WO2008012823A3 - Passive infrared detectors - Google Patents

Passive infrared detectors Download PDF

Info

Publication number
WO2008012823A3
WO2008012823A3 PCT/IL2007/000939 IL2007000939W WO2008012823A3 WO 2008012823 A3 WO2008012823 A3 WO 2008012823A3 IL 2007000939 W IL2007000939 W IL 2007000939W WO 2008012823 A3 WO2008012823 A3 WO 2008012823A3
Authority
WO
WIPO (PCT)
Prior art keywords
infrared radiation
near infrared
light
level
radiation
Prior art date
Application number
PCT/IL2007/000939
Other languages
French (fr)
Other versions
WO2008012823A2 (en
Inventor
Boris Zhevelev
Yaacov Kotlicki
Original Assignee
Visonic Ltd
Boris Zhevelev
Yaacov Kotlicki
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Visonic Ltd, Boris Zhevelev, Yaacov Kotlicki filed Critical Visonic Ltd
Priority to US12/227,274 priority Critical patent/US7875852B2/en
Priority to GB0901327A priority patent/GB2454381B/en
Publication of WO2008012823A2 publication Critical patent/WO2008012823A2/en
Publication of WO2008012823A3 publication Critical patent/WO2008012823A3/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/208—Filters for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/0022—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/0022—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
    • G01J5/0025—Living bodies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0801—Means for wavelength selection or discrimination
    • G01J5/0802—Optical filters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0808—Convex mirrors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0893—Arrangements to attach devices to a pyrometer, i.e. attaching an optical interface; Spatial relative arrangement of optical elements, e.g. folded beam path
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/19—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems
    • G08B13/191—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems using pyroelectric sensor means
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/19—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems
    • G08B13/193—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems using focusing means
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/04—Monitoring of the detection circuits
    • G08B29/046—Monitoring of the detection circuits prevention of tampering with detection circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/04—Casings
    • G01J5/046—Materials; Selection of thermal materials

Abstract

A passive infrared detector assembly including a detector housing comprising a window transparent to far infrared radiation, at least one sensor sensitive to the far infrared radiation and disposed within the detector housing and an anti-masking subassembly, including at least one light guide having a serrated light aperture, the light aperture defining a plurality of teeth like portions and a plurality of grooves and being disposed close to the outside of the window, at least one infrared light emitter operative to emit near infrared radiation via the light aperture of the at least one light guide and a near infrared radiation receiver operative to receive radiation emitted by the at least one near infrared light emitter and to measure the level of received near infrared radiation and to provide a masking alarm signal upon detection of a predetermined change in the level of the received near infrared radiation.
PCT/IL2007/000939 2006-07-27 2007-07-26 Passive infrared detectors WO2008012823A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US12/227,274 US7875852B2 (en) 2006-07-27 2007-07-26 Passive infrared detectors
GB0901327A GB2454381B (en) 2006-07-27 2007-07-26 Passive infrared detectors

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US83436706P 2006-07-27 2006-07-27
US60/834,367 2006-07-27

Publications (2)

Publication Number Publication Date
WO2008012823A2 WO2008012823A2 (en) 2008-01-31
WO2008012823A3 true WO2008012823A3 (en) 2009-04-16

Family

ID=38981876

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/IL2007/000915 WO2008012805A2 (en) 2006-07-27 2007-07-19 Passive infrared detectors
PCT/IL2007/000939 WO2008012823A2 (en) 2006-07-27 2007-07-26 Passive infrared detectors

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/IL2007/000915 WO2008012805A2 (en) 2006-07-27 2007-07-19 Passive infrared detectors

Country Status (3)

Country Link
US (2) US8017913B2 (en)
GB (2) GB2453484B (en)
WO (2) WO2008012805A2 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2498232A1 (en) * 2011-03-10 2012-09-12 Siemens Aktiengesellschaft Detector
WO2013072916A1 (en) 2011-11-16 2013-05-23 Visonic Ltd. Motion detection systems and methodologies
WO2013118111A1 (en) * 2012-02-12 2013-08-15 El-Mul Technologies Ltd. Position sensitive stem detector
US9123222B2 (en) 2012-03-15 2015-09-01 Ninve Jr. Inc. Apparatus and method for detecting tampering with an infra-red motion sensor
TWI509689B (en) * 2013-02-06 2015-11-21 Univ Nat Central Method for fabricating mesa sidewall with spin coated dielectric material and semiconductor element thereof
DE102015114661A1 (en) * 2015-09-02 2017-03-02 Osram Opto Semiconductors Gmbh Optoelectronic component and method for producing an optoelectronic component
US10139281B2 (en) * 2015-12-04 2018-11-27 Amazon Technologies, Inc. Motion detection for A/V recording and communication devices
JP6812936B2 (en) * 2017-09-22 2021-01-13 豊田合成株式会社 Cover device for near infrared sensor
US10304318B1 (en) * 2018-03-19 2019-05-28 Ademco Inc. Anti-masking assembly for intrusion detector and method of detecting application of a masking substance
TWI676052B (en) * 2018-07-16 2019-11-01 國立臺灣科技大學 Far-infrared emitter
US11262244B2 (en) * 2019-06-28 2022-03-01 Orange Peel Projects, Inc. Motion detection system with dual sensor motion detectors
US11475757B1 (en) * 2021-05-18 2022-10-18 Stmicroelectronics S.R.L. Context-aware system and method for IR sensing

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6262661B1 (en) * 1999-10-14 2001-07-17 Siemens Building Technologies, Ag Cerberus Division Passive infrared detector
US20050030180A1 (en) * 2001-09-26 2005-02-10 Math Pantus Surveillance detector

Family Cites Families (82)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2734157A1 (en) 1958-02-22 1979-02-01 Heimann Gmbh PASSIVE INFRARED ALARM
US3524180A (en) * 1967-01-27 1970-08-11 Santa Barbara Res Center Passive intrusion detecting system
US5268680A (en) * 1970-09-08 1993-12-07 Raytheon Company Combined infrared-radar detection system
US3949259A (en) 1973-08-17 1976-04-06 U.S. Philips Corporation Light-transmitting, thermal-radiation reflecting filter
US3958118A (en) * 1975-02-03 1976-05-18 Security Organization Supreme-Sos-Inc. Intrusion detection devices employing multiple scan zones
US4058726A (en) * 1975-08-09 1977-11-15 Cerberus AG, Switzerland Radiation detector
US4055707A (en) * 1975-12-22 1977-10-25 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Selective coating for solar panels
US4048980A (en) * 1976-03-08 1977-09-20 The United States Of America As Represented By The United States Energy Research And Development Administration Solar radiation absorbing material
CH596619A5 (en) * 1976-06-16 1978-03-15 Cerberus Ag
CH596620A5 (en) * 1976-06-21 1978-03-15 Cerberus Ag
DE2734142A1 (en) 1977-07-28 1979-02-08 Heimann Gmbh WARM LIGHT MIRROR AND PROCESS FOR ITS MANUFACTURING
US4225786A (en) * 1978-09-15 1980-09-30 Detection Systems, Inc. Infrared detection system
DE2916768C2 (en) * 1979-04-25 1981-02-19 Heimann Gmbh, 6200 Wiesbaden Optical arrangement for a passive infrared motion detector
US4242669A (en) 1979-05-04 1980-12-30 B. A. Security Systems Limited Passive infrared intruder detection system
US4342987A (en) 1979-09-10 1982-08-03 Rossin Corporation Intruder detection system
US4321594A (en) 1979-11-01 1982-03-23 American District Telegraph Company Passive infrared detector
US4431708A (en) * 1979-12-19 1984-02-14 The United States Of America As Represented By The United States Department Of Energy Annealed CVD molybdenum thin film surface
US4375034A (en) * 1980-07-28 1983-02-22 American District Telegraph Company Passive infrared intrusion detection system
CH650604A5 (en) * 1980-10-24 1985-07-31 Cerberus Ag OPTICAL ARRANGEMENT FOR AN INFRARED BURGLAR DETECTOR.
DE3119720C2 (en) * 1981-05-18 1985-07-11 Richard Hirschmann Radiotechnisches Werk, 7300 Esslingen Motion detector responding to electromagnetic radiation
DE3369019D1 (en) * 1982-10-01 1987-02-12 Cerberus Ag Infrared detector for spotting an intruder in an area
US4594995A (en) * 1982-12-14 1986-06-17 Garrison John D Carbonaceous selective absorber for solar thermal energy collection and process for its formation
US4709153A (en) 1983-06-09 1987-11-24 Shorrock Security Systems Limited Intruder detector
DE3346699A1 (en) * 1983-12-23 1985-07-04 Richard Hirschmann Radiotechnisches Werk, 7300 Esslingen MOTION DETECTOR
US4614938A (en) * 1984-05-21 1986-09-30 Pittway Corporation Dual channel pyroelectric intrusion detector
US4604524A (en) * 1984-10-11 1986-08-05 Yaacov Kotlicki Passive infra-red sensor
FR2574200B1 (en) 1984-11-30 1987-01-23 Labo Electronique Physique DEVICE FOR DETECTING AN INTRUDER PROVIDED WITH AN ANTI-MASKING DEVICE
ATE54768T1 (en) * 1985-01-24 1990-08-15 Cerberus Ag INFRARED INTRUSION DETECTOR.
GB2174224B (en) * 1985-04-15 1988-07-13 Philips Electronic Associated Infra-red intruder detection system
US4751396A (en) * 1986-03-10 1988-06-14 Electronic Key Inc. Infra-red security system
US4787722A (en) * 1986-04-10 1988-11-29 Fresnel Technologies, Inc. Fresnel lens with aspiteric grooves
US4772875A (en) * 1986-05-16 1988-09-20 Denning Mobile Robotics, Inc. Intrusion detection system
WO1988003301A1 (en) 1986-10-31 1988-05-05 Takenaka Engineering Co., Ltd. Passive infrared burglar sensor equipped with visual field interruption monitor mechanism
DE3852431T2 (en) * 1987-06-19 1995-06-29 Sanyo Electric Co Intrusion detector system.
JPH0786537B2 (en) * 1987-09-26 1995-09-20 松下電工株式会社 Human body detection device
DE3802450A1 (en) 1988-01-28 1989-08-10 Standard Elektrik Lorenz Ag CIRCUIT ARRANGEMENT FOR EVALUATING THE OUTPUT SIGNALS OF A PHOTODIODE UNIT
CA1302541C (en) * 1989-08-07 1992-06-02 Shmuel Hershkovitz Integrating passive infrared intrusion detector and method
IT1241278B (en) 1990-10-19 1993-12-29 Elkron Spa ANTI-BLINDING DEVICE FOR COMPONENTS OF SECURITY SYSTEMS.
IT1245405B (en) 1991-02-11 1994-09-20 Bitron Video ANTI-INTRUSION DEVICE
JP2550339Y2 (en) * 1991-06-03 1997-10-08 株式会社村田製作所 Heat source movement detection device
EP0630510B1 (en) * 1992-03-09 1999-12-08 The Commonwealth Of Australia Infrared intrusion sensor
FR2690265B1 (en) 1992-04-17 1994-07-01 Ind Entreprise SYSTEM FOR MONITORING A FURNISHED OR MOBILE OBJECT.
CH684717A5 (en) 1993-03-26 1994-11-30 Cerberus Ag A detector.
US5559496A (en) * 1993-05-19 1996-09-24 Dubats; William C. Remote patrol system
GB2286042B (en) * 1994-01-27 1998-07-29 Security Enclosures Ltd Wide-angle infra-red detection apparatus
EP0707294A1 (en) 1994-10-10 1996-04-17 Cerberus Ag Mirror for an infrared intrusion detector and infrared intrusion detector with a mirror arrangement
IL112396A (en) 1995-01-19 1999-05-09 Holo Or Ltd Intrusion detector
JP3554797B2 (en) 1995-03-03 2004-08-18 竹中エンジニアリング株式会社 Infrared detector
US5973594A (en) * 1995-03-29 1999-10-26 Hubbell Incorporated Multiple optical designs for a multifunction sensor
US5570079A (en) * 1995-04-24 1996-10-29 Dockery; Devan Home security system for detecting an intrusion into a monitored area by an infrared detector
KR0151302B1 (en) * 1995-07-13 1998-12-15 구자홍 Sensor and sensing method by using infrared rays for place judgement
JP3086406B2 (en) * 1995-10-04 2000-09-11 オプテックス株式会社 Passive infrared human body detector
IL119372A (en) * 1995-11-03 2000-02-17 Siemens Building Tech Ag Passive infrared intruder detector
JP3163242B2 (en) 1996-01-18 2001-05-08 富士通株式会社 Anti-theft device and anti-theft method
US5693943A (en) * 1996-05-02 1997-12-02 Visionic Ltd. Passive infrared intrusion detector
US5929445A (en) * 1996-09-13 1999-07-27 Electro-Optic Technologies, Llc Passive infrared detector
US6078253A (en) * 1997-02-04 2000-06-20 Mytech Corporation Occupancy sensor and method of operating same
US5986357A (en) * 1997-02-04 1999-11-16 Mytech Corporation Occupancy sensor and method of operating same
NL1005660C2 (en) * 1997-03-27 1998-09-29 Aritech Bv Motion detection system.
US5834765A (en) 1997-07-08 1998-11-10 Ledalite Architectural Products, Inc. Integral ambient light and occupancy sensor having a linear array of sensor element and a segmented slit aperture device
JP3695096B2 (en) * 1997-10-20 2005-09-14 アツミ電氣株式会社 Hot wire sensor
US6215399B1 (en) * 1997-11-10 2001-04-10 Shmuel Hershkovitz Passive infrared motion detector and method
US6222191B1 (en) * 1997-12-24 2001-04-24 Mytech Corporation Occupancy sensor
IL122846A (en) * 1998-01-04 2003-06-24 Visonic Ltd Passive infra-red intrusion sensing system covering downward zone
US6031456A (en) * 1998-05-13 2000-02-29 Nippon Aleph Corporation Detector
US5963131A (en) 1998-06-19 1999-10-05 Lexent Technologies, Inc. Anti-theft device with alarm screening
US6690018B1 (en) * 1998-10-30 2004-02-10 Electro-Optic Technologies, Llc Motion detectors and occupancy sensors with improved sensitivity, angular resolution and range
IL129551A (en) * 1999-04-22 2002-09-12 Visonic Ltd Optical filter and passive infrared detector assembly
EP1061489B1 (en) 1999-06-07 2004-08-25 Siemens Building Technologies AG Intrusion detector with a device for monitoring against tampering
JP2001228020A (en) 2000-02-18 2001-08-24 Optex Co Ltd Crime prevention sensor with obstruction detecting function
JP2001229473A (en) 2000-02-18 2001-08-24 Optex Co Ltd Crime-preventive sensor with disturbance detecting function
US6756595B2 (en) * 2000-09-11 2004-06-29 Electro-Optic Technologies, Llc Effective quad-detector occupancy sensors and motion detectors
US20020051286A1 (en) 2000-10-27 2002-05-02 Honeywell, Inc. Wavlength specific coating for mirrored optics and method for reducing reflection of white light
GB2370371B (en) * 2000-12-22 2002-11-27 Infrared Integrated Syst Ltd Use of distorting optics in imaging systems
US6653635B2 (en) * 2001-04-25 2003-11-25 Interquartz (Malaysia) Bhd. Representative Office Detector with wide detecting range and method of extending the detecting range
JP2003242566A (en) 2002-02-18 2003-08-29 Optex Co Ltd Invasion detection apparatus
US7755052B2 (en) 2003-03-14 2010-07-13 Suren Systems, Ltd. PIR motion sensor
US20040200955A1 (en) 2003-04-08 2004-10-14 Aleksandr Andzelevich Position detection of a light source
US6886716B2 (en) * 2003-04-09 2005-05-03 Weller Engineering, Inc. Cap with unitary security ring
US7075431B2 (en) 2003-08-18 2006-07-11 Honeywell International Inc. Logical pet immune intrusion detection apparatus and method
US7115871B1 (en) * 2005-08-25 2006-10-03 Inet Consulting Limited Company Field coverage configurable passive infrared radiation intrusion detection device
EP1984904B1 (en) 2006-02-06 2010-07-14 Robert Bosch Gmbh Obstruction detection device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6262661B1 (en) * 1999-10-14 2001-07-17 Siemens Building Technologies, Ag Cerberus Division Passive infrared detector
US20050030180A1 (en) * 2001-09-26 2005-02-10 Math Pantus Surveillance detector

Also Published As

Publication number Publication date
WO2008012805A3 (en) 2009-04-16
GB2453484B (en) 2009-12-02
GB0901320D0 (en) 2009-03-11
US20090302222A1 (en) 2009-12-10
GB2454381A (en) 2009-05-06
WO2008012805A2 (en) 2008-01-31
GB0901327D0 (en) 2009-03-11
GB2454381B (en) 2011-03-02
US8017913B2 (en) 2011-09-13
US20090309029A1 (en) 2009-12-17
WO2008012823A2 (en) 2008-01-31
US7875852B2 (en) 2011-01-25
GB2453484A (en) 2009-04-08

Similar Documents

Publication Publication Date Title
WO2008012823A3 (en) Passive infrared detectors
CN109601019B (en) Method for fire detection based on the scattered light principle and scattered light smoke alarm
EP2844984B1 (en) Smoke detector with external sampling volume
EP1917541B1 (en) Combined radiation dosimeter and rate meter
US11002675B2 (en) System and method of smoke detection using multiple wavelengths of light
CN106413773B (en) For detecting the optical sensor based on absorption of infusion pump cassette
CN108460948B (en) Fire alarm with a measuring chamber and a circuit carrier for the joint arrangement of a fire sensor and at least one further sensor
WO2011131938A8 (en) Smoke detector
EP2002409B1 (en) Infrared intrusion detection device
GB2515429A (en) Tamper detection with an infra-red motion sensor
WO2009005610A1 (en) Look down lens as light diffuser in a passive infrared intrusion detection device
WO2009032166A3 (en) Light sensing pull station
EP3472813B1 (en) Smoke detection method
EP3894837B1 (en) Calibration of an optical detector
US20180059008A1 (en) System and method of smoke detection using multiple wavelengths of light and multiple sensors
GB2314618A (en) Smoke detector using light scatter and extinction
JP5901485B2 (en) smoke detector
JP4315280B2 (en) Flame detector
EP3547278A3 (en) Protective cover for chamberless point sensor
JP5038112B2 (en) Photoelectric smoke detector
DE602006010043D1 (en) intrusion detector
JP2018170625A5 (en)
BR0010874A (en) Optical humidity sensor for unit detection on the surface of a transparent material
US20120301361A1 (en) Portable chemical detector
KR20020023577A (en) infrared sensing apparatus

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07789994

Country of ref document: EP

Kind code of ref document: A2

WWE Wipo information: entry into national phase

Ref document number: 12227274

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 0901327.7

Country of ref document: GB

NENP Non-entry into the national phase

Ref country code: DE

NENP Non-entry into the national phase

Ref country code: RU

122 Ep: pct application non-entry in european phase

Ref document number: 07789994

Country of ref document: EP

Kind code of ref document: A2