公开(公告)号：AU2011318585A1

公开(公告)日：2013-05-09

申请号：AU2011318585

申请日：2011-02-15

Applicant: SPECTRASENSORS INC

Inventor： FEITISCH ALFRED ,  KELLER LUTZ ,  LIU XIANG ,  SCHREMPEL MATHIAS ,  HELBLEY KEITH BENJAMIN

IPC: G01N21/35 ,  G01N21/61

Abstract: A valid state of an analytical system that includes a light source (102) and a detector (106) can be verified by determining that deviation of first light intensity data quantifying a first intensity of light received at the detector from the light source after the light has passed at least once through each of a reference gas in a validation cell (114) and a zero gas from a stored data set does not exceed a pre-defined threshold deviation. The stored data set can represent at least one previous measurement collected during a previous instrument validation process performed on the analytical system. The reference gas can include a known amount of an analyte. A concentration of the analyte in a sample gas in a measurement cell (112) can be determined by correcting second light intensity data quantifying a second intensity of the light received at the detector after the light passes at least once through each of the reference gas in the validation cell and a sample gas containing an unknown concentration of the analyte compound. Related systems, methods, and articles of manufacture are also described.

公开(公告)号：CA2815323A1

公开(公告)日：2012-04-26

申请号：CA2815323

申请日：2011-02-15

Applicant: SPECTRASENSORS INC

Inventor： FEITISCH ALFRED ,  KELLER LUTZ ,  LIU XIANG ,  SCHREMPEL MATHIAS ,  HELBLEY KEITH BENJAMIN

IPC: G01N21/35 ,  G01N21/61

Abstract: A valid state of an analytical system that includes a light source (102) and a detector (106) can be verified by determining that deviation of first light intensity data quantifying a first intensity of light received at the detector from the light source after the light has passed at least once through each of a reference gas in a validation cell (114) and a zero gas from a stored data set does not exceed a pre-defined threshold deviation. The stored data set can represent at least one previous measurement collected during a previous instrument validation process performed on the analytical system. The reference gas can include a known amount of an analyte. A concentration of the analyte in a sample gas in a measurement cell (112) can be determined by correcting second light intensity data quantifying a second intensity of the light received at the detector after the light passes at least once through each of the reference gas in the validation cell and a sample gas containing an unknown concentration of the analyte compound. Related systems, methods, and articles of manufacture are also described.

公开(公告)号：AU2008242467B2

公开(公告)日：2011-09-29

申请号：AU2008242467

申请日：2008-01-24

Applicant: SPECTRASENSORS INC

Inventor： ALFRED FEITISCH ,  SANGER GREGORY M ,  XIANG LIU ,  XIN ZHOU

IPC: G01N21/31 ,  G01N21/35 ,  G01N21/39

Abstract: Concentrations of a target analyte in a gas mixture containing one or more background analytes having potentially interfering spectral absorption features can be calculated by compensating for background analyte absorption at a target wavelength used to quantify the target analyte. Absorption can be measured at a reference wavelength (302) chosen to quantify the concentration of the background analyte. Using a background gas adjustment factor or function, the absorption measured at the reference wavelength can be used to calculate absorption due to the background analyte at the target wavelength (304) and thereby compensate for this background absorption to more accurately calculate the target analyte concentration in real or near real time (306). Additional background analytes can optionally be compensated for by using one or more additional reference wavelengths.

公开(公告)号：AU2009333000A1

公开(公告)日：2011-08-18

申请号：AU2009333000

申请日：2009-12-24

Applicant: SPECTRASENSORS INC

Inventor： XUEJIAO HU ,  ALFRED FEITISCH

IPC: G01N21/39 ,  G01N21/53

Abstract: Thermally controlled enclosures that can be used with gas analyzers are described. The enclosures incorporate one or more phase changing materials that buffer ambient and internal heat loads to reduce the power consumption demand of mechanical or electronic heating apparatus. Maintenance of gas analyzer equipment at a consistent temperature can be important to achieving stable and reproducible results. Related systems, apparatus, methods, and/or articles are also described.

公开(公告)号：CA2750180A1

公开(公告)日：2010-07-08

申请号：CA2750180

申请日：2009-12-24

Applicant: SPECTRASENSORS INC

Inventor： HU XUEJIAO ,  FEITISCH ALFRED

IPC: G01N21/39 ,  G01N21/53

Abstract: Thermally controlled enclosures that can be used with gas analyzers are described. The enclosures incorporate one or more phase changing materials that buffer ambient and internal heat loads to reduce the power consumption demand of mechanical or electronic heating apparatus. Maintenance of gas analyzer equipment at a consistent temperature can be important to achieving stable and reproducible results. Related systems, apparatus, methods, and/or articles are also described.

公开(公告)号：CA2680798A1

公开(公告)日：2008-09-18

申请号：CA2680798

申请日：2008-03-14

Applicant: SPECTRASENSORS INC

Inventor： SANGER GREGORY M ,  ZHOU XIN ,  XIANG LIU ,  FEITISCH ALFRED

IPC: G01N21/39 ,  G01J3/433 ,  G01N21/35

Abstract: An apparatus for detecting a concentration of a trace target gas in a sam ple gas comprises a light source (110), for example a tunable diode laser, f or emitting light at a wavelength corresponding to an absorption line of the target gas and means (105) operatively connected to said light source for m odulating the wavelength of the emitted light, a detector (125) positioned t o detect the intensity of light emitted from the light source that has passe d through the sample gas at a multiple of the modulation frequency of the li ght source, for example second harmonic detection, a pressure sensor (120) f or detecting the pressure of the sample gas, and a control unit (135) couple d to the detector, the pressure sensor, and the light source, said control u nit being arranged to adjust the modulation amplitude' of the light source b ased on the detected pressure.

公开(公告)号：CA2893089C

公开(公告)日：2017-09-12

申请号：CA2893089

申请日：2013-12-12

Applicant: SPECTRASENSORS INC

Inventor： KELLER LUTZ ,  FEITISCH ALFRED ,  SCOTT PETER ,  SCHREMPEL MATHIAS ,  ST JOHN NATHAN

IPC: G01N21/03 ,  G01N21/09

Abstract: A spectrometer cell can include a spacer, at least one end cap, and at least one mirror with a reflective surface. The end cap can be positioned proximate to a first contact end of the spacer such that the end cap and spacer at least partially enclose an internal volume of the spectrometer cell. The mirror can be secured in place by a mechanical attachment that may include attachment materials that are chemically inert to at least one reactive gas compound, be thermally stable above at least 120 °C, and be capable of holding an optical axis of the reflective surface in a fixed orientation relative to other components of the spectrometer cell and or a spectrometer device that comprises the spectrometer cell. The mirror can optionally be constructed of a material such as stainless steel, copper, aluminum, alumino-silicate, ceramic, or the like. Related methods, articles of manufacture, systems, etc. are described.

公开(公告)号：CA2815323C

公开(公告)日：2017-06-13

申请号：CA2815323

申请日：2011-02-15

Applicant: SPECTRASENSORS INC

Inventor： FEITISCH ALFRED ,  KELLER LUTZ ,  LIU XIANG ,  SCHREMPEL MATHIAS ,  HELBLEY KEITH BENJAMIN

IPC: G01J3/02

Abstract: A valid state of an analytical system that includes a light source (102) and a detector (106) can be verified by determining that deviation of first light intensity data quantifying a first intensity of light received at the detector from the light source after the light has passed at least once through each of a reference gas in a validation cell (114) and a zero gas from a stored data set does not exceed a pre-defined threshold deviation. The stored data set can represent at least one previous measurement collected during a previous instrument validation process performed on the analytical system. The reference gas can include a known amount of an analyte. A concentration of the analyte in a sample gas in a measurement cell (112) can be determined by correcting second light intensity data quantifying a second intensity of the light received at the detector after the light passes at least once through each of the reference gas in the validation cell and a sample gas containing an unknown concentration of the analyte compound. Related systems, methods, and articles of manufacture are also described.

公开(公告)号：AU2015346386A1

公开(公告)日：2017-05-18

申请号：AU2015346386

申请日：2015-11-11

Applicant: SPECTRASENSORS INC

Inventor： LIU XIANG ,  FEITISCH ALFRED ,  HELBLEY KEITH BENJAMIN ,  TEDESCO JAMES

IPC: G01N21/39 ,  G01N21/3504 ,  G01N21/65

Abstract: Background composition concentration data representative of an actual background composition of a sample gas can be used to model absorption spectroscopy measurement data obtained for a gas sample and to correct an analysis of the absorption spectroscopy data (e.g. for structural interference and collisional broadening) based on the modeling.

公开(公告)号：HUE029547T2

公开(公告)日：2017-03-28

申请号：HUE09837058

申请日：2009-12-24

Applicant: SPECTRASENSORS INC

Inventor： HU XUEJIAO ,  FEITISCH ALFRED

IPC: G01N21/39 ,  G01N21/35 ,  G01N21/53