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| Number | Title | Issue Date |
| 7770446 | Orthopedic simulator with temperature controller arrangement for controlling temperature of specimen baths An orthopedic simulator is provided with a temperature control arrangement for controlling the temperature of a plurality of baths of test stations that are configured to contain a sample under test within a specimen bath. The temperature control arrangement include... | 08/10/2010 |
| 7614297 | Multi-vortex flowmeter A flowmeter having a vortex type detection means with a measurement tube provided in a flow passage that allows passage of a fluid therethrough, and having a vortex generator provided in the measurement tube that is opposed to a flow of the fluid. The flowmeter also... | 11/10/2009 |
| 7399118 | Thermal gas flowmeter comprising a gas quality indicator The invention relates to a method and a device for measuring a gas consumption by means of a gas meter. A gas meter with thermal mass flow sensor for determining mass flow signals (SM) and with a calibration as energy meter for outputting energy value sig... | 07/15/2008 |
| 7360439 | Sample resistance measurement device In a circuit, as the bridge resistance of one side of a Wheatstone bridge circuit, a distortion gauge (fixed reference resistance) of which variation caused by environmental conditions is suppressed and a sample having a resistance component ΔR varied by the enviro... | 04/22/2008 |
| 7201033 | Flowmeter in-situ calibration verification system A calibration system includes a tube or other conduit, a gas source, and a computational device. The tube has an end positioned relative to a flow sensor, and is in communication with the gas source. The tube and gas source introduce calibration gas into the tube at... | 04/10/2007 |
| 7191645 | Dynamic mixed gas flowmeter A compensated flowmeter having a probe adapted to project into flowing media within a conduit. The probe includes a thermal dispersion sensor, and a compensating gas properties sensor contained within a no-flow chamber of the probe. The thermal flow sensor has activ... | 03/20/2007 |
| 7188519 | Device and method for measuring the flow and at least one material parameter of a fluid For measuring the flow and the thermal conductivity of a fluid, a sensor is used, which has a first temperature detector for measuring a first temperature and a second temperature detector for measuring a second temperature. A heating is arranged between the tempera... | 03/13/2007 |
| 7120542 | Flow monitoring system A flow monitoring system includes a first temperature-sensitive resistive device, thermally coupled to a first portion of a fluid transfer apparatus, for producing a first temperature-dependant voltage signal representative of the temperature of the fluid within the... | 10/10/2006 |
| 7096723 | Method and device for determining the throughput of a flowing medium Methods and/or devices for detecting the flow rate of a flowing medium, in particular the flow rate of a flowing air mass, are described, in which the flowing medium is detected with two evaluation methods that operate according to different principles and the two m... | 08/29/2006 |
| 7084778 | Ammonia flow alarm and method therefor A sensor system for monitoring cryogenic gas flow through a tube/pipe has at least one sensor coupled to the tube/piping. An alarm circuit is coupled to the sensor for receiving measurement signals from the at least one sensor and for sending an alarm signal when th... | 08/01/2006 |
| 7072776 | Method of regulating resistance in a discontinuous time hot-wire anemometer A system and method are provided to regulate resistance in a discontinuous time hot-wire anemometer. The solution removes supply voltage dependency on the mass airflow output signal. Operating the hot-wire anemometer using discontinuous time regulation offers lower ... | 07/04/2006 |
| 7069157 | Heat sensitive flow meter and fuel controller Provided is a heat sensitive flow meter for measuring a flow rate of a fluid passing through a flow passage provided in an internal combustion engine, including: a filter (7) (constituted of a fixed resister (3) and a capacitor (4)) for inputtin... | 06/27/2006 |
| 7059185 | System and method of measuring convection induced impedance gradients to determine liquid flow rates A method and system for measuring the flow rate of a liquid or gas within a flow channel utilizing a centrally located excitation source and a plurality of sensors. The excitation source is comprised of a heating element coupled with an alternating current generator... | 06/13/2006 |
| 7036982 | Method and apparatus to control an exhaust gas sensor to a predetermined termperature The invention provides a control strategy and a control system to control a gas sensor to a target operating temperature. It relies upon both feedback and model-based feedforward control systems to achieve and then maintain the sensor at the target operating tempera... | 05/02/2006 |
| 7032446 | Flowrate measuring device with improved flow introduction into sub-passage outlet There is provided a flow rate measuring device which comprises a means for introducing a backward flow of the main passage into the sub-passage through the outlet of the sub-passage of the flow rate measuring device is provided near the outlet of the sub-passage, in... | 04/25/2006 |
| 7003418 | Methods and systems for temperature compensation of physical property sensors Temperature compensation methods for physical property sensors are disclosed herein, based on a simple bridge circuit. An imbalance of the bridge circuit can be driven to a zero value, while a supply voltage thereof is simultaneously driven to a level required to br... | 02/21/2006 |
| 6973827 | Flow rate measuring method and flowmeter, flow rate measuring section package used for them and flow rate measuring unit using them, and piping leakage inspection device using flowmeter Measurements are obtained by a computing unit based on an output Vh from an indirectly-heated constant-temperature controlling flow rate measuring section (16) and an output Vout from a two-constant-point temperature difference detecting flow rate measuring s... | 12/13/2005 |
| 6962077 | System and method of measuring convection induced impedance gradients to determine liquid flow rates A method and system for measuring the flow rate of a liquid or gas within a flow channel utilizing a centrally located excitation source and a plurality of sensor means. Said excitation means is comprised of a heating element coupled with an alternating current gene... | 11/08/2005 |
| 6935572 | Temperature differential eliminator The present invention relates to a device and method for providing precise temperature control using inexpensive temperature controllers and/or thermostats. Specifically the invention provides modifications to either a temperature controller and/or a thermostat that... | 08/30/2005 |
| 6905242 | Sensor temperature control in a thermal anemometer A thermal anemometer that separates sensor heating from sensor temperature measurement through a switched sampling technique. This approach demonstrates several advantages over the more typical circuitry employing a bridge, which simultaneously heats the sensor and ... | 06/14/2005 |
| 6820480 | Device for measuring gas flow-rate particularly for burners A device for measuring the flow-rate of gas in a duct, particularly for burners. The device includes a gas flow-rate sensor generating a first output signal proportional to the flow-rate detected, a temperature-compensation circuit receiving the first output signal ... | 11/23/2004 |
| 6626037 | Thermal flow sensor having improved sensing range A flow sensor, which can detect flow velocity in a wide range including high flow velocity area with simple structure. A flow sensor includes a substrate having a hollow portion; and a thin film structure portion provided above the hollow portion. The thi... | 09/30/2003 |
| 6520009 | Air flow rate measuring apparatus An air flow rate measuring apparatus generates a flow rate signal with a nonlinear characteristic from a flow rate detecting unit provided with a heat generating resistor and converts that into a signal with a linear characteristic by a linearizing circui... | 02/18/2003 |
| 6422162 | Method and apparatus for flow control of NH3 The present invention provides an apparatus and method for accurately controlling the amount of NH3 to be applied to a field by measuring the NH3 flow rate without condensing or cooling the NH3. The system includes a contr... | 07/23/2002 |
| 6369712 | Response adjustable temperature sensor for transponder A response-adjustable temperature sensor (306, Rext), particularly for a transponder (102, 200, 400) capable of measuring one or more parameters (e.g., temperature, pressure) and transmitting a data stream (FIGS. 3C, 4B) to an external reader/interrogator... | 04/09/2002 |
| 6230559 | Thermal type flow measuring instrument and temperature-error correcting apparatus thereof In flow detection by a thermal-type flow measuring instrument, a flow rate valve with reduced measurement error due to temperature variation can be obtained even under environment where a fluid temperature and a circuit temperature are different. A measur... | 05/15/2001 |
| 5940784 | Heat flow meter instruments An apparatus, such as, a heat flow meter instrument, for measuring thermal properties of a specimen includes a first thermoelectric device and a second thermoelectric device, each device being thermally coupled to a hot plate and a cold plate, and a heat ... | 08/17/1999 |
| 5936156 | Liquid metering A meter to measure the volumetric flow rate of a liquid, for example water, is formed with a pipe forming a liquid flow path containing a low power electrical heater. A first temperature sensor measures the temperature T of the liquid adjacent to an upstr... | 08/10/1999 |
| 5894088 | Thermal flow meter with less turbulence in fluid flow A central member of a sensor unit is inserted through a sensor unit mounting hole of a cylindrical body having a main passage and the sensor unit is assembled on the cylindrical body. The sensor unit comprises the central member which is provided at the c... | 04/13/1999 |
| 5844135 | Temperature sensor for measuring a flow medium in a flow conduit of an internal combustion engine A temperature sensor for measuring and/or monitoring the temperature of a medium flowing in a flow conduit of an internal combustion engine. The sensor has a one-piece plastic body with a sensor and plug part, a resistor element, connecting plug tongues, ... | 12/01/1998 |
| 5804712 | Oil flow sensor An oil flow sensor and circuit to indicate the presence of oil flow in a multi-cylinder internal combustion engine. The oil sensor includes a heating element positioned within the oil line directly in the oil flow path. Positioned upstream and downstream ... | 09/08/1998 |
| 5783757 | Methods and apparatus for measuring a speed of flow of a fluid A method of and apparatus for measuring a fluid flow speed using a current controlled heat sensor. A first signal is extracted from the heat sensor for a first value of current. The value of the current flowing through the heat sensor is modified and, fro... | 07/21/1998 |
| 5780736 | Axial thermal mass flowmeter Thermal mass flowmeter comprising a conduit defining a flow path and an elongated thermal mass flow sensor. The thermal mass flow sensor is coupled to the conduit with the longitudinal axis of the thermal mass flow sensor being aligned substantially paral... | 07/14/1998 |
| 5764539 | Non-invasive system and method for a fluid flow monitoring system A non-invasive system and method is provided for a fluid delivery system of the type including a fluid delivery pump delivering fluid in pulses through a fluid delivery tube. The non-invasive monitoring system and method includes a sensor which is brought... | 06/09/1998 |
| 5656938 | Temperature compensation in mass flow sensors employing the hot-wire anemometer principle For determining the air mass flow in the intake pipe of an internal combustion engine by means of an electrical bridge, normally the current flowing through the current measurement resistor when balancing the bridge is evaluated as an indirect measure of ... | 08/12/1997 |
| 5608168 | Temperature compensation in a regulated heat conduction vacuum gauge The invention relates to a process for operating a regulated heat conduction vacuum gauge with a Wheatstone bridge (1) powered by a controllable supply voltage and a gauge filament (6) and a resistance (9) as two of its components among others, designed t... | 03/04/1997 |
| 5562101 | Portable spirometer with improved accuracy A spirometric measurement device includes an arrangement for computation of a dynamic BTPS correction factor, to compensate for temperature-related volume changes due to cooling of expired gas. The correction factor varies in time according to variation o... | 10/08/1996 |
| 5524084 | Method and apparatus for improved flow and pressure measurement and control In the preferred embodiment, the invention is embodied in the pneumatic manifold of a gas chromatograph to provide current operating temperature and pressure compensation of inlet fluid flow. The pneumatic manifold comprises a plurality of thermally coupl... | 06/04/1996 |
| 5493100 | Thermistor flow sensor and related method A fluid flow rate measuring apparatus having a thermistor exposed to a flow of fluid and a driver circuit operable in an initial constant-voltage mode, in which it applies a substantially constant voltage across the thermistor, and a subsequent constant-c... | 02/20/1996 |
| 5460040 | Thermosetting flowmeter An object of the present invention is to obtain a highly accurate thermosensitive flowmeter in which flow rate characteristic errors and temperature characteristic errors of a flow rate signal voltage are small. According to the present invention, flow ra... | 10/24/1995 |
