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| Number | Title | Issue Date |
| 8375768 | Ionic liquid thin layer sensor for electrochemical and/or piezoelectric measurements An electrochemical piezoelectric sensor is disclosed. The sensor includes a piezoelectric substrate, three (or more) electrodes over a first surface of the substrate, and another electrode over a second (opposing) surface of the substrate. An ionic liquid in the for... | 02/19/2013 |
| 8365576 | Method for detecting low concentration gas Disclosed is a method for detecting a low concentration gas. In the method, a measurand gas containing the target gas in a concentration of 50 ppm or less is supplied to an oscillation element which contains a quartz crystal resonator and a zeolite including a metal... | 02/05/2013 |
| 8336367 | Detection sensor, vibrator An object of the present invention is to provide a detection sensor and a vibrator which can offer improved sensitivity. The present invention uses a scheme in which no piezoelectric layer, drive electrode, or the like is provided on the surface of a vibrator 30 | 12/25/2012 |
| 8210027 | Resonator device for detecting helium A device for detecting helium in ambient atmosphere includes a resonator and a frequency detector. The resonator includes a piezoelectric film layer configured to absorb helium atoms. The frequency detector configured to detect a change in resonant frequency of the ... | 07/03/2012 |
| 8196451 | Detection sensor There is provided a technique that can increase sensitivity of a resonator. A ratio Rb/Ra between an inner diameter Rb and an outer diameter Ra of the resonator 20 is appropriately selected, and thus there may be a fixed point where an r component (U(Ra) or U... | 06/12/2012 |
| 7913541 | Matrix nanocomposite containing aminocarbon nanotubes for carbon dioxide sensor detection The design and synthesis of a matrix nanocomposite containing amino carbon nanotubes used as a functionalized sensing layer for carbon dioxide detection by means acoustic wave sensing devices, e.g., SAW/BAW devices. These sensing materials contain a type of amino ca... | 03/29/2011 |
| 7886577 | Devices with surface bound ionic liquids and method of use thereof An ionic liquid bound on an exposed surface of a device such as for detecting organic chemicals, preferably a gas sensor is described. The gas sensor can operate at high temperatures with a fast linear response which is also reversible. At high temperatures, the fre... | 02/15/2011 |
| 7878044 | Sensor, system, and method, for measuring fluid properties using multi-mode quasi-shear-horizontal resonator A system and a method for providing information on two of the three variables, density (ρ), viscosity (η), and elastic modulus (c) of a fluid, such that independent knowledge of one variable allows the remaining two variables to be measured by a single sensor. The... | 02/01/2011 |
| 7805981 | Gaseous nuclear symmetric state and quantification thereof This invention relates to methods and apparatus of quantifying the portion of a gas in a specific nuclear symmetric state. Specifically, the invention is directed to the measurement of the speed of sound in an unknown sample and comparing it to astandard. ... | 10/05/2010 |
| 7681433 | Detection sensor and resonator By using a disc type resonator, a sensor detects a substance having a mass and the mass with high sensitivity. Moreover, it is preferable to detect a change in vibrations of a substance attached or adsorbed to an area having a vibration amplitude equal to or larger ... | 03/23/2010 |
| 7634937 | Systems and methods for monitoring solids using mechanical resonator Particle and multi-phase system monitoring methods, systems and apparatus are disclosed. Preferred embodiments comprise one or more mechanical resonator sensing elements. In preferred embodiments a sensor or a sensor subassembly is ported to a fluidized bed vessel s... | 12/22/2009 |
| 7568377 | High frequency thickness shear mode acoustic wave sensor for gas and organic vapor detection A thickness shear mode (TSM) sensor having a visco-elastic polymer coating and a fundamental frequency greater than 20 MHz useful for organic vapor or gas detection. The TSM quartz resonators at a fundamental frequency of 96 MHz were evaluated for their performance ... | 08/04/2009 |
| 7562557 | Flexural resonator sensing device and method A flexural resonator includes a piezoelectric material. At least a portion of an electrode having a first surface and a second surface is embedded in the piezoelectric material such that the piezoelectric material is disposed over and in electronic association with ... | 07/21/2009 |
| 7500379 | Acoustic wave array chemical and biological sensor An acoustic wave sensor array device is provided for the detection, identification, and quantification of chemicals and biological elements dispersed in fluids. The sensor array device is capable of the simultaneous characterization of a fluid for multiple analytes ... | 03/10/2009 |
| 7437907 | Sensor for detecting substance in liquid and apparatus for detecting substance in liquid using the same In a sensor for detecting a substance in liquid, recesses are provided in the upper surface of a base substrate. The recesses respectively accommodate SAW elements. A resin layer having openings is arranged such that the sensing portions at the upper surfaces of the... | 10/21/2008 |
| 7409851 | Detection of small bound mass Prefabricated catalyzing adsorption sites are incorporated into small oscillators. In one embodiment, the sites are formed of precisely positioned gold anchors on surface micromachined oscillators. The micromachined oscillators may be formed of silicon, such as poly... | 08/12/2008 |
| 7403113 | GaN-based sensor nodes for in situ detection of gases A system for detecting chemical/biological substances and a detection method. The system comprises a plurality of sensing units or nodes and a radiofrequency link. Each unit has several sensors with different sensing curves. Each sensor is able to transmit informati... | 07/22/2008 |
| 7398671 | Micromechanical sensor element A micromechanical sensor element for recording the bonding of molecules to the micromechanical sensor element. The sensor element having a substrate and at least one electrical terminal. There is also an oscillatable element that is coupled to the electrical termina... | 07/15/2008 |
| 7398163 | Sensing apparatus An object of the present invention is to provide a sensing instrument capable to detect a substance existing in a very small quantity, such as environmental pollutants, instantly with a high degree of precision. As a specific means for solving the problem, a frequen... | 07/08/2008 |
| 7389673 | Sensor for detecting analyte in liquid and device for detecting analyte in liquid using the same A sensor for detecting an analyte in liquid includes a base substrate provided with openings and electrode lands on one surface thereof and SAW elements each provided with a sensing portion having at least one IDT electrode on one side. The SAW elements are mounted ... | 06/24/2008 |
| 7368859 | Piezoelectric thin-film resonator and filter having the same A piezoelectric thin-film resonator includes a lower electrode provided on a substrate, a piezoelectric thin film provided on the lower electrode, and an upper electrode provided on the piezoelectric thin film. A membrane region is defined by a region where the uppe... | 05/06/2008 |
| 7360397 | Detector with condenser An ambient condition detector has a housing that carries a sensor of an airborne constituent such as a gas, and a condenser for minimizing an inflow of moisture into the sensor. A filter can be used to reduce fluid flow velocity prior to passing through or by the co... | 04/22/2008 |
| 7362033 | Surface-acoustic-wave device A surface-acoustic-wave device includes a piezoelectric substrate and first and second comb-shaped electrodes each having a bus-bar portion parallel to a propagation direction of a surface acoustic wave in the substrate. Respective electrode fingers are periodically... | 04/22/2008 |
| 7353695 | Methods and apparatus for determining properties of a fluid A method and system for determining properties of a fluid involves interacting the fluid with a standing wave in a first state to establish the standing wave in a second state, analyzing an electric signal associated with the standing wave to determine a characteris... | 04/08/2008 |
| 7356420 | Analyzing system for the detection of reducing and oxidizing gases in a carrier gas with a metal-oxide-semiconductor sensor arrangement Analyzing system for the detection of reducing and oxidizing gases in a carrier gas, wherein the detection means are sensors based on semiconductor-type metal oxides that work in the absence of oxygen. The system includes means for connecting to a chamber which cont... | 04/08/2008 |
| 7350403 | Method and apparatus for determination of food quality and authenticity A method for analysis of a multi-component fluid is provided based on the features of the dynamics of the self-organization processes in drying drops. An electro-acoustic resonator is utilized, with a drop of multi-component fluid placed on one end of the resonator.... | 04/01/2008 |
| 7350402 | Method and apparatus for determination of medical diagnostics utilizing biological fluids A method for measuring changes in the composition of fluids, for medical diagnostics or quality control of fluids, comprising: One) placing a drop of fluid upon a quartz crystal; Two) generating ultrasonic vibratio... | 04/01/2008 |
| 7350416 | Method for determining properties of a film, and apparatus for realizing the method A method for determining properties or a thin film includes the steps of: providing a piezoelectric substrate; providing a slanted finger interdigital transducer unit that includes a transmitter port and a receiver port on the piezoelectric substrate; forming the th... | 04/01/2008 |
| 7340941 | Dense thin film-based chemical sensors and methods for making and using same Sensors for determining the ambient amount (e.g., concentration) of a chemical (e.g., molecular hydrogen in a gas or vapor) are disclosed. Preferred embodiments of these sensors comprise a dense thin metal (e.g., palladium or a palladium alloy) film disposed on a mi... | 03/11/2008 |
| 7334452 | Method for characterizing materials by using a mechanical resonator Methods for monitoring a fluid composition include placing a mechanical resonator in the fluid composition and oscillating the resonator. The resonator can be a tuning fork resonator having tines oscillated in opposite directions and in opposite phases. A variable f... | 02/26/2008 |
| 7331231 | Apparatus and method for measuring micro mass using oscillation circuit A micro mass measuring apparatus includes a cantilever on which a subject is attached, a piezoelectric element formed on the cantilever, an oscillation circuit for actively vibrating the cantilever and providing a varied resonance frequency by the subject, and a fre... | 02/19/2008 |
| 7327068 | Sensors and related devices and methods Sensors that include SAW devices, related methods, and related devices. Many embodiments are included. Some of the present sensors include an inlet structure; a mounting structure that is spaced apart from the inlet structure, the mounting structure having a top sur... | 02/05/2008 |
| 7322243 | Acoustic wave etch rate sensor system An acoustic wave sensor system for monitoring the etch rate or etch ability of a selective material has an acoustic wave sensing device having a piezoelectric substrate and at least one electrode coupled to the substrate for generating a propagating acoustic wave an... | 01/29/2008 |
| 7319411 | Network of sensor nodes assemblies and method of remote sensing within liquid environments A network of remote sensing node assemblies, a first and second of which each has a sensor element, as well as associated technique and program code for transmitting information collected about a liquid environment. The network provides the capability of sensing the... | 01/15/2008 |
| 7317989 | Method and apparatus for chemometric estimations of fluid density, viscosity, dielectric constant, and resistivity from mechanical resonator data The present invention provides a chemometric equation to estimate fluid density, viscosity, dielectric constant and resistivity for a formation fluid sample downhole. The chemometric estimates can be used directly as estimated values for fluid density, viscosity, di... | 01/08/2008 |
| 7313945 | Cantilevers for sensing fluid properties A system for sensing a property of a fluid comprises a fluid channel operable to receive the fluid therein, a flexible arm having a free end positioned within at least a portion of the fluid channel, a fluid actuator disposed sufficiently close to the flexible arm s... | 01/01/2008 |
| 7311812 | Biosensor A biosensor for determining the concentration of an analyte in a biological sample. The biosensor comprises a support, a reference electrode or a counter electrode or both a reference and a counter electrode disposed on the support, a working electrode disposed on t... | 12/25/2007 |
| 7302829 | Contactless humidity/chemical vapor sensor device and associated method of fabrication The invention provides a contactless sensor device operable for sensing water vapor or a predetermined chemical vapor including a thin film, wherein the thin film includes a nanostructured sensing layer and a soft magnetic layer disposed directly adjacent to the nan... | 12/04/2007 |
| 7302830 | Flow detectors having mechanical oscillators, and use thereof in flow characterization systems An improved system, device and method for characterizing a fluid sample that includes injecting a fluid sample into a mobile phase of a flow characterization system, and detecting a property of the fluid sample or of a component thereof with a flow detector comprisi... | 12/04/2007 |
| 7302864 | Torque sensor A plurality of acoustic wave sensing devices can be provided, which are mechanically simulated for implementation upon a quartz wafer substrate. The quartz wafer substrate is appropriately etched to produce a quartz diaphragm from the quartz wafer substrate. A plura... | 12/04/2007 |
