Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 8087283 | Handheld gas analysis systems for point-of-care medical applications The disclosure describes an apparatus including a substrate and a gas chromatograph having a fluid inlet and a fluid outlet and being mounted to the substrate. A detector array having a fluid inlet and a fluid outlet and is mounted to the substrate, and the fluid in... | 01/03/2012 |
| 7930924 | System for the online measurement of volatile and semi-volatile compounds and use thereof A system and method of measuring volatile and semi-volatile reduced organic compound content and volatile and semi-volatile oxidized organic compound content in a sample, using a dual detection system is provided. The method comprises introducing the sample into a s... | 04/26/2011 |
| 7836750 | Gas detection system and method An example of a gas detection system includes a gas chromatograph oven, a gas detector, a sample gas moving device, and a flow detector. An example of a method for detecting gas includes flowing a sample gas from the oven, determining whether the flow rate equals or... | 11/23/2010 |
| 7735352 | Multi-dimensional portable gas chromatograph system A portable multi-dimensional gas chromatograph, the gas chromatograph including a carrier gas container, a regulator fluidly connected to the carrier gas container, a dopant chamber containing a reference chemical, at least one pre-concentrator which is fluidly conn... | 06/15/2010 |
| 7685864 | Modular manifold for integrated fluidics and electronics An airtight preconcentrator housing and/or a sensor housing for chemical testing, the housing(s) comprising internal dimensions such that a pre-manufactured preconcentrator and/or sensor can be disposed therein. The housings can also comprise electrical contacts dis... | 03/30/2010 |
| 7410558 | Method and apparatus for determining a total concentration of a component in a mixture of components The invention relates to a method and apparatus for determining a total concentration of a component in a sample, including a reactor for oxidizing or reducing the sample, a chromatographic column coupled to the reactor for separating the component in the sample, an... | 08/12/2008 |
| 7401497 | Microdischarge detector method and apparatus A differential microdischarge detector system. The system comprises two microdischarge detectors (MDDs). One of the MDDs is connected to receive sample analytes to be measured, while the other MDD is connected to receive a reference sample that contains interfering ... | 07/22/2008 |
| 7395175 | Digital data recording apparatus, sampling data identification method thereof, and program for identifying sampling data A digital data recording apparatus, which can record the exact acquisition time of data, a sampling data identification method thereof, and a program for identifying sampling data, are provided. A CPU 11 reads out the program of a first conversion formula. Th... | 07/01/2008 |
| 7383718 | Single stage flow modulator for performing comprehensive chromatography A single stage flow modulator for performing comprehensive chromatography comprises a first chromatographic column, a valve fluidically coupled to at least two fluid conduits, wherein when in a first position, the valve directs a control flow to direct an output of ... | 06/10/2008 |
| 7377150 | Analyzer An analyzer includes a reforming unit which reforms fuel containing an organic compound which contains carbon and hydrogen into a reformed gas containing hydrogen, a flame ionization detector which is connected to the reforming unit, and detects an ion generated by ... | 05/27/2008 |
| 7347080 | Thermal conductivity detector A thermal conductivity detector (TCD) utilizes a modular thermistor assembly that mounts to the TCD body. The thermistor assembly is easily replaceable in the TCD. Within the TCD, a thermistor bead is always held in the same relative location in a gas flow path, whi... | 03/25/2008 |
| 7343779 | High performance, hand-held gas chromatograph, method and system A hand-held, ultra-sensitive gas chromatograph which provides real time detection and analysis of chemical compounds or impurities is disclosed. The detection sensitivity ranges from parts per trillion to parts per million with an average retention time ranging from... | 03/18/2008 |
| 7296458 | Nickel-coated free-standing silicon carbide structure for sensing fluoro or halogen species in semiconductor processing systems, and processes of making and using same A (MEMS)-based gas sensor assembly for detecting a fluorine-containing species in a gas containing same, e.g., an effluent of a semiconductor processing tool undergoing etch cleaning with HF, NF3, etc. Such gas sensor assembly in a preferred embodiment co... | 11/20/2007 |
| 7271595 | Sensor detection apparatus and sensor Provided are two monitor circuits for monitoring two input signals of an input stage differential amplifier, respectively, and two monitor circuit for monitoring two output signals of the input stage differential amplifier, respectively. When failure occurs at the b... | 09/18/2007 |
| 7237430 | Method and apparatus for enhanced detection of a specie using a gas chromatograph The invention includes a method and apparatus for a chromatography system having a chromatographic column for separating gases in a mixture from one another and an electrochemical gas sensor coupled to the chromatographic column for detecting a gas being emitted fro... | 07/03/2007 |
| 7233034 | Hydrogen permeable protective coating for a catalytic surface A protective coating for a surface comprising a layer permeable to hydrogen, said coating being deposited on a catalyst layer; wherein the catalytic activity of the catalyst layer is preserved. ... | 06/19/2007 |
| 7225680 | Differential pressure gauge for filter An apparatus for measuring the differential pressure of fluid in filter. The apparatus comprises a housing defining a pressure chamber. A differential pressure gauge divides the pressure chamber into first and second fluid chambers. The differential pressure gauge i... | 06/05/2007 |
| 7211222 | Gas sensor A powder filler is stuffed in a filler space defined between a housing and a gas sensing element so as to airtightly seal a clearance between the housing and the gas sensing element. The powder filler contains grains whose diameter is in a range from 80 μm to 5,000... | 05/01/2007 |
| 7204125 | Pressure activated sampling system Screening of items for the presence of contaminants, such as explosives residue, is accomplished by subjecting an item loaded into a pressure chamber to a pressure substantially in excess of atmospheric pressure conditions and rapidly decompressing the item to the a... | 04/17/2007 |
| 7185527 | Protecting filaments of a thermal conductivity detector A process for protecting a filament in a thermal conductivity detector from chemical corrosion includes changing the flow direction of the column effluent in the thermal conductivity detector to allow the column effluent to bypass the filament when an undesired comp... | 03/06/2007 |
| 7116421 | Device and method for differential sensing of hydrogen gas using thermoabsorptance or thermoreflectance A hydrogen sensor, useful for trace hydrogen gas detection. The sensor involves providing a gas sample, generating modulated optical excitation sources, bringing the optical excitation source to the side of a metalized thin pyroelectric film, and detecting via a loc... | 10/03/2006 |
| 7107818 | Method and device for comprehensive two-dimensional gas chromatography A method for detecting substances or mixtures of substances within a sample in an apparatus for comprehensive two-dimensional gas-chromatographic analysis according to the present invention, comprising the steps of: subjecting the ... | 09/19/2006 |
| 7100421 | Micro-discharge gas detector A gas detector especially adapted for use with gas chromatographs contains two capillary tubing electrodes through which a gas flows. The inner ends of the electrodes are coaxial and are separated by a gap. The outer end of one of the electrodes forms a gas inlet. T... | 09/05/2006 |
| 7096717 | Control device of gas sensor When the ignition switch of a vehicle is turned OFF, a purging process for increasing the flow of an off-gas fluidizing in each of the outlet side pipings of a fuel cell and discharging water remaining in a fuel cell system to an outside is started to be executed, a... | 08/29/2006 |
| 7061388 | Chemical, biological, radiological, and nuclear weapon detection system comprising array of spatially-disparate sensors and surveillance equipment A chemical, biological, radiological, and nuclear weapon detection system is disclosed that comprises an array of spatially-disparate hazardous material sensors and an array of spatially-disparate video cameras. The telemetry from the sensors and the video feed from... | 06/13/2006 |
| 7052525 | Vehicle integrated protective system A protective system having an upstream detection subsystem to detect a contaminant in an airflow and to provide a contaminant signal, an upstream detection subsystem, a filtration subsystem to filter the contaminant from the airflow, a valve adapted to allow selecti... | 05/30/2006 |
| 7019655 | System and methods for detecting harmful agents within contents of mail A system and methods of the present invention advantageously provide efficient mail processing and handling that, as compared to existing procedures, enhances detection within the mail being processed or handled of biological, germ, chemical, or other harmful agents... | 03/28/2006 |
| 7013707 | Method and apparatus for enhanced detection of a specie using a gas chromatograph The invention includes a method and apparatus for a chromatography system having a chromatographic column for separating gases in a mixture from one another and an electrochemical gas sensor coupled to the chromatographic column for detecting a gas being emitted fro... | 03/21/2006 |
| 6964735 | Method for moving charged particles Devices and methods are disclosed for moving charged molecules through a medium by the application of a plurality of electrical fields of sufficient strength and applied for sufficient amounts of time so as to move the charged molecules through the medium. The devic... | 11/15/2005 |
| 6952945 | Method and apparatus for concentrating samples for analysis A method for analyzing a gas sample is described. The method comprises providing a gas sample, increasing pressure applied to the gas sample to compress the sample to a smaller volume and provide a pneumatically focused gas sample, and analyzing the pneumatically fo... | 10/11/2005 |
| 6952946 | Method for the gas chromatographic analysis of a sample, and analyzer In a gas chromatograph, an injected sample for analysis (3) is passed through a separation device (5) to separate components present in the sample; at the end of the separation device, selected components are detected by a detector (12) and dete... | 10/11/2005 |
| 6928858 | Apparatus and method for thermal conductivity detection in gas chomatography equipment A thermal conductivity detector includes separate sample gas and reference gas chambers. Each chamber has a gas inlet and a gas outlet and a sensor. The chambers are connected by at least one passageway. For example, a passageway can extend from the sample gas chamb... | 08/16/2005 |
| 6895801 | Pressure activated sampling system Screening of items for the presence of contaminants, such as explosives residue, is accomplished by subjecting an item loaded into a pressure chamber to a pressure substantially in excess of atmospheric pressure conditions and rapidly decompressing the item to the a... | 05/24/2005 |
| 6887359 | Chemical micro-sensor An integrated optical capillary electrophoresis system for analyzing an analyte. A modulated optical pump beam impinges on an capillary containing the analyte/buffer solution which is separated by electrophoresis. The thermally-induced change in the index of refract... | 05/03/2005 |
| 6883365 | Focusing device for volatile and semivolatile organic compounds in the gaseous phase A focusing device for volatile and semi-volatile organic compounds in the gaseous phase, comprising a support structure, a container for said organic compounds, a cooling element and a heating element for their transfer to the analysis system, characterized in that ... | 04/26/2005 |
| 6849238 | Measuring sensor for gases The measuring sensor, particularly a lambda probe, has a ceramic sensor member retained at a high temperature during measuring operation. It is shielded from water droplets, carried along in the gas to be analyzed, by a heated protective housing, permeable for the g... | 02/01/2005 |
| 6845650 | Gas chromatograph A gas chromatograph in which the substances of a substance mixture that is to be analyzed are separated in a separation device and are detected in a detector device. An evaluation device (10) provides a result (11) in the form of a quantitative determi... | 01/25/2005 |
| 6779379 | Method and device for vaporization injection The invention concerns a device for vaporizing injections of samples into a gas chromatography analysis device, comprising a vaporization chamber elongated lengthways and heated, as well as a syringe equipped with a needle, the device being of the type in which the ... | 08/24/2004 |
| 6763704 | Foam detector for concentrator attachment for gas chromatograph A foam detector generally including a pair of leads positioned adjacent to a surface layer of a fluid so that foam created on a surface layer of the fluid contacts at least one lead and sends a signal to a controller connected to the leads. ... | 07/20/2004 |
| 6756016 | Gas sensor A gas sensor for the detection of gases comprises a housing and an active element disposed within the housing. The active element is surrounded by a porous insulating material having a bulk density no greater than 0.15 g/cc. Another gas sensor comprises an active el... | 06/29/2004 |
