| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 073295000 | Thermal type | 26 |
| 20080314142 | FLUID LEVEL INDICATION SYSTEM AND TECHNIQUE - A technique that is usable with a well includes disposing a distributed temperature sensor in a conduit that traverses a region of the well. The region contains at least two different well fluid layers. The technique includes circulating a fluid through the conduit and using the distributed temperature sensor to observe at least one temperature versus depth profile of the fluid. Based on the observation, the depth of a boundary of at least one of the well fluid layers is determined. | 12-25-2008 |
| 20090056437 | Liquid Level Detecting Method and Liquid Level Detecting Device - A liquid level detecting method is provided for detecting the level of a liquid at a high accuracy by performing correction by using the density of the liquid, in the case of detecting the liquid level by using a pressure sensor. The pressure sensor ( | 03-05-2009 |
| 20090090178 | LIQUID STATE DETECTING SENSOR - A liquid state detecting sensor is provided in which a level detecting unit for detecting the level of a liquid and a concentration detecting unit for detecting the concentration of a particular component contained in the liquid are integrated. | 04-09-2009 |
| 20090199634 | Immersion Thermowell for Temperature and Water Level Sensing - An apparatus to allow for temperature measurement and simultaneous detection of fluid level is disclosed. An immersion thermowell with an electrically isolated sensor tube allows for ready conduction of heat energy to a temperature sensor probe. An electrical signal originating on the fluid container chassis is conducted into the water, which is then conducted to the electrically isolated thermowell tip and the signal is made available to control apparatus. | 08-13-2009 |
| 20090293608 | Apparatus for Measuring a Filling Level - An apparatus for measuring the filling level in a liquid vessel, in particular in a reactor vessel of a nuclear-engineering plant, with a plurality of elongate, spaced-apart measurement tubes. Each measurement tube has a number of thermocouples which are distributed in the longitudinal direction. A thermocouple, which acts as a primary signal transmitter, is heated by a heating element and is arranged on a first measurement tube, has assigned to it on the signal side an unheated thermocouple, which acts as a reference signal transmitter and is arranged on a measurement tube which is different from the first measurement tube. | 12-03-2009 |
| 20100000316 | System for Manufacturing a Modularly Structured Apparatus for Determining a Physical Process Quantity, and Standardized Components - A system for providing different versions of a modularly structured apparatus for determining a physical process quantity, wherein at least two devices to be generated from the system are based on different measuring principles, including a number sensor units ( | 01-07-2010 |
| 20100037689 | POSITIONING DEVICE FOR A ROD-SHAPED MEASURING APPARATUS - The present invention is based on the object of enhancing a known positioning device such that it also enables the use of rod-shaped measuring devices having a uniform length, even for measuring points located at varying depths of an object, such as an extrusion die. This object is achieved according to the invention in that a sleeve is provided, which is connected at an axial extension to the distal end of the cylindrical guide element from the object, and in which the spring element and the measuring apparatus are also guided, and that the second stop for the spring element can be axially displaced beyond the distal end of the cylindrical guide element from the object with the help of the sleeve, and fixed. | 02-18-2010 |
| 20100206067 | HYDRAULIC MONITORING UNIT - The present invention concerns a device ( | 08-19-2010 |
| 20100218600 | DEVICE AND METHOD FOR DETERMINING THE QUANTITY OF SUBSTANCE IN SMALL CAVITIES - The invention describes a method and a device for simultaneously determining the mass, volumes or types of substance samples in a plurality of small cavities ( | 09-02-2010 |
| 20110088465 | METHOD AND DEVICE FOR MONITORING THE FILL LEVEL OF A LIQUID IN A LIQUID CONTAINER - A method for monitoring the fill level of a liquid in a liquid container, in particular for monitoring the coolant fill level in a reactor pressure vessel of a pressurized water reactor system, wherein a determination is made about the drop in the liquid level below the installed height of a heated thermal element by way of the temperature difference measured between said heated thermal element and an unheated thermal element associated therewith, both of said elements being disposed in the liquid container, said method comprising the especially reliable triggering of an alarm with a short response time while maintaining a low level of physical and controls engineering complexity when the liquid level to be monitored falls below a critical value. To this end, according to the invention the temporal progression of the temperature difference is continuously monitored for any significant increase, in particular sudden increase, within a time interval of pre-determined duration prior to the respective evaluation time, wherein an alarm signal is issued as soon as the change in the temperature difference within said time interval reaches or exceeds a pre-determined limit value. | 04-21-2011 |
| 20110167905 | CASTING LEVEL MEASUREMENT IN A MOLD BY MEANS OF A FIBER OPTIC MEASURING METHOD - The invention provides a method for the cast level measurement in a mold by means of sensors for fiber optic temperature detection, which are disposed in the mold copper plate at the height of the casting level. The invention further comprises respective sensors. Fiber optic cables are disposed in said sensors, which allow simple, reliable and highly locally resolved temperature monitoring at the height of the casting level by means of a suitable temperature analysis system. By means of the temperatures determined by the sensors, a conclusion can be made as to the exact height of the casting level. Furthermore, the shape of the casting level shaft may be determined by means of which further parameters of the casting process become accessible. | 07-14-2011 |
| 20110271754 | Liquid Level Transducer with Heating Unit - A transducer for determining the liquid level within a container that is subjected to at least partial solidification at or below a freezing temperature is provided. The transducer includes a mounting head adapted for connection to the container, a liquid level sensor adapted for extending into the container from the mounting head; and a heating unit extending through the mounting head. The heating unit is constructed of at least one tubular member that surrounds or encircles the liquid level sensor. Heated fluid from a fluid source is circulated through the at least one tubular member for heating the contents of the tank at least within the vicinity of the liquid level sensor. A fluid withdrawal tube can also be in close proximity to the at least one tubular member so that the contents of the tank surrounding the heating unit can be removed even when the remaining tank contents are in a frozen state. | 11-10-2011 |
| 20120055246 | ACOUSTIC LIQUID MEASUREMENT - A device is disclosed for providing a temperature compensated measurement of the level of a liquid in a tank. The device includes a transducer for transmitting and receiving acoustic signals, a waveguide connected to the transducer and adapted to extend into the liquid, and at least one device for directing a flow of heat transfer fluid originating from a heat transfer system along the exterior of a portion of the waveguide which during operation is located above the liquid level. Further, a device is disclosed for controlling a heat regulating device adapted to regulate a temperature of a liquid in a tank, including a transducer for transmitting and receiving acoustic signals, a waveguide connected to the transducer, the waveguide having a reference portion located above the liquid surface, and a control device configured to measure the speed of sound in the reference portion as an indication of a temperature in the liquid, and control the heat regulating device based on the indicated temperature. | 03-08-2012 |
| 20120090392 | SEALING DEVICE FOR A DEVICE FOR MEASURING THE FILL LEVEL IN A FLUID CONTAINER - A sealing device for a device for measuring a fill level in a fluid container, particularly in a pressure container of a nuclear facility, includes at least one thermocouple which is connected by a pressure pipe to the pressure container and a pipeline connected to the pressure pipe to an evaluation unit. The pressure pipe and the pipeline are connected to each other by a pipe screw connection including a central part having two threaded pieces. One threaded piece is connected by a screw connection to a pipe sleeve and the other threaded piece is connected by a further screw connection to the pressure pipe. | 04-19-2012 |
| 20120096940 | Method and Apparatus for Detecting the Level of a Liquid in Monitoring a Dispense/Aspirate Process - A device and a method are used for measuring the filling level of a fluid for monitoring a dispense/aspirate process in reaction vessels, including at least one cavity for dispensing and aspirating the fluid, where the cavity is provided with a filling level sensor whose signals, transmitted to an evaluation unit, are evaluated to determine the filling level, the at least one cavity is assigned a receiving body which is closed at the bottom and is separated from the cavity for receiving the fluid, the filling level sensor is at least one thermistor extending along the outside of a wall of the receiving body without coming in contact with the fluid he the evaluation unit evaluates the temperature influence of the thermistor in dispensing, aspirating and in retention of the fluid in the receiving body to detect the filling level, in this way the process monitoring in washing the reaction vessels is improved. | 04-26-2012 |
| 20120174665 | Fill-Level Measuring Device - A fill-level measuring device with a membrane, which is placed in such a manner on one of the two end region of a tubular housing that it seals the housing on such end region. An oscillatable unit is placed on the side of the membrane facing away from the housing, with a driver/receiver unit, which is composed of a plurality of piezoelectric elements arranged in a stack. The driver/receiver unit is placed via a pressure screw unit in such a manner in the housing that it oscillates in the direction of the longitudinal axis of the housing between the membrane and the pressure screw unit. The driver/receiver unit excites the oscillatable unit via the membrane to execute oscillations, with a control/evaluation unit, which evaluates amplitude, frequency and/or phase of the oscillations of the oscillatable unit and with a temperature sensor for determining temperature of the medium. The temperature sensor is integrated in a fill-level measuring device element, which is in thermal contact with the medium via the membrane or the housing, wherein the element is so selected that the oscillatable unit oscillates unimpaired by the temperature sensor. | 07-12-2012 |
| 20120285239 | Apparatus for Determining at Least One Process Variable - An apparatus and method for determining at least one process variable of a medium in a container or in a pipeline. The apparatus including: at least a first element and a second element, which are necessary components of the apparatus for determining the process variable and which contact at a contact location, which is exposed to a process temperature. The first element comprises a first material, and the second element comprises a second material. The first material and the second material are selected and matched to one another in such a manner that at the contact location between the first material and the second material a thermovoltage dependent on the difference between the process temperature and a reference temperature arises; and a temperature determining unit measures the thermovoltage and determines the process temperature therefrom. | 11-15-2012 |
| 20140007675 | LIQUID LEVEL SENSOR SYSTEM - A liquid replenishment system includes a reservoir, a first temperature sensor positioned in the reservoir at a full level, a second temperature sensor positioned in the reservoir at an add level, and a controller. The controller is connected to both the first and second sensors. The controller receives temperature signals from the first and second temperature sensors at first and second times. The controller sends an add liquid signal if temperature sensed by the first temperature sensor is substantially different at the first and second times and if temperature sensed by the second temperature sensor is substantially different at the first and second times. The controller sends a full signal if temperature sensed by the first temperature sensor is substantially the same at the first and second times and if temperature sensed by the second temperature sensor is substantially the same at the first and second times. | 01-09-2014 |
| 20140137645 | FLUID LEVEL SENSOR SYSTEM AND METHOD - A fluid level sensor system includes a thermal path component disposed at least partially within a fluid containing volume, the thermal path component including a heat source operably coupled thereto and a control temperature sensor for sensing a control temperature of the thermal path component. Also included is a reference temperature sensor for sensing a reference ambient temperature. Further included is a controller in operable communication with the control temperature sensor, the heat source and the reference temperature sensor, wherein the controller maintains a predetermined temperature difference between the control temperature and the reference ambient temperature by controlling the heat source, wherein an energy level required to maintain the predetermined temperature difference is converted to a fluid level within the fluid containing volume. | 05-22-2014 |
| 20140230543 | TWO WIRE TEMPERATURE AND FLUID LEVEL LIMIT SWITCH - A two-wire system for monitoring fluid level and temperature including a pair of electrical interconnect wires bridged by a fluid level switch and a thermal sensing element. One of the fluid level switch or the thermal sensing element bypasses the other during a trigger event. | 08-21-2014 |
| 20140290357 | SYSTEM AND METHOD FOR IDENTIFYING LEVELS OR INTERFACES OF MEDIA IN A VESSEL - Systems and methods for identifying the level of media in a vessel with a sensing cable including an optical fiber sensor array aligned with a heating element disposed in the vessel. An excitation source is configured to propagate at least one heat pulse through the heating element along at least a portion of the sensing cable to affect an exchange of thermal energy between the heating element and the one or more media exposed to the sensing cable. An optical signal interrogator is adapted to receive a signal from each of a plurality of sensor locations and measure a temperature profile corresponding to the heat pulse at the sensor locations. A control unit is configured to identify a level of each of media by determining properties of the media exposed to the sensing cable at each of the sensor locations based on the temperature profile corresponding thereto. | 10-02-2014 |
| 20150040660 | LIQUID LEVEL SENSING APPARATUS AND METHOD - Provided is a apparatus for sensing a liquid level reliably based solely on an analog process even if a liquid held in a container boils, causing the liquid level to fall. A liquid level sensing apparatus includes: a probe selection unit configured to select a probe whose heater is to be activated from among the plurality of probes; an input unit configured to receive an output of the temperature sensor of the probe selected by the probe selection unit, the output being received as a temperature signal directly in the form of an analog quantity; a signal processing unit configured to output a processing signal of the temperature signal in synchronization with activation of the heater; a calculation unit configured to arithmetically process the temperature signal and the processing signal and output a result; a gas/liquid discrimination unit configured to discriminate whether the detecting point exists in a gas phase or a liquid phase based on the output result of the arithmetic processing; and a display unit configured to indicate a discrimination result produced by the gas/liquid discrimination unit. | 02-12-2015 |
| 20150052996 | Fillilng Level Sensor with Several Thermoelements and Method for Measuring the Filling Level - The aim is to achieve a particularly robust and reliable embodiment of a filling level sensor with several thermoelements for measuring the filling level of a liquid in a receptacle. This is achieved in that the thermoelements are arranged in parallel with one another and extend from the bottom upwards. The thermoelements are of different heights so that, depending on the filling level, one part of the thermoelements is flooded and another part is not. This can be used to derive information regarding the filling level. | 02-26-2015 |
| 20150059469 | METHOD AND APPARATUS FOR REMOTELY MONITORING LIQUID FOOD PRODUCTS - A device for monitoring the temperature and level of liquid food in a container is provided. The device includes an upper base and a lower elongate housing member. A plurality of temperature sensors are located along the length of the elongate housing member. The device may include a retaining lip which allows the device to be hung over the edge of a food container, with the elongate housing member extending down into the liquid food. Signals received from the individual sensors can be used to determine both the temperature of the liquid and the level or volume of the liquid in the container, using the known distances between the individual sensors. Information regarding the liquid temperature and level can then be transmitted from the monitoring device to an external receiver. The device may also comprise an energy harvesting device which converts heat energy from the liquid into electrical energy. | 03-05-2015 |
| 20150338260 | Hydrogen Generator with Fuel Gauge - The invention is a hydrogen generator with a fuel gauge and a method of fuel gauging. The hydrogen generator includes a replaceable fuel unit, containing a hydrogen-containing material (fuel) that can release hydrogen gas when heated and whose thermal conductivity is related to a quantity of releasable hydrogen contained therein, and a fuel gauge including a heat source and a temperature sensor adjacent to the fuel unit and a controller for determining a fuel level value based on a measured temperature. The temperature is measured at a pre-established time after activating the heat source, and the measured temperature is compared to a predetermined relationship between the measured temperature and a releasable hydrogen content in the fuel at the pre-established time. An output signal is provided (e.g., to a visible display, an audible signal or a controller). | 11-26-2015 |
| 20160069728 | Robust Dynamical Method and Device for Detecting the Level of a Liquid Using Resistance Temperature Detectors - A method for indicating the level of a liquefied gas in a cryogenic tank having a resistance temperature detector ( | 03-10-2016 |
