ClassID:

167984

G01N21/61 - CPC Classification

Classification description:

Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light; Systems in which incident light is modified in accordance with the properties of the material investigated; Transmissivity Non-dispersive gas analysers

Recent Application in this class:
#1
20260133100
2026-05-14

Soil Respiration Device, A System Having Such Devices, and Methods of Using the Systems

#2
20260118268
2026-04-30

ELECTRONIC ARRANGEMENT AND METHOD FOR DETERMINING A PHOTOCURRENT TAKING INTO ACCOUNT A TEMPERATURE DEPENDENCE, AND ALSO AN OPTICAL GAS SENSOR

#3
20260110629
2026-04-23

OZONE CONCENTRATION MEASUREMENT DEVICE, OZONE CONCENTRATION MEASUREMENT METHOD, AND OZONE GENERATION SYSTEM

#4
20250146935
2025-05-08

OPTICAL DENSITY MEASURING APPARATUS

#5
20250085218
2025-03-13

METHODS, APPARATUSES, AND SYSTEMS FOR DIAGNOSING MISALIGNMENT IN GAS DETECTING DEVICES

#6
20250076190
2025-03-06

DIFFERENTIAL MEASUREMENT OF IR ABSORPTION IN PLASMONIC MEMS SENSORS

#7
20240418648
2024-12-19

OPTICAL GAS SENSOR DEVICE, GAS SENSING METHOD AND STORAGE MEDIUM

#8
20240410828
2024-12-12

DEVICE FOR MEASURING THE HUMIDITY IN THE INTERNAL VOLUME OF A WATCH CASE

#9
20240210306
2024-06-27

GAS DETECTION APPARATUS

#10
20240159662
2024-05-16

Optical device

#11
20240027338
2024-01-25

MODULAR LANDFILL GAS MEASUREMENT

#12
20230349814
2023-11-02

GAS DETECTION DEVICE

#13
20230317698
2023-10-05

CHEMICAL SENSOR AND METHOD OF FORMING THE SAME

#14
20230266244
2023-08-24

NDIR SENSOR, SAMPLING METHOD AND SYSTEM FOR BREATH ANALYSIS

#15
20230266238
2023-08-24

Methods, apparatuses, and systems for diagnosing misalignment in gas detecting devices

#16
20230251186
2023-08-10

METHOD AND APPARATUS FOR LONG TERM ACCURATE MEASUREMENT OF AMMONIA GAS CONCENTRATION IN A PERMANENT AMMONIA GAS ENVIRONMENT

#17
20230228679
2023-07-20

OPTICAL MEASUREMENT CELL, OPTICAL ANALYZER, WINDOW FORMING MEMBER, AND METHOD OF MANUFACTURING OPTICAL MEASUREMENT CELL

#18
20230133993
2023-05-04

EMBEDDED OPTICAL FILTER AND ANTI-REFLECTION IMPLEMENTATION WITH METAMATERIALS

#19
20230095478
2023-03-30

Compressed gas cleaning of windows in particle concentration measurement device

#20
20230013716
2023-01-19

Soil Respiration Device, A System Having Such Devices, and Methods of Using the Systems

#21
20220309894
2022-09-29

Smart gas monitoring device

#22
20220244174
2022-08-04

Optical device

#23
20220233097
2022-07-28

SYSTEM AND METHOD FOR MAINSTREAM EXHALED OXYGEN SENSOR

#24
20220215591
2022-07-07

Gas sensor

#25
20220196550
2022-06-23

In mask sensor system

#26
20220187192
2022-06-16

Gas concentration measurement system and airway adapter thereof

#27
20220175271
2022-06-09

WEIGHT LOSS DETECTION AND MONITORING SYSTEM

#28
20220128467
2022-04-28

Detecting and Monitoring Gas Leaks in an Industrial Setting

#29
20220128449
2022-04-28

Gas detection apparatus

#30
20220120666
2022-04-21

Method and device for compensating temperature gradient effects

#31
20220091009
2022-03-24

Gas detecting device

#32
20220045475
2022-02-10

System and method for frequency matching a resonance cavity to a light source

#33
20220034807
2022-02-03

Gas analysis system and gas analysis method

#34
20220026352
2022-01-27

Beam conducting cavity structure, gas sensor and method for production thereof

#35
20220003733
2022-01-06

Blue laser system for measuring nitrogen dioxide concentration in gaseous mixtures

#36
20210382026
2021-12-09

Apparatus for microbial activity detection and inventory management, and process thereof

#37
20210381972
2021-12-09

NDIR sensor, sampling method and system for breath analysis

#38
20210372981
2021-12-02

Method of determining nitrogen dioxide concentration with a tunable blue laser diode

#39
20210372980
2021-12-02

Continuous measurement method for determining NOconcentration

#40
20210372979
2021-12-02

Gas delivery and nitrogen dioxide measurement system

#41
20210333202
2021-10-28

Methods, apparatuses, and systems for diagnosing misalignment in gas detecting devices

#42
20210302308
2021-09-30

DIFFERENTIAL MEASUREMENT OF IR ABORPTION IN PLASMONIC MEMS SENSORS

#43
20210247312
2021-08-12

Gas sensing system having quadric reflective surface

#44
20210247309
2021-08-12

Gas sensing with porous scattering material

#45
20210223173
2021-07-22

Water vapor differential minimization systems and methods for gas exchange measurements of aqueous or water saturated samples

#46
20210199702
2021-07-01

Background suppression for MM-wave spectroscopy

#47
20210159060
2021-05-27

Inline measurement of process gas dissociation using infrared absorption

#48
20210131964
2021-05-06

Remote sensing-based detection system and method for gaseous pollutant from diesel vehicle exhaust

#49
20210116433
2021-04-22

Photonic crystal gas sensor

#50
20210108820
2021-04-15

Refrigerant leak detection

#51
20200378892
2020-12-03

Integrated device for fluid analysis

#52
20200370870
2020-11-26

Apparatus and method for monitoring and controlling a haze level

#53
20200340918
2020-10-29

Light absorbance analysis apparatus and program record medium for recording programs of light absorbance analysis apparatus

#54
20200240972
2020-07-30

Measuring total organic content of source rock

#55
20200191716
2020-06-18

Fire detection system, receiver, and fire detection method

#56
20200182845
2020-06-11

System for nitrogen dioxide gas analysis

#57
20200182844
2020-06-11

NO2 concentration measurment method using multimode laser beam

#58
20200175848
2020-06-04

Fire detection system

#59
20200132595
2020-04-30

Optical cavity for gas sensor and gas sensor having the same

#60
20200116632
2020-04-16

NDIR sensor, sampling method and system for breath analysis

#61
20200088702
2020-03-19

Method of calibrating an electronic nose

#62
20200072739
2020-03-05

NDIR gas sensor and optical device

#63
20200052010
2020-02-13

Multi-sensor optical device for detecting chemical species and manufacturing method thereof

#64
20200003680
2020-01-02

Method for estimating the intensity of a wave emitted by an emitting source

#65
20190383736
2019-12-19

Instrument for measuring airborne particulate matter

#66
20190353594
2019-11-21

GAS SENSOR

#67
20190346366
2019-11-14

Laser gas analyzer

#68
20190331651
2019-10-31

Method of measuring NO2 concentrations with a multimode laser beam

#69
20190242818
2019-08-08

ABSORBANCE METER AND SEMICONDUCTOR MANUFACTURING DEVICE USING ABSORBANCE METER

#70
20190242817
2019-08-08

Two detector gas detection system

#71
20190232096
2019-08-01

EARLY FIRE DETECTION WITH LASER-BASED SENSOR AND 2D INFORMATION MAPPING FOR HIGH CEILING BUILDINGS

#72
20190195778
2019-06-27

Optical cavity for gas sensor and gas sensor having optical cavity

#73
20190162685
2019-05-30

Composite sensor for sensing gas and dust by using single heat source

#74
20190086333
2019-03-21

High-accuracy mid-IR laser-based gas sensor

#75
20190072489
2019-03-07

Gas sensor

#76
20180356337
2018-12-13

Refrigerant analyzer and a method of using the same

#77
20180348121
2018-12-06

Compact optical gas detection system and apparatus

#78
20180321207
2018-11-08

Infrared gas detector with secondary sensor

#79
20180321151
2018-11-08

Inspection system

#80
20180266339
2018-09-20

Methods and systems for a fuel injector

#81
20180259452
2018-09-13

Gas analyzer with low optical noise

#82
20180252640
2018-09-06

Gas concentration sensor with improved accuracy

#83
20180206765
2018-07-26

Insulating a protective cover for a seal to sensor associated with a spacesuit

#84
20180202984
2018-07-19

DISSOLVED GAS SENSOR AND SYSTEM

#85
20180188164
2018-07-05

System and method for determining a concentration of a gas in a container

#86
20180164214
2018-06-14

Detection of fluid absorption spectrum

#87
20180100797
2018-04-12

System and method for determining a concentration of a gas in a container

#88
20180080869
2018-03-22

Gas analysis system and boiler

#89
20180073982
2018-03-15

System for determining abnormality in a monitored area

#90
20180059021
2018-03-01

Electronic devices with environmental sensors

#91
20180011081
2018-01-11

METHOD FOR DETECTING HELICOBACTER PYLORI

#92
20180007968
2018-01-11

GAS SENSING FOR AN AEROSOL DELIVERY DEVICE

#93
20170343419
2017-11-30

Chemical sensor

#94
20170328876
2017-11-16

GAS CONCENTRATION DETECTION DEVICE AND DETECTION METHOD THEREOF

#95
20170290097
2017-10-05

Light emitter devices, photoacoustic gas sensors and methods for forming light emitter devices

#96
20170284936
2017-10-05

Light projection assembly for opacity monitors

#97
20170248517
2017-08-31

High-accuracy mid-IR laser-based gas sensor

#98
20170241904
2017-08-24

Nondispersive infrared gas detection sensor

#99
20170236851
2017-08-17

Multi-sensor optical device for detecting chemical species and manufacturing method thereof

#100
20170234757
2017-08-17

Gas leakage treatment method and aerial vehicle

#101
20170176330
2017-06-22

Gas detector for mobile device including enclosure having interior chamber with audio loudspeaker, sealed loudspeaker opening, ventilation port, and gas sensor

#102
20170146451
2017-05-25

Gas cell for absorption spectroscopy

#103
20170115264
2017-04-27

ANALYSIS APPARATUS FOR ANALYZING A GAS SAMPLE

#104
20170115207
2017-04-27

Gas detector using a Golay cell

#105
20170109581
2017-04-20

AUTOMATED EMISSIONS CAPTURE DETERMINATION

#106
20170102328
2017-04-13

Gas concentration measurement device

#107
20170102325
2017-04-13

Concentration measurement device

#108
20170102324
2017-04-13

Gas concentration measurement device

#109
20170102318
2017-04-13

Gas detector using a golay cell

#110
20170097302
2017-04-06

High-sensitivity gas-mapping 3D imager and method of operation

#111
20170097301
2017-04-06

Method for optimisation of detection wavelengths for multi-gas detection

#112
20170082537
2017-03-23

Gas analysis device

#113
20170067825
2017-03-09

Optical sensor system, optical gas sensor system, particulate sensor system, light emitting apparatus, and image printing apparatus

#114
20170052115
2017-02-23

CpMg concentration measuring device

#115
20170003258
2017-01-05

Method and device for determining the carbon dioxide content in ambient air

#116
20160353710
2016-12-08

Method and apparatus for monitoring nutrition, especially fermentation in a rumen of a ruminant

#117
20160238528
2016-08-18

OPTOPAIRS WITH TEMPERATURE COMPENSABLE ELECTROLUMINESCENCE FOR USE IN OPTICAL GAS ABSORPTION ANALYZERS

#118
20160231244
2016-08-11

Gas sensor

#119
20160178517
2016-06-23

Apparatus and method of gas analysis using laser light

#120
20160169796
2016-06-16

System and method for determining a concentration of a gas in a container

#121
20160153897
2016-06-02

Chlorine dioxide gas concentration measuring apparatus

#122
20160153896
2016-06-02

Laser gas analyzer

#123
20160084985
2016-03-24

Wellbore FTIR gas detection system

#124
20160018376
2016-01-21

Measurement of total organic carbon

#125
20160018330
2016-01-21

Gas-sensor arrangement for detecting target-gas concentration

#126
20150355155
2015-12-10

Method of measuring dissolved methane in seawater

#127
20150338546
2015-11-26

Wellbore FTIR gas detection system

#128
20150308962
2015-10-29

Multi-sensor optical device for detecting chemical species and manufacturing method thereof

#129
20150303321
2015-10-22

Infrared sensor and method for manufacturing same, filter member for infrared sensor, and photocoupler

#130
20150293067
2015-10-15

Beverage diagnostic and preservation devices and methods

#131
20150276590
2015-10-01

Cavity enhanced laser based isotopic gas analyzer

#132
20150226667
2015-08-13

Spectrographic system utilizing a chirped, pulsed optical source

#133
20150192517
2015-07-09

Miniature gas sensor

#134
20150185148
2015-07-02

Gas sensor having micro-package structure and method for making the same

#135
20150129770
2015-05-14

OPTICAL GAS SENSOR

#136
20150129767
2015-05-14

Optical gas sensor

#137
20150103350
2015-04-16

Gas detection system using fiber laser with active feedback compensation by reference cavity

#138
20150102240
2015-04-16

Gas detection system using intracavity fiber laser with loop cavity having saturated absorption fiber

#139
20150089993
2015-04-02

Method for measuring the concentration of a gas component in a measurement gas

#140
20150055135
2015-02-26

Method of sensing nitroaromatic electron accepting compounds using a photovoltaic sensor

#141
20150053861
2015-02-26

Interference-compensating NDIR gas sensor for measuring acetylene

#142
20150021491
2015-01-22

METHOD AND APPARATUS FOR MEASURING CONCENTRATION OF ADVANCED-OXIDATION ACTIVE SPECIES

#143
20140367574
2014-12-18

Shockproof gas sensor

#144
20140346370
2014-11-27

Reflective transparent optical chamber

#145
20140338540
2014-11-20

Exhaust gas flowmeter and exhaust gas analyzing system

#146
20140326048
2014-11-06

System and method for monitoring composition in a sidestream system using a disposable sampling chamber

#147
20140305190
2014-10-16

Mist-containing gas analysis device

#148
20140293283
2014-10-02

Ammonia sensor using wavelength modulation spectroscopy

#149
20140291525
2014-10-02

Variable geometry optical gas detector

#150
20140284222
2014-09-25

Detection Of Synergistic And Additive Trace Gases

#151
20140217292
2014-08-07

ON-BOARD DIESEL EMISSIONS DIAGNOSTIC AND MONITORING SYSTEM

#152
20140211209
2014-07-31

Gas analysis apparatus

#153
20140209800
2014-07-31

NON-DISPERSIVE INFRARED GAS DETECTOR, AND METHOD OF STABILIZING INFRARED EMISSION OF AN INCANDESCENT LAMP

#154
20140204384
2014-07-24

Optical fiber containing graphene oxide and reduced graphene oxide and a gas sensor containing the same

#155
20140192347
2014-07-10

Cavity enhanced laser based isotopic gas analyzer

#156
20140152977
2014-06-05

SENSOR COMPONENT FOR AN OPTICAL FLOW RATE SENSOR

#157
20140132416
2014-05-15

Device and system for gas leakage detection and alarm

#158
20140131582
2014-05-15

Method and system for determining energy content and detecting contaminants in a fluid stream

#159
20140131581
2014-05-15

Gas detection system and radiation emitting device for the gas detection system

#160
20140124673
2014-05-08

MEASURING SYSTEM FOR MEASURING THE CO2 CONCENTRATION IN A CLIMATE CABINET OR AN INCUBATOR

#161
20140124672
2014-05-08

Device with a measurement arrangement for optical measurement of gases and gas mixtures, with compensation of environmental effects

#162
20140092379
2014-04-03

Method and device for measuring gas component concentration inside a glass unit

#163
20140078504
2014-03-20

Optical gas detector

#164
20140078494
2014-03-20

Optical gas detector

#165
20140037506
2014-02-06

NITROGEN OXIDE CONCENTRATION MEASUREMENT DEVICE

#166
20140022542
2014-01-23

Gas analyzer

#167
20130335728
2013-12-19

System and method for monitoring unsaturated zone gas and near-surface atmosphere in real time by using isotope analyzer

#168
20130334423
2013-12-19

Non-dispersive infrared sensor with a reflective diffuser

#169
20130321815
2013-12-05

Gas analysis device

#170
20130313436
2013-11-28

Laser gas analyzer

#171
20130301053
2013-11-14

Extractive continuous ammonia monitoring system

#172
20130276509
2013-10-24

Optical gas analyzer device having means for calibrating the frequency spectrum

#173
20130271751
2013-10-17

Apparatus and method for generating light pulses from LEDs in optical absorption gas sensors

#174
20130258315
2013-10-03

Device for determination of gas concentration

#175
20130221224
2013-08-29

GAS ANALYZER AND OPTICAL UNIT FOR USE THEREIN

#176
20130208280
2013-08-15

Non-dispersive gas analyzer

#177
20130188189
2013-07-25

Apparatus for sensing of chlorine dioxide

#178
20130175450
2013-07-11

Optical chamber module assembly

#179
20130175108
2013-07-11

Method of measuring a chemical vapor concentration

#180
20130166242
2013-06-27

Method of calibrating and calibration apparatus for a moisture concentration measurement apparatus

#181
20130162979
2013-06-27

Measuring Method and Measuring Device for Optical Gas Measurement

#182
20130044314
2013-02-21

Cavity enhanced laser based isotopic gas analyzer

#183
20120330568
2012-12-27

GAS CONCENTRATION CALCULATION DEVICE, GAS CONCENTRATION MEASUREMENT MODULE, AND LIGHT DETECTOR

#184
20120287418
2012-11-15

High-accuracy mid-IR laser-based gas sensor

#185
20120281220
2012-11-08

Actuation and evaluation circuit, measuring device and method for measuring the concentration of a gas

#186
20120260715
2012-10-18

Gas analyzing system

#187
20120173162
2012-07-05

GAS DETECTING SYSTEM AND METHOD THEROF

#188
20120152638
2012-06-21

Method to avert an unlawfully intoxicated driver from operating a vehicle by passive measurement of an ethanol vapor concentration in air

#189
20120078532
2012-03-29

NON-DISPERSIVE INFRARED SENSOR MEASUREMENT SYSTEM AND METHOD

#190
20120049071
2012-03-01

Intrinsically safe improved sensitivity NDIR gas sensor in a can

#191
20110307183
2011-12-15

METHOD FOR THE BACTERIOLOGICAL INVESTIGATION OF A BIOLOGICAL SAMPLE AND RELATIVE DEVICE

#192
20110238334
2011-09-29

ARRANGEMENT RELATED TO A GAS SENSOR

#193
20110149289
2011-06-23

Apparatus for sensing of chlorine dioxide

#194
20110147592
2011-06-23

ARRANGEMENT ADAPTED FOR SPECTRAL ANALYSIS OF SMALL CONCENTRATIONS OF GAS

#195
20110116079
2011-05-19

Optical absorption gas analyser

#196
20110090505
2011-04-21

Quantum infrared sensor and quantum infrared gas concentration meter using the same

#197
20110032514
2011-02-10

Non-dispersive infrared gas analyzer

#198
20100258728
2010-10-14

Saturation filtering NDIR gas sensing methodology

#199
20100134784
2010-06-03

Detector arrangement for a nondispersive infrared gas analyzer and method for the detection of a measuring gas component in a gas mixture by means of such a gas analyzer

#200
20100006761
2010-01-14

Infrared radiation sources, sensors and source combinations, and methods of manufacture

#201
20090284745
2009-11-19

GAS CELL USING TWO PARABOLIC CONCAVE MIRRORS AND METHOD OF PRODUCING GAS SENSOR USING THE SAME

#202
20090236524
2009-09-24

Optical analysis device

#203
20090135415
2009-05-28

Optical cavity for gas sensor

#204
20080308733
2008-12-18

OPTICAL GAS SENSOR

#205
20080277586
2008-11-13

Low-Power Fast Infrared Gas Sensor, Hand Held Gas Leak Detector, and Gas Monitor Utilizing Absorptive-Photo-Acoustic Detection

#206
20080232422
2008-09-25

Laser Radiation Source

#207
20080150740
2008-06-26

METHOD OF PROCESSING AN ANALOG SENSOR SIGNAL IN A GAS SENSOR ARRANGEMENT AND MEASURED VALUE PROCESSING DEVICE

#208
20080035848
2008-02-14

Ultra-high sensitivity NDIR gas sensors

#209
20080011952
2008-01-17

Non-Dispersive Infrared Gas Analyzer

#210
20070279633
2007-12-06

Gas sensor

#211
20070272866
2007-11-29

Gas sensor apparatus

#212
20070221848
2007-09-27

Infrared radiation sources, sensors and source combinations, and methods of manufacture

#213
20070114417
2007-05-24

Method for cross interference correction for correlation spectroscopy

#214
20070101800
2007-05-10

Liquid or gas sensor and method

#215
20070029488
2007-02-08

Simple multi-channel NDIR gas sensors

#216
20070017458
2007-01-25

Gas sensor assembly and measurement method with early warning means

#217
20070007449
2007-01-11

Optical analysis device

#218
20060192967
2006-08-31

Method and apparatus for trace gas detection

#219
20060153740
2006-07-13

Chemical vapor sensor having an active and a passive measurement mode

#220
20060119851
2006-06-08

Method and device for detecting gases by absorption spectroscopy

#221
20060011842
2006-01-19

Gas sensor arrangement with reduced settling time

#222
20050268690
2005-12-08

Method and apparatus for eliminating and compensating thermal transients in gas analyzer

#223
20050259262
2005-11-24

Gas sensor arrangement in an integrated construction

#224
20050012042
2005-01-20

Detection assembly and measuring arrangement for multigas analyzers

#225
17493448
2022-05-31

Resonant, multi-pass cavity for cavity ring-down spectroscopy

#226
16109361
2019-02-19

Method for atomic and molecular sensing

#227
15678052
2018-10-30

Remote gas leakage detection systems using mid-infrared laser

#228
15407095
2018-02-27

Dissolved gas sensor and system

#229
14503939
2015-02-24

Gas detection system using a fiber laser with double-wavelength combination having reference-cavity compensation function

#230
14065943
2014-05-20

Absorption biased single beam NDIR gas sensor

#231
13962278
2014-12-09

Semiconducting organic photovoltaic sensor

#232
13868326
2014-11-25

Fluid properties measurements using wavelength modulation spectroscopy with first harmonic detection