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。

公开(公告)号：EP1027592A1

公开(公告)日：2000-08-16

申请号：EP98953829.3

申请日：1998-10-21

Applicant: Engelhard Sensor Technologies, Inc.

Inventor： KOUZNETSOV, Andrian

IPC: 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.

公开(公告)号：EP0944887A4

公开(公告)日：2001-08-16

申请号：EP97950817

申请日：1997-11-26

Applicant: SLC TECHNOLOGIES INC ,  ENGELHARD SENSOR TECHNOLOGIES

Inventor： MARMAN DOUGLAS H ,  PELTIER MARK A ,  WONG JACOB Y

IPC: G08B17/10 ,  G08B17/117 ,  G08B29/16 ,  G08B29/18 ,  G08B29/20 ,  G08B17/107

CPC classification number: G08B17/10 ,  G08B17/113 ,  G08B17/117 ,  G08B29/16 ,  G08B29/183 ,  G08B29/20

Abstract: A fire detection system (100) combines a CO2 gas detector (14) with a smoke detector (2). Logic circuitry (400) combines the outputs of both detectors to minimize false alarms and provide a rapid response time. In a preferred embodiment the need for periodic cleaning is reduced. In a further preferred embodiment, two alarms indicative of two different types of fires, for example flaming fires and nonflaming fires are available. A map (810) of flaming fire and smoke may be assembled by the system to guide the firefighters. In a yet another preferred embodiment, a tentative fire alarm indication (222, 233) disables a local air conditioning system thereby helping to isolate and control any existing fire.

公开(公告)号：EP1053462A1

公开(公告)日：2000-11-22

申请号：EP98964937.1

申请日：1998-12-23

Applicant: Engelhard Sensor Technologies, Inc.

Inventor： SCHELL, Michael, B.

IPC: G01N7/00 ,  G01J5/02 ,  G08B17/10 ,  F24F3/00

CPC classification number: G01N33/0063 ,  G01N1/2273 ,  G01N33/004 ,  Y02A50/244

Abstract: A method for detecting improper venting of a combustion appliance within an interior space relies upon a carbon dioxide detector to determine whether a preselected criterion indicative of improper venting is exceeded. The preselected criterion can be a threshold concentration of carbon dioxide or a threshold level of rate of rise of carbon dioxide concentration that is exceeded at a specified time or over a specified interval of time. The method can be used to detect leaks in a residential furnace, at very low levels, during start up of the furnace by measuring the preselected criterion in a heated air duct.

公开(公告)号：EP1053462A4

公开(公告)日：2003-07-23

申请号：EP98964937

申请日：1998-12-23

Applicant: ENGELHARD SENSOR TECHNOLOGIES

Inventor： SCHELL MICHAEL B

IPC: G01N1/22 ,  G01N33/00 ,  G01N7/00 ,  F23N5/24 ,  F24F3/00 ,  G01J5/02 ,  G08B17/10

CPC classification number: G01N33/0063 ,  G01N1/2273 ,  G01N33/004 ,  Y02A50/244

Abstract: A method for detecting improper venting of a combustion appliance within an interior space relies upon a carbon dioxide detector to determine whether a preselected criterion indicative of improper venting is exceeded. The preselected criterion can be a threshold concentration of carbon dioxide or a threshold level of rate of rise of carbon dioxide concentration that is exceeded at a specified time or over a specified interval of time. The method can be used to detect leaks in a residential furnace, at very low levels, during start up of the furnace by measuring the preselected criterion in a heated air duct.

公开(公告)号：EP0877995A1

公开(公告)日：1998-11-18

申请号：EP97904879.0

申请日：1997-01-28

Applicant: Engelhard Sensor Technologies, Inc.

Inventor： WONG, Jacob, Y.

IPC: G08B17 ,  G08B29

CPC classification number: G08B29/183 ,  G08B17/10 ,  G08B17/113 ,  G08B17/117 ,  G08B29/26

Abstract: A fire detector that combines a CO2 gas detector with a photoelectric smoke detector to minimize false alarms by logic means that can be integrated into a single chip that can have an ASIC section and a microprocessor section is disclosed. The CO2 gas detector can be single or dual channel. The CO2 gas detector and the photoelectric smoke detector can be separated or combined in a single device that uses a common light source. Also, the CO2 gas detector and photoelectric smoke detector can be combined on a single substrate within a common housing. The smoke based fire detection criteria of the fire detector is dynamically adjusted in response to the measurements formed by the CO2 gas detector.

公开(公告)号：EP0944887B1

公开(公告)日：2007-03-07

申请号：EP97950817.3

申请日：1997-11-26

Applicant: SLC Technologies, Inc ,  Engelhard Sensor Technologies, Inc.

Inventor： MARMAN, Douglas, H. ,  PELTIER, Mark, A. ,  WONG, Jacob, Y.

IPC: G08B17/10 ,  G08B29/18 ,  G08B17/107

CPC classification number: G08B17/10 ,  G08B17/113 ,  G08B17/117 ,  G08B29/16 ,  G08B29/183 ,  G08B29/20

Abstract: A fire detection system (100) combines a CO2 gas detector (14) with a smoke detector (2). Logic circuitry (400) combines the outputs of both detectors to minimize false alarms and provide a rapid response time. In a preferred embodiment the need for periodic cleaning is reduced. In a further preferred embodiment, two alarms indicative of two different types of fires, for example flaming fires and nonflaming fires are available. A map (810) of flaming fire and smoke may be assembled by the system to guide the firefighters. In a yet another preferred embodiment, a tentative fire alarm indication (222, 233) disables a local air conditioning system thereby helping to isolate and control any existing fire.

公开(公告)号：EP0877995A4

公开(公告)日：2001-04-04

申请号：EP97904879

申请日：1997-01-28

Applicant: ENGELHARD SENSOR TECHNOLOGIES

Inventor： WONG JACOB Y

IPC: G08B17/103 ,  G08B17/10 ,  G08B17/117 ,  G08B29/18 ,  G08B29/20 ,  G08B29/26

CPC classification number: G08B29/183 ,  G08B17/10 ,  G08B17/113 ,  G08B17/117 ,  G08B29/26

Abstract: A fire detector that combines a CO2 gas detector with a photoelectric smoke detector to minimize false alarms by logic means that can be integrated into a single chip that can have an ASIC section and a microprocessor section is disclosed. The CO2 gas detector can be single or dual channel. The CO2 gas detector and the photoelectric smoke detector can be separated or combined in a single device that uses a common light source. Also, the CO2 gas detector and photoelectric smoke detector can be combined on a single substrate within a common housing. The smoke based fire detection criteria of the fire detector is dynamically adjusted in response to the measurements formed by the CO2 gas detector.