The Experts below are selected from a list of 46671 Experts worldwide ranked by ideXlab platform
Robert Puers - One of the best experts on this subject based on the ideXlab platform.
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An optical Absolute Pressure sensor for high-temperature applications, fabricated directly on a fiber
Journal of Micromechanics and Microengineering, 2009Co-Authors: Frederik Ceyssens, Maarten Driesen, Robert PuersAbstract:Fiber optical Pressure sensors show great promise in monitoring harsh environments as sensitive readout electronics can be located remotely. In this paper, a process based on thin film techniques and focused ion beam (FIB) machining is demonstrated that allows the fabrication of a Fabry–Perot interferometer-based sensor directly on top of an optical fiber. Besides its extremely small size and rugged monolithic construction, the silica-based sensor has the advantage that thermal mismatch is minimal and a vacuum reference Pressure cavity is present, enabling application in high-temperature environments. Operation in an environment up to 600 °C is demonstrated. Furthermore, a possible route toward mass fabrication of such sensors is presented, avoiding the need for a FIB operation.
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a low cost and highly integrated fiber optical Pressure sensor system
Sensors and Actuators A-physical, 2007Co-Authors: Frederik Ceyssens, Maarten Driesen, Kristof Wouters, Robert PuersAbstract:This paper presents a simple fiber-optic based Pressure measurement system, in which both sensor and readout parts are constructed using batch micromachining techniques, supplemented with some straightforward assembly steps. Prototypes of relative and Absolute Pressure sensors parts and a readout part have been realized. Goal of this research is to enable deployment of such harsh environment sensors in high-volume, low-cost applications.
M Sardi - One of the best experts on this subject based on the ideXlab platform.
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final report on key comparison ccm p k4 in Absolute Pressure from 1 pa to 1000 pa
2002Co-Authors: Mercede Bergoglio, N Bignell, S S Hong, Karl Jousten, Pardeep Mohan, F J Redgrave, M SardiAbstract:This report describes a CCM key comparison of low Absolute-Pressure standards at seven National Metrology Institutes (NMIs) that was carried out during the period March 1998 to September 1999 in order to determine their degrees of equivalence at Pressures in the range 1 Pa to 1000 Pa. The primary standards, which represent two principal measurement methods, included five liquid-column manometers and four static expansion systems. The transfer standard package consisted of four high-precision Pressure transducers, two capacitance diaphragm gauges to provide high resolution at low Pressures, and two resonant silicon gauges to provide the required calibration stability. Two nominally identical transfer packages were used to reduce the time required for the measurements, with Package A being circulated among laboratories in the European region (IMGC, NPL-UK, and PTB) and Package B being circulated among laboratories in the Asia-Pacific region (CSIRO, KRISS, and NPL-I). The results obtained with different transfer packages were normalized by using data obtained from simultaneous calibrations of the two packages at the pilot laboratory (NIST). The degrees of equivalence of the measurement standards were determined in two ways, deviations from key comparison reference values and pairwise differences between these deviations. Apart from results from one NMI that were identified as outliers, the Absolute Pressure standards of the seven participating NMIs were generally found to be equivalent and the results revealed no significant relative bias between the two principal methods tested by this comparison.
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final report on key comparison ccm p k4 of Absolute Pressure standards from 1 pa to 1000 pa
Metrologia, 2002Co-Authors: A P Miiller, Mercede Bergoglio, N Bignell, S S Hong, Karl Jousten, Pardeep Mohan, F J Redgrave, K M K Fen, M SardiAbstract:A key comparison of low Absolute Pressure standards, organized under the auspices of the Consultative Committee for Mass and Related Quantities (CCM), was carried out at seven national metrology institutes (NMIs) between March 1998 and September 1999 in order to determine the degrees of equivalence of the standards at Pressures in the range 1 Pa to 1000 Pa. The primary standards, which represent two principal measurement methods, included five liquid-column manometers and four static expansion systems. The transfer standard package consisted of four high-precision Pressure transducers: two capacitance diaphragm gauges to provide high resolution at low Pressures, and two resonant silicon gauges to provide the required calibration stability. Two nominally identical transfer packages were used to reduce the time required for the measurements, with Package A being circulated among laboratories in the European region (Istituto di Metrologia G. Colonnetti, Italy; National Physical Laboratory, UK; Physikalisch-Technische Bundesanstalt, Germany) and Package B in the Asia-Pacific region (CSIRO-National Measurement Laboratory, Australia; Korea Research Institute of Standards and Science; National Physical Laboratory of India). The results obtained were normalized using data obtained from simultaneous calibrations of the two packages at the pilot laboratory (National Institute of Standards and Technology, USA). The degrees of equivalence of the measurement standards were determined in two ways: deviations from key comparison reference values and pairwise differences between these deviations. Apart from results from one NMI that were identified as outliers, the Absolute-Pressure standards of the participants were generally found to be equivalent and the results revealed no significant relative bias between the two principal methods tested.
Frederik Ceyssens - One of the best experts on this subject based on the ideXlab platform.
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An optical Absolute Pressure sensor for high-temperature applications, fabricated directly on a fiber
Journal of Micromechanics and Microengineering, 2009Co-Authors: Frederik Ceyssens, Maarten Driesen, Robert PuersAbstract:Fiber optical Pressure sensors show great promise in monitoring harsh environments as sensitive readout electronics can be located remotely. In this paper, a process based on thin film techniques and focused ion beam (FIB) machining is demonstrated that allows the fabrication of a Fabry–Perot interferometer-based sensor directly on top of an optical fiber. Besides its extremely small size and rugged monolithic construction, the silica-based sensor has the advantage that thermal mismatch is minimal and a vacuum reference Pressure cavity is present, enabling application in high-temperature environments. Operation in an environment up to 600 °C is demonstrated. Furthermore, a possible route toward mass fabrication of such sensors is presented, avoiding the need for a FIB operation.
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a low cost and highly integrated fiber optical Pressure sensor system
Sensors and Actuators A-physical, 2007Co-Authors: Frederik Ceyssens, Maarten Driesen, Kristof Wouters, Robert PuersAbstract:This paper presents a simple fiber-optic based Pressure measurement system, in which both sensor and readout parts are constructed using batch micromachining techniques, supplemented with some straightforward assembly steps. Prototypes of relative and Absolute Pressure sensors parts and a readout part have been realized. Goal of this research is to enable deployment of such harsh environment sensors in high-volume, low-cost applications.
Mercede Bergoglio - One of the best experts on this subject based on the ideXlab platform.
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final report on euramet m p k4 2010 key and supplementary comparison of national Pressure standards in the range 1 pa to 15 kpa of Absolute and gauge Pressure
Metrologia, 2014Co-Authors: Z Krajicek, Mercede Bergoglio, Karl Jousten, Pierre Otal, Wladimir Sabuga, Sari Saxholm, D Pražak, Martin VicarAbstract:This report describes a EURAMET comparison of five European National Metrology Institutes in low gauge and Absolute Pressure in gas (nitrogen), denoted as EURAMET.M.P-K4.2010. Its main intention is to state equivalence of the Pressure standards, in particular those based on the technology of force-balanced piston gauges such as e.g. FRS by Furness Controls, UK and FPG8601 by DHI-Fluke, USA. It covers the range from 1 Pa to 15 kPa, both gauge and Absolute. The comparison in Absolute mode serves as a EURAMET Key Comparison which can be linked to CCM.P-K4 and CCM.P-K2 via PTB. The comparison in gauge mode is a supplementary comparison. The comparison was carried out from September 2008 till October 2012. The participating laboratories were the following: CMI, INRIM, LNE, MIKES, PTB-Berlin (Absolute Pressure 1 kPa and below) and PTB-Braunschweig (Absolute Pressure 1 kPa and above and gauge Pressure). CMI was the pilot laboratory and provided a transfer standard for the comparison. This transfer standard was also the laboratory standard of CMI at the same time, which resulted in a unique and logistically difficult star comparison. Both in gauge and Absolute Pressures all the participating institutes successfully proved their equivalence with respect to the reference value and all also proved mutual bilateral equivalences in all the points. All the participating laboratories are also equivalent with the reference values of CCM.P-K4 and CCM.P-K2 in the relevant points. The comparison also proved the ability of FPG8601 to serve as a transfer standard. Main text. To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/. The final report has been peer-reviewed and approved for publication by the CCM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).
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final report on key comparison ccm p k4 in Absolute Pressure from 1 pa to 1000 pa
2002Co-Authors: Mercede Bergoglio, N Bignell, S S Hong, Karl Jousten, Pardeep Mohan, F J Redgrave, M SardiAbstract:This report describes a CCM key comparison of low Absolute-Pressure standards at seven National Metrology Institutes (NMIs) that was carried out during the period March 1998 to September 1999 in order to determine their degrees of equivalence at Pressures in the range 1 Pa to 1000 Pa. The primary standards, which represent two principal measurement methods, included five liquid-column manometers and four static expansion systems. The transfer standard package consisted of four high-precision Pressure transducers, two capacitance diaphragm gauges to provide high resolution at low Pressures, and two resonant silicon gauges to provide the required calibration stability. Two nominally identical transfer packages were used to reduce the time required for the measurements, with Package A being circulated among laboratories in the European region (IMGC, NPL-UK, and PTB) and Package B being circulated among laboratories in the Asia-Pacific region (CSIRO, KRISS, and NPL-I). The results obtained with different transfer packages were normalized by using data obtained from simultaneous calibrations of the two packages at the pilot laboratory (NIST). The degrees of equivalence of the measurement standards were determined in two ways, deviations from key comparison reference values and pairwise differences between these deviations. Apart from results from one NMI that were identified as outliers, the Absolute Pressure standards of the seven participating NMIs were generally found to be equivalent and the results revealed no significant relative bias between the two principal methods tested by this comparison.
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final report on key comparison ccm p k4 of Absolute Pressure standards from 1 pa to 1000 pa
Metrologia, 2002Co-Authors: A P Miiller, Mercede Bergoglio, N Bignell, S S Hong, Karl Jousten, Pardeep Mohan, F J Redgrave, K M K Fen, M SardiAbstract:A key comparison of low Absolute Pressure standards, organized under the auspices of the Consultative Committee for Mass and Related Quantities (CCM), was carried out at seven national metrology institutes (NMIs) between March 1998 and September 1999 in order to determine the degrees of equivalence of the standards at Pressures in the range 1 Pa to 1000 Pa. The primary standards, which represent two principal measurement methods, included five liquid-column manometers and four static expansion systems. The transfer standard package consisted of four high-precision Pressure transducers: two capacitance diaphragm gauges to provide high resolution at low Pressures, and two resonant silicon gauges to provide the required calibration stability. Two nominally identical transfer packages were used to reduce the time required for the measurements, with Package A being circulated among laboratories in the European region (Istituto di Metrologia G. Colonnetti, Italy; National Physical Laboratory, UK; Physikalisch-Technische Bundesanstalt, Germany) and Package B in the Asia-Pacific region (CSIRO-National Measurement Laboratory, Australia; Korea Research Institute of Standards and Science; National Physical Laboratory of India). The results obtained were normalized using data obtained from simultaneous calibrations of the two packages at the pilot laboratory (National Institute of Standards and Technology, USA). The degrees of equivalence of the measurement standards were determined in two ways: deviations from key comparison reference values and pairwise differences between these deviations. Apart from results from one NMI that were identified as outliers, the Absolute-Pressure standards of the participants were generally found to be equivalent and the results revealed no significant relative bias between the two principal methods tested.
Karl Jousten - One of the best experts on this subject based on the ideXlab platform.
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final report on euramet m p k4 2010 key and supplementary comparison of national Pressure standards in the range 1 pa to 15 kpa of Absolute and gauge Pressure
Metrologia, 2014Co-Authors: Z Krajicek, Mercede Bergoglio, Karl Jousten, Pierre Otal, Wladimir Sabuga, Sari Saxholm, D Pražak, Martin VicarAbstract:This report describes a EURAMET comparison of five European National Metrology Institutes in low gauge and Absolute Pressure in gas (nitrogen), denoted as EURAMET.M.P-K4.2010. Its main intention is to state equivalence of the Pressure standards, in particular those based on the technology of force-balanced piston gauges such as e.g. FRS by Furness Controls, UK and FPG8601 by DHI-Fluke, USA. It covers the range from 1 Pa to 15 kPa, both gauge and Absolute. The comparison in Absolute mode serves as a EURAMET Key Comparison which can be linked to CCM.P-K4 and CCM.P-K2 via PTB. The comparison in gauge mode is a supplementary comparison. The comparison was carried out from September 2008 till October 2012. The participating laboratories were the following: CMI, INRIM, LNE, MIKES, PTB-Berlin (Absolute Pressure 1 kPa and below) and PTB-Braunschweig (Absolute Pressure 1 kPa and above and gauge Pressure). CMI was the pilot laboratory and provided a transfer standard for the comparison. This transfer standard was also the laboratory standard of CMI at the same time, which resulted in a unique and logistically difficult star comparison. Both in gauge and Absolute Pressures all the participating institutes successfully proved their equivalence with respect to the reference value and all also proved mutual bilateral equivalences in all the points. All the participating laboratories are also equivalent with the reference values of CCM.P-K4 and CCM.P-K2 in the relevant points. The comparison also proved the ability of FPG8601 to serve as a transfer standard. Main text. To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/. The final report has been peer-reviewed and approved for publication by the CCM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).
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final report on key comparison ccm p k4 in Absolute Pressure from 1 pa to 1000 pa
2002Co-Authors: Mercede Bergoglio, N Bignell, S S Hong, Karl Jousten, Pardeep Mohan, F J Redgrave, M SardiAbstract:This report describes a CCM key comparison of low Absolute-Pressure standards at seven National Metrology Institutes (NMIs) that was carried out during the period March 1998 to September 1999 in order to determine their degrees of equivalence at Pressures in the range 1 Pa to 1000 Pa. The primary standards, which represent two principal measurement methods, included five liquid-column manometers and four static expansion systems. The transfer standard package consisted of four high-precision Pressure transducers, two capacitance diaphragm gauges to provide high resolution at low Pressures, and two resonant silicon gauges to provide the required calibration stability. Two nominally identical transfer packages were used to reduce the time required for the measurements, with Package A being circulated among laboratories in the European region (IMGC, NPL-UK, and PTB) and Package B being circulated among laboratories in the Asia-Pacific region (CSIRO, KRISS, and NPL-I). The results obtained with different transfer packages were normalized by using data obtained from simultaneous calibrations of the two packages at the pilot laboratory (NIST). The degrees of equivalence of the measurement standards were determined in two ways, deviations from key comparison reference values and pairwise differences between these deviations. Apart from results from one NMI that were identified as outliers, the Absolute Pressure standards of the seven participating NMIs were generally found to be equivalent and the results revealed no significant relative bias between the two principal methods tested by this comparison.
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final report on key comparison ccm p k4 of Absolute Pressure standards from 1 pa to 1000 pa
Metrologia, 2002Co-Authors: A P Miiller, Mercede Bergoglio, N Bignell, S S Hong, Karl Jousten, Pardeep Mohan, F J Redgrave, K M K Fen, M SardiAbstract:A key comparison of low Absolute Pressure standards, organized under the auspices of the Consultative Committee for Mass and Related Quantities (CCM), was carried out at seven national metrology institutes (NMIs) between March 1998 and September 1999 in order to determine the degrees of equivalence of the standards at Pressures in the range 1 Pa to 1000 Pa. The primary standards, which represent two principal measurement methods, included five liquid-column manometers and four static expansion systems. The transfer standard package consisted of four high-precision Pressure transducers: two capacitance diaphragm gauges to provide high resolution at low Pressures, and two resonant silicon gauges to provide the required calibration stability. Two nominally identical transfer packages were used to reduce the time required for the measurements, with Package A being circulated among laboratories in the European region (Istituto di Metrologia G. Colonnetti, Italy; National Physical Laboratory, UK; Physikalisch-Technische Bundesanstalt, Germany) and Package B in the Asia-Pacific region (CSIRO-National Measurement Laboratory, Australia; Korea Research Institute of Standards and Science; National Physical Laboratory of India). The results obtained were normalized using data obtained from simultaneous calibrations of the two packages at the pilot laboratory (National Institute of Standards and Technology, USA). The degrees of equivalence of the measurement standards were determined in two ways: deviations from key comparison reference values and pairwise differences between these deviations. Apart from results from one NMI that were identified as outliers, the Absolute-Pressure standards of the participants were generally found to be equivalent and the results revealed no significant relative bias between the two principal methods tested.
