device includes at least one electromagnet connected to a current source which generates a magnetic field through the pipe section and at least tw... | 07/05/1994 |
| 5307688 | Method and flowmeter for unsteady fluid flow study An electromagnetic flowmeter and a method for measurement of the rate of flow of a fluid under unsteady conditions are described. It uses fluid steady-state flowmeter technology and a new algorithm to measure transient rate of flow of a fluid such as wate... | 05/03/1994 |
| 5301556 | Flow measuring apparatus A liquid flow measuring system which, by means of a suitable timing sequence, is able to detect unbalanced voltage generation which occurs when the tube element through which the liquid is flowing is not completely full and, by means of a correction proce... | 04/12/1994 |
