公开(公告)号：WO9922221A9

公开(公告)日：1999-07-01

申请号：PCT/US9822263

申请日：1998-10-21

Applicant: ENGELHARD SENSOR TECHNOLOGIES

Inventor： KOUZNETSOV ANDRIAN

IPC: G01N21/35 ,  G01N21/61

CPC classification number: G01N21/3504 ,  G01N21/61

Abstract: A diffusion-type NDIR gas analyzer (100) with an improved response time due to convection flow created by a temperature gradient between gas located within a waveguide (2) and gas located within a diffusion pocket of space (8) created between the waveguide and a semi-permeable membrane (7) which surrounds the waveguide. The temperature gradient may be created by a thermally resistive radiation source (1) that is not thermally isolated from the waveguide. The semi-permeable membrane is made of a hydrophobic material and has a thickness sufficient to provide its own structural integrity. The semi-permeable membrane can have a pore size less than approximately 50 micrometers and be comprised of ultrahigh molecular weight polyethylene or other suitable materials.

Abstract translation: 扩散型NDIR气体分析器（100），其由于位于波导（2）内的气体和位于波导和波导（2）的扩散槽内的气体之间的温度梯度产生的对流而具有改善的响应时间， 围绕波导的半透膜（7）。 温度梯度可以由不与波导热隔离的热阻辐射源（1）产生。 半透膜由疏水材料制成，具有足以提供其自身结构完整性的厚度。 半透膜的孔径可以小于约50微米，并且由超高分子量聚乙烯或其它合适的材料组成。

公开(公告)号：CA2307782C

公开(公告)日：2010-10-12

申请号：CA2307782

申请日：1998-10-21

Applicant: ENGELHARD SENSOR TECHNOLOGIES

Inventor： KOUZNETSOV ANDRIAN

IPC: G01N21/61 ,  G01N21/35

Abstract: A diffusion-type NDIR gas analyzer (100) with an improved response time due to convection flow created by a temperature gradient between gas located within a waveguide (2) and gas located within a diffusion pocket of space (8) created between the waveguide and a semi-permeable membrane (7) which surrounds the waveguide. The temperature gradient may be created by a thermally resistive radiation source (1) that is not thermally isolated from the waveguide. The semi-permeable membrane is made of a hydrophobic material and has a thickness sufficient to provide its own structural integrity. The semi-permeable membrane can have a pore size less than approximately 50 micrometers and be comprised of ultrahigh molecular weight polyethylene or other suitable materials.

公开(公告)号：AU1272699A

公开(公告)日：1999-05-17

申请号：AU1272699

申请日：1998-10-21

Applicant: ENGELHARD SENSOR TECHNOLOGIES

Inventor： STEINTHAL GREGORY ,  KOUZNETSOV ANDRIAN

IPC: G01J3/10 ,  H01K1/02

Abstract: A power circuit for use with a resistive thermal radiation source in which the power delivered to the resistive thermal radiation source will remain constant within a preselected deviation over a fixed period of time as the source resistance of the source varies between an initial source resistance and a second source resistance at the operating temperature. The power circuit is designed to maintain constant power within a preselected deviation by using the resistance of the resistive thermal radiation source to calculate a preselected resistance used in the power circuit according to the following equation: wherein DELTA P=Psi-Ps; Psi=the initial power on the resistive thermal radiation source; Ps=the power on the resistive thermal radiation source when the source resistance is equal to the second source resistance; K1=RO/Rsi; R0=the preselected resistance; Rsi=the initial source resistance; K2=Rs/Rsi; and Rs=the second source resistance.

公开(公告)号：CA2307782A1

公开(公告)日：1999-05-06

申请号：CA2307782

申请日：1998-10-21

Applicant: ENGELHARD SENSOR TECHNOLOGIES

Inventor： KOUZNETSOV ANDRIAN

IPC: G01N21/35 ,  G01N21/61

Abstract: A diffusion-type NDIR gas analyzer (100) with an improved response time due to convection flow created by a temperature gradient between gas located within a waveguide (2) and gas located within a diffusion pocket of space (8) created between the waveguide and a semi-permeable membrane (7) which surrounds the waveguide. The temperature gradient may be created by a thermally resistive radiation source (1) that is not thermally isolated from the waveguide. The semi-permeable membrane is made of a hydrophobic material and has a thickness sufficient to provide its own structural integrity. The semi-permeable membrane can have a pore size less than approximately 50 micrometers and be comprised of ultrahigh molecular weight polyethylene or other suitable materials.

公开(公告)号：AU753912B2

公开(公告)日：2002-10-31

申请号：AU1110299

申请日：1998-10-21

Applicant: ENGELHARD SENSOR TECHNOLOGIES

Inventor： KOUZNETSOV ANDRIAN

IPC: G01N21/35 ,  G01N21/61

Abstract: A diffusion-type NDIR gas analyzer with an improved response time due to convection flow created by a temperature gradient between gas located within a waveguide and gas located within a diffusion pocket of space created between the waveguide and a semi-permeable membrane which surrounds the waveguide. The temperature gradient may be created by a thermally resistive radiation source that is not thermally isolated from the waveguide. The semi-permeable membrane is made of a hydrophobic material and has a thickness sufficient to provide its own structural integrity. The semi-permeable membrane can have a porosity less than approximately 50 microns and be comprised of ultra high molecular weight polyethylene or Teflon(R).

公开(公告)号：EP1027592A4

公开(公告)日：2002-07-17

申请号：EP98953829

申请日：1998-10-21

Applicant: ENGELHARD SENSOR TECHNOLOGIES

Inventor： KOUZNETSOV ANDRIAN

IPC: G01N21/35 ,  G01N21/61

CPC classification number: G01N21/3504 ,  G01N21/61

Abstract: A diffusion-type NDIR gas analyzer (100) with an improved response time due to convection flow created by a temperature gradient between gas located within a waveguide (2) and gas located within a diffusion pocket of space (8) created between the waveguide and a semi-permeable membrane (7) which surrounds the waveguide. The temperature gradient may be created by a thermally resistive radiation source (1) that is not thermally isolated from the waveguide. The semi-permeable membrane is made of a hydrophobic material and has a thickness sufficient to provide its own structural integrity. The semi-permeable membrane can have a pore size less than approximately 50 micrometers and be comprised of ultrahigh molecular weight polyethylene or other suitable materials.

Abstract translation: 扩散型NDIR气体分析仪（100）由于由位于波导（2）内的气体与位于波导（2）之间的空间（8）的扩散凹穴内的气体之间的温度梯度产生的对流流动而具有改进的响应时间 包围波导的半透膜（7）。 温度梯度可以由不与波导热隔离的热阻辐射源（1）产生。 半透膜由疏水性材料制成，并具有足以提供其自身结构完整性的厚度。 半透膜可以具有小于约50微米的孔径并且由超高分子量聚乙烯或其他合适的材料构成。