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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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7299678 |
Sensor apparatus
A measurement head particularly for borehole use can measure multiple parameters with no electronics in the head and only a single conductor cable. Double-ended tuning forks ( 26, 28 and 38, 40 )...
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7275437 |
Acoustical cell for material analysis
An acoustical cell for analysis of materials by measuring parameters of acoustical resonanace. The cell comprises a main frame and an electroacoustical transducer assembly. The main frame includes...
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7275436 |
Method and apparatus for measuring film thickness and film thickness growth
A device for measuring thickness and/or rate of thickness increase of a film comprises at least one piezoelectric element, and first and second electrodes in contact with the piezoelectric element....
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7275413 |
Methods, systems, circuits, and computer program products for determining polarization of a gas
A system for determining polarization of a gas comprises a container that contains the polarized gas. An oscillator circuit comprises an Nuclear Magnetic Resonance (NMR) coil that is positioned...
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7267009 |
Multiple-mode acoustic wave sensor
A multiple-mode acoustic wave sensor apparatus includes an acoustic wave device comprising a piezoelectric substrate and at least one electrode on the substrate. When such sensor is used in a...
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7266990 |
Flexural plate wave sensor and array
A method for manufacturing a flexural plate wave sensor includes the steps of depositing an etch-stop layer over a substrate, depositing a membrane layer over the etch stop layer, depositing a...
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7263871 |
System and method for gas analysis using doubly resonant photoacoustic spectroscopy
A method for analyzing gas concentration using doubly resonant photoacoustic spectroscopy, and a doubly resonant photaoacoustic gas detector comprising:
i) a continuous wave light beam whose...
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7232545 |
Sensor for determining concentration of fluid sterilant
A sensor for detecting hydrogen peroxide, comprising an element exhibiting piezoelectric properties having a metal-oxide-containing coating, the metal-oxide having a divalent or tetravalent state.
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7210332 |
Mechanical resonator
A sensor and methods for making and using the same in which a mechanical resonator is employed, comprising a resonator portion for resonating in a fluid without the substantial generation of...
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7201034 |
Gas concentration measurement instrument and gas concentration measurement method
A gas concentration measurement instrument comprises: ultrasonic wave transmitting means for transmitting an ultrasonic wave according to an ultrasonic wave generation signal composed of a group of...
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7194891 |
High-temperature gas sensors
A method of sensing the amount of a gas in a fluid flow includes operating an acoustic wave (AW) sensor at a first resonant frequency. The AW sensor includes a high temperature stable piezoelectric...
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7191639 |
On-chip magnetic force actuation of microcantilevers by coplanar coils
An on-chip coil is provided in a micromachined device for magnetic actuation of a nanoelectromechanical microcantilever. The novel geometry involves a three dimensional solenoid or planar coil...
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7191638 |
Device for determining and/or monitoring at least one physical parameter and having a piezo-drive for oscillation-excitation and -detection
A device for determining and/or monitoring at least one physical parameter of a medium, having at least one mechanically oscillatable unit and at least one drive-/receive unit. The drive-/receive...
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7178378 |
Resonant sensor and sensing system
The disclosed sensor chip includes a substrate and a moving member coupled to the substrate and disposed for movement relative to the substrate. The moving member moves relative to the substrate in...
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7168298 |
Mass-sensitive chemical preconcentrator
A microfabricated mass-sensitive chemical preconcentrator actively measures the mass of a sample on an acoustic microbalance during the collection process. The microbalance comprises a chemically...
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7146857 |
Real time analysis for gas mixtures
The invention is concerned with a method and apparatus for real time analysis of gas mixtures, e g determination of air quality, including at least one resonator ( 1, 11 ), means for gas...
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7143632 |
Gas detecting method, and gas detecting device
An electronic signal relating to a sonic wave when an intended gas does not exist in air is synchronized and locked in a feedback circuit constituting a phase-locked loop (PLL). Then, an electronic...
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7127934 |
Methods, systems, circuits, and computer program products for determining polarization of a gas
A system for determining polarization of a gas comprises a container that contains the polarized gas. An oscillator circuit comprises an NMR coil that is positioned adjacent to the container. A...
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7117743 |
Multiple-transducer sensor system and method with selective activation and isolation of individual transducers
A transducer-based sensor system, including a transducer array having a plurality of transducers, a selector coupled with the transducer array and an output processing subsystem. Defined between...
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7111495 |
Sensor based on surface components with capacitative coupling of the high frequency connections
In a sensor on the basis of surface wave components disposed in a housing with at least one surface wave component, a fluid channel and conductors for high frequency signals, the conductors are...
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7089781 |
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...
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7082810 |
Gas sensor
A gas sensor ( 10 ) including a measurement chamber ( 28 ) into which a gas GS is flown and a detection element main body ( 40 ) facing the measurement chamber ( 28 ). The detection element main...
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7080543 |
Sensor and method for manufacturing the same
A detecting-element assembly ( 40 ) is configured such that a piezoelectric element ( 51 ) is housed in a casing body portion ( 43 ) of a casing ( 42 ), and is attached to a housing portion ( 22 )...
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7073370 |
Method and apparatus for characterizing materials by using a mechanical resonator
A method and apparatus for measuring properties of a liquid composition includes a mechanical resonator, such as a cantilever, connected to a measurement circuit. The mechanical resonator can be...
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7047793 |
Sensitive substance and surface acoustic wave gas sensor using the same
A surface acoustic wave gas sensor for detecting predetermined substances includes a piezoelectric substrate, an input transducer and an output transducer which is formed on the piezoelectric...
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7047792 |
Surface acoustic wave hydrogen sensor
The present invention provides a delay line SAW device fabricated on a lithium niobate substrate and coated with a bilayer of nanocrystalline or other nanomaterials such as nanoparticles or...
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7036375 |
QCM sensor and QCM sensor device
A plurality of quartz crystal resonators having different resonance frequencies are connected in parallel. A combined admittance of the resonators is measured. Equivalent circuit constants of all...
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6997039 |
Carbon nanotube based resonant-circuit sensor
Disclosed are resonant gas sensors and methods for forming and using the disclosed sensors. The sensors include a resonator including a layer comprising adsorptive nanostructures, for example...
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6978656 |
Transducer-based sensor system and method
A system and method for performing rupture event scanning and other sensing operations on a sample. The method includes providing a transducer with an immobilized binding partner material and a...
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6964196 |
Resonant pivoting surface with inertially coupled activation
A system and method for providing resonant movement about a first axis. A functional surface supported by a first pair of torsional hinges is driven into resonant oscillations about the first axis...
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6957565 |
Method and apparatus for characterizing materials by using a mechanical resonator
A method for measuring properties of a fluid that includes oscillating a tuning fork resonator in a fluid. The invention is particularly suitable for in-line monitoring of various physical and...
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6945090 |
Method and apparatus for monitoring molecular contamination of critical surfaces using coated SAWS
A molecular contamination monitor for monitoring molecular contamination on a surface of a subject surface susceptible to degradation by a molecular contaminant. The monitor includes a surface...
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6945089 |
Mass-sensitive sensor
In a mass-sensitive sensor consisting of an acoustic surface wave component on the basis of shear waves, the sensor includes a substrate with an active surface carrying two different layers, one...
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6935158 |
MIS hydrogen sensors
Hydrogen gas sensors employ an epitaxial layer of the thermodynamically stable form of aluminum nitride (AlN) as the “insulator” in an MIS structure having a thin metal gate electrode suitable...
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6931913 |
Chemical agent detector
A chemical agent detector utilizing surface acoustic wave (SAW) sensors for detecting the presence of a multitude of chemical agents by sampling ambient air is provided. A pressure-differential...
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6918283 |
System and method for demonstrating and investigating brownian motion effects on a diamagnetically suspended particle
An apparatus for demonstrating, investigating and observing Brownian motion and temperature of a medium, such as gas or liquid, uses a small particle which is diamagnetically suspended in the...
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6877358 |
Programmable apparatus using molecular resonances for measuring particles suspended in air
A programmable device for analyzing mixtures of suspended vapors and air by pinging particles making up the vapors at their mechanical resonant frequencies and detecting the resultant rings.
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6862917 |
Apparatus for detecting chemical agents including olfactory interferometric lens and method of use
An apparatus and method for detecting gases, gasified agents or other analytes. The apparatus includes a solid body having a first surface area and a second surface area. A first, preferably...
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6848295 |
Acoustic wave sensor apparatus, method and system using wide bandgap materials
An acoustic wave sensor to detect an analyte, the sensor comprising a piezoelectric material including a wide bandgap semiconductor material grown using plasma source molecular beam epitaxy.
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6843101 |
CO2 sensor
A sensor for the measurement of carbon dioxide concentration within an air flow being input to a measuring cell ( 1 ) connected to at least one electroacoustic element ( 2, 3 ) for transmitting and...
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6823720 |
Method for chemical sensing using a microfabricated teeter-totter resonator
A method for sensing a chemical analyte in a fluid stream comprises providing a microfabricated teeter-totter resonator that relies upon a Lorentz force to cause oscillation in a paddle, applying a...
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6823716 |
Device for precision measurement of speed of sound in a gas
A sensor for measuring the speed of sound in a gas. The sensor has a helical coil, through which the gas flows before entering an inner chamber. Flow through the coil brings the gas into thermal...
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