Patent application number | Description | Published |
20080251379 | ELECTROCHEMICAL SENSOR WITH ZERO CALIBRATION FEATURE AND METHOD OF CALIBRATING - An easily calibrated analytical instrument for sensing a target analyte. The instrument includes an electrochemical sensor and a switch. The electrochemical sensor includes a sensing electrode and a counter electrode. The switch is a normally open switch effective for creating a short circuit between the sensing and counter electrodes when closed. A zero calibration reading can be taken when the switch is closed. | 10-16-2008 |
20090173172 | SYSTEM AND METHOD FOR GENERATING A GAS SAMPLE OF KNOWN AND ADJUSTABLE RELATIVE HUMIDITY - A system and method for providing a destination point with a gas having a selectable known humidity. A gas having an initial relative humidity is alternately directed in accordance with a duty cycle along a wet path effective for humidifying the gas to provide a wet gas, and a dry path effective for either maintaining the initial relative humidity of the gas or dehumidifying the gas to provide a dry gas. The wet and dry gas is blended to produce a blended gas having a selected relative humidity based upon the selected duty cycle. | 07-09-2009 |
20100051481 | COULOMETRIC ANALYTE SENSING INSTRUMENT WITH AN ANALYTE-CONSUMING SENSOR IN A CLOSED CELL - A method for measuring the transmission rate of an analyte through a film. The method includes the steps of (i) separating a chamber into a first cell and a second cell with a known area of a film, (ii) flushing the first cell with an inert gas to remove any target analyte from the first cell, (iii) introducing a gas containing a known concentration of an analyte into the second cell, (iv) sealing the first cell to gas flow through the first cell, and (v) sensing any analyte in the first cell with a sensor that consumes the analyte at a rate greater than the rate at which the analyte is passing through the film, until a steady state rate of analyte consumption is measured by the sensor. | 03-04-2010 |
20100054998 | HUMIDITY CONTROL SYSTEM FOR THE SENSING CELL OF AN ANALYTE PERMEATION TESTING INSTRUMENT - A humidity control system for an analyte permeation testing instrument. The system includes (i) an analyte permeation testing instrument, (ii) a sensor for sensing a target analyte, (iii) a humidity control chamber, and (iv) a selectively permeable membrane permeable to water vapor and impermeable to the target analyte. The analyte permeation testing instrument defines a testing chamber operable for engaging a test film such that the testing chamber is sealingly separated by the test film into a first cell and a second cell throughout a permeation testing period. The sensor is placed in fluid communication with the first cell. The humidity control chamber is positioned adjacent the first cell and in fluid communication with both a source of gas having a known humidity and the first cell, with the selectively permeable membrane sealingly separating the humidity control chamber from the first cell. | 03-04-2010 |
20100116017 | CALIBRATION CARD FOR PHOTOLUMINESCENT OXYGEN SENSORS - A calibration card and method of manufacturing and using the card to calibrate an analytical instrument capable of reading a photoluminescent oxygen probe. The card includes at least (a) a first mass of a first solid state composition comprising an oxygen-sensitive photoluminescent dye that is the same as the probe dye, embedded within an oxygen-permeable carrier matrix that is the same as the probe carrier matrix, wherein the first composition has a first sensitivity to oxygen, and, (b) a second mass of a second solid state composition comprising an oxygen-sensitive photoluminescent dye that is the same as the dye in the first mass, embedded within a carrier matrix that is different from the carrier matrix in the first mass, wherein the second composition has a known second sensitivity to oxygen that is less than the first sensitivity to oxygen. | 05-13-2010 |
20110135545 | SHEET CONFIGURED WITH A TESSELLATED ZIPPER PATTERN OF IDENTICALLY SHAPED SENSOR ELEMENTS AND METHOD OF MANUFACTURE - A sheet of sensors and a method of manufacturing such sheet of sensors. The sheet is configured with (A) a tessellated zipper pattern of identically shaped elements defining (i) a right longitudinal column consisting of a base portion of a right set of elements, (ii) a left longitudinal column consisting of a base portion of a left set of elements, and (iii) an intermediate longitudinal column consisting of alternating tab portions of the right and left elements, and (B) a continuous longitudinal strip of functional material positioned only within the intermediate column. | 06-09-2011 |
20110136247 | PHOTOLUMINESCENT OXYGEN PROBE WITH REDUCED CROSS-SENSITIVITY TO HUMIDITY - An oxygen-sensitive probe having reduced cross-sensitivity to humidity and methods of manufacturing and using such probes to measure oxygen concentrations within an enclosed space. The probe includes a thin film of an oxygen-sensitive photoluminescent dye on a first major surface of a microporous wettable polyolefin support layer. The dye is preferably a solid state composition comprising the oxygen-sensitive photoluminescent dye embedded within an oxygen-permeable hydrophobic polymer matrix. | 06-09-2011 |
20110146842 | INSTRUMENT FOR IMPERMANENT SEALED PERFORATION OF THIN-WALLED PACKAGING - An instrument for impermanent sealed perforation of thin-walled, hermetically sealed packaging. The instrument includes a longitudinally tapered needle and a septum with a hole. The underside of the septum is coated with a pressure sensitive adhesive. The hole through the septum is configured and arranged to permit unrestricted passage of the distal longitudinal end portion of the needle through the hole, while sealingly engaging the longitudinal midsection of the needle. The septum is incapable of sealing the hole through the septum after withdrawal of the needle from the hole. | 06-23-2011 |
20110154881 | CALIBRATION CARD FOR PHOTOLUMINESCENT OXYGEN SENSORS WITH ZERO POINT MAINTAINED WITH A METAL-AIR BATTERY - A calibration card and method of using the card to calibrate an analytical instrument capable of reading a photoluminescent oxygen probe. The card includes at least (a) a first mass of an oxygen sensitive photoluminescent dye retained within a hermetically sealed space so as to isolate the dye from environmental oxygen, and in fluid communication with an activated metal-air battery whereby any oxygen permeating into the hermetically sealed space is quickly consumed by the battery, and (b) a second mass of an oxygen sensitive photoluminescent dye in fluid communication with the environment whereby the second mass of photoluminescent dye is exposed to an environmental concentration of oxygen. | 06-30-2011 |
20110209520 | CALIBRATION CARD FOR OXYGEN OPTICAL SENSORS - A calibration card | 09-01-2011 |
20110223678 | CALIBRATION SYSTEM AND TECHNIQUE FOR PHOTOLUMINESCENT OXYGEN SENSORS WITH ZERO POINT MAINTAINED WITH A METAL-AIR BATTERY - A calibration device and method of using the device to calibrate an analytical instrument capable of reading a photoluminescent oxygen probe. The device includes at least (a) a first mass of an oxygen sensitive photoluminescent dye retained within a hermetically sealed space so as to isolate the dye from environmental oxygen, and in fluid communication with an activated metal-air battery whereby any oxygen permeating into the hermetically sealed space is quickly consumed by the battery, and (b) a second mass of an oxygen sensitive photoluminescent dye in fluid communication with an environmental concentration of oxygen. | 09-15-2011 |
20120129268 | PHOTOLUMINESCENT OXYGEN PROBE WITH REDUCED CROSS-SENSITIVITY TO HUMIDITY - An oxygen-sensitive luminescent element, and probe constructed therefrom, having reduced cross-sensitivity to humidity, and methods of manufacturing and using such luminescent elements and probes to measure oxygen concentrations within an enclosed space. The luminescent element includes a glass fiber carrier substrate bearing an oxygen-sensitive photoluminescent dye. The dye is preferably embedded within an oxygen-permeable hydrophobic polymer matrix. A probe is constructed from the luminescent element by laminating the luminescent element onto a structural support layer. | 05-24-2012 |
20120270261 | ANALYTICAL INSTRUMENT AND METHOD FOR EVALUATING MICROBIAL CONTAMINATION OF AN OBJECT - An instrument and method for ascertaining a viable aerobic microbe count at t | 10-25-2012 |
20130005046 | METHOD OF CONTEMPORANEOUSLY MONITORING CHANGES IN ANALYTE CONCENTRATION IN A PLURALITY OF SAMPLES ON INDIVIDUAL SCHEDULES - A method of contemporaneously monitoring changes in analyte concentration in a plurality of samples using a single monitoring device, wherein monitoring can be commenced and continued on independent timelines for each sample. | 01-03-2013 |
20130005047 | LUMINESCENCE LIFETIME BASED ANALYTE SENSING INSTRUMENTS AND CALIBRATION TECHNIQUE - A method of calibrating a luminescence lifetime sensing instrument | 01-03-2013 |
20140017775 | ANALYTICAL INSTRUMENT FOR EVALUATING MICROBIAL CONTAMINATION OF AN OBJECT - An instrument for ascertaining a viable aerobic microbe count at t | 01-16-2014 |
20140034847 | PHOTOLUMINESCENT OXYGEN PROBE TACK - A photoluminescent oxygen probe comprising a tack with a layer of a pressure-sensitive adhesive and an oxygen-sensitive photoluminescent element on the underside of the head. The probe is effective for sensing oxygen concentration within an enclosed space by puncturing the container defining the enclosed space the with the probe's shank and adhering the underside of the probe's head to the container so as to sealingly surround the puncture, thereby placing the oxygen-sensitive photoluminescent dye on the underside of the probe's head into sensible communication with the enclosed space through the puncture hole. | 02-06-2014 |