CN109342348A - A kind of binary channels infrared gas sensor - Google Patents
A kind of binary channels infrared gas sensor Download PDFInfo
- Publication number
- CN109342348A CN109342348A CN201811330370.6A CN201811330370A CN109342348A CN 109342348 A CN109342348 A CN 109342348A CN 201811330370 A CN201811330370 A CN 201811330370A CN 109342348 A CN109342348 A CN 109342348A
- Authority
- CN
- China
- Prior art keywords
- infrared
- curved surface
- binary channels
- reflecting curved
- gas
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims description 4
- 229920006351 engineering plastic Polymers 0.000 claims description 3
- 230000002209 hydrophobic effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 230000005616 pyroelectricity Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 77
- 238000005259 measurement Methods 0.000 description 12
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 3
- 238000004566 IR spectroscopy Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000007634 remodeling Methods 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
Abstract
Binary channels infrared gas sensor provided by the invention, it include: optics gas chamber, optics gas chamber is closed gas chamber, optics gas chamber includes bottom plate and the gas chamber cavity being installed on bottom plate, the opposite sides side of gas chamber cavity is provided with the first reflecting curved surface and the second reflecting curved surface, second reflecting curved surface same side is provided with steering prism, infrared light supply and infrared detector are provided on bottom plate, the light beam of the infrared light supply outgoing is through first reflecting curved surface, it is converged at after the steering prismatic reflection on the photosurface of the infrared detector or the light beam of infrared light supply outgoing is through first reflecting curved surface, it is converged on the photosurface of the infrared detector after second reflecting curved surface and the steering prismatic reflection, measuring beam is completed to converge and be reflected by the first reflecting curved surface and the second reflecting curved surface and steering prism, due to Gas wall is not involved in the reflection of measuring beam, so light path is stablized, using multireflection technique, small size and long light path can be achieved at the same time.
Description
Technical field
The present invention relates to gas sensor technical field more particularly to a kind of binary channels infrared gas sensors.
Background technique
With the rapid industrial development in our country, problem of environmental pollution, danger of especially toxic, harmful hazardous gas to the mankind
Evil also have attracted more and more attention from people, wherein to pernicious gas detection control laboratory solve the problems, such as it is basic.But inspection at present
Measurement equipment is since volume is big, the often calibration of at high cost, needs, and it is impossible to meet people in daily life to gas dangerous in environment
The requirement that physical examination is surveyed enhances people so being badly in need of developing integrated, miniaturization, non-maintaining optical detector and detection system
To the detectability of environment.
Summary of the invention
Have in view of that, it is necessary in view of the defects existing in the prior art, provide a kind of in the long light of small size for guaranteeing gas chamber
Journey simultaneously, realizes the binary channels infrared gas sensor of gas concentration measurement.
To achieve the above object, the present invention adopts the following technical solutions:
A kind of binary channels infrared gas sensor, comprising: optics gas chamber, the optics gas chamber is closed gas chamber, described
Optics gas chamber includes bottom plate and the gas chamber cavity being installed on the bottom plate, and the opposite sides side of the gas chamber cavity is provided with
One reflecting curved surface and the second reflecting curved surface are provided with steering prism with the second reflecting curved surface same side, on the bottom plate
It is provided with infrared light supply and infrared detector, the light beam of the infrared light supply outgoing is through first reflecting curved surface, the steering
It is converged at after prismatic reflection on the photosurface of the infrared detector or the light beam of infrared light supply outgoing is anti-through described first
It is converged on the photosurface of the infrared detector after penetrating curved surface, second reflecting curved surface and the steering prismatic reflection.
In some preferred embodiments, first reflecting curved surface, second reflecting curved surface and the table for turning to prism
Face is coated with high reflection material.
In some preferred embodiments, the infrared detector is binary channels detector, the binary channels detector
Photosurface is provided with narrow band filter slice, wherein the narrow band filter slice being arranged on a photosurface of the binary channels detector
Filter out the light wave that under test gas can absorb；The narrow band filter being arranged on another photosurface filters out stable without gas absorption
Light wave.
In some preferred embodiments, the infrared detector is that pyroelectric infrared detector or infrared thermal reactor detect
Device.
In some preferred embodiments, the central axes of the infrared light supply and infrared detector and the optics gas chamber are equal
For 13.5 ° of angles.
In some preferred embodiments, there are several with extraneous exchanging gas for the side wall of the optics gas chamber and upper wall
Venthole.
In some preferred embodiments, hydrophobic micropore filter membrane is installed at the venthole.
In some preferred embodiments, the surface of the bottom plate and the gas chamber cavity is coated with golden film or chromium film, institute
State the installation site and hole location that circuit control panel is reserved on bottom plate.
It in some preferred embodiments, further include the shell for being covered on the optics gas chamber, the material of the shell is
ABS engineering plastics.
The present invention by adopting the above technical scheme the advantages of be:
Binary channels infrared gas sensor provided by the invention, comprising: optics gas chamber, the optics gas chamber are closed gas
Room, the optics gas chamber include bottom plate and the gas chamber cavity being installed on the bottom plate, the opposite sides side of the gas chamber cavity
It is provided with the first reflecting curved surface and the second reflecting curved surface, the second reflecting curved surface same side is provided with steering prism, institute
State and be provided with infrared light supply and infrared detector on bottom plate, the light beam of infrared light supply outgoing through first reflecting curved surface,
It is converged at after the steering prismatic reflection on the photosurface of the infrared detector or the light beam of infrared light supply outgoing is through institute
The photosensitive of the infrared detector is converged at after stating the first reflecting curved surface, second reflecting curved surface and the steering prismatic reflection
On face, measuring beam is completed to converge and be reflected by the first reflecting curved surface and the second reflecting curved surface and steering prism, due to gas
Wall is not involved in the reflection of measuring beam, so light path is stablized, using multireflection technique, small size and long light can be achieved at the same time
Journey.
In addition, binary channels infrared gas sensor provided by the invention, optics gas chamber side wall and upper wall surface there are with
Several ventholes of extraneous exchanging gas increase atmosphere exchange rate, keep the response of binary channels infrared gas sensor fast, real-time
By force.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram of the gas chamber cavity of binary channels infrared gas sensor provided in an embodiment of the present invention.
Fig. 2 is the structural schematic diagram of binary channels infrared gas sensor bottom plate provided in an embodiment of the present invention.
Fig. 3 is the outline structural diagram of binary channels infrared gas sensor provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1 and Fig. 2 is please referred to, is the structural schematic diagram of binary channels infrared gas sensor provided in an embodiment of the present invention,
It include: optics gas chamber 110, optics gas chamber 110 includes bottom plate 111 and the gas chamber cavity 112 being installed on the bottom plate 111.With
The lower composition that all parts are described in detail.
The opposite sides side of the gas chamber cavity 112 is provided with the first reflecting curved surface 113 and the second reflecting curved surface 114, with
Second reflecting curved surface, 114 same side, which is provided with, turns to prism 115.
In some preferred embodiments, the first reflecting curved surface 113 and the second reflecting curved surface 114 are cylinder, and first is anti-
Penetrating 113 root mean square radii of curved surface is 23.5mm, and 114 root mean square radii of the second reflecting curved surface is 7mm.
In some preferred embodiments, first reflecting curved surface 113, second reflecting curved surface 114 and steering rib
The surface of mirror 115 is coated with high reflection material, to improve reflection efficiency.
Referring again to Fig. 2, infrared light supply 116 and infrared detector 117, infrared light supply 116 are provided on the bottom plate 111
And the distance on 117 installation center of infrared detector to the vertex of the first reflecting curved surface 113 is 17.5mm.
In some preferred embodiments, the infrared light supply 116 include 2.5-15 μm of spectral region, be in infrared base
This vibrating area, the light beam a part issued is by the second reflecting curved surface 114 convergence back reflection to the first reflecting curved surface 113, separately
A part is directly converged by the first reflecting curved surface 131, and two beam convergence light complete 90 ° of light beam reversions by turning to prism 115,
The even receiving plane for converging at infrared detector 117 forms complete measurement optical path.
It is appreciated that measuring beam by the first reflecting curved surface 113 and the second reflecting curved surface 114 and turn to prism 115 come
It completes convergence and reflection, gas wall is not involved in the reflection of measuring beam, so light path is stablized, it, can be simultaneously using multireflection technique
Realize small size and long light path.
In some preferred embodiments, the infrared detector 117 is binary channels detector, the binary channels detector
Photosurface be provided with narrow band filter slice, wherein the narrow-band filtering being arranged on a photosurface of the binary channels detector
Piece filters out the light wave that under test gas can absorb；The narrow band filter being arranged on another photosurface filters out stable without gas suction
The light wave of receipts plays reference and compensating action.
In some preferred embodiments, the infrared detector 117 is pyroelectric infrared detector or infrared thermal reactor
Detector.
It is appreciated that many gases all may generate absorption, and this to infrared spectroscopy due to its intramolecular vibration
Kind absorbs only effective to specific infrared spectroscopy.It absorbs relationship and obeys Lambert-Beer's law:
T=I/Io=10^ (- epsilon × c × L)
T is transmitance, and I is through light intensity, and Io is incident intensity, and epsilon is the delustring system of sample at an absorbing wavelength
Number, c are the substance withdrawl syndrome of sample, and L is the absorption light path of sample.
From the above equation, we can see that can be acquired by measurement as long as guidance passes through the absorption light path and extinction coefficient of under test gas
The concentration of designated gas.Light path is longer, and under test gas absorption light wave is about abundant, and measurement result can be more stable accurate.
When the light velocity passes through the photoelectric signal transformation of infrared detector 117.It is fixed that Lambert-Beer is obeyed according to above-mentioned absorption relationship
Measurement and the relationship of the reference parameters such as two paths of signals and light intensity it is found that the testing principle are restrained, for Measurement channel and tested gas
Bulk concentration has a direct relation, and reference channel and tested gas concentration be without direct relation, but it reflects external environmental condition etc.
Factor.Reference channel will have compensating action to detected gas, improve measurement accuracy and stability.Two paths of signals all direct proportion light
By force, when the indoor tested gas concentration of gas changes, gas molecules sorb radiation will cause the variation of light intensity.
Where it is assumed that the light intensity of Measurement channel is I0 when unimplanted under test gas, the light intensity of reference channel is IR, reference
The light intensity ratio of channel and Measurement channel is K=I0/IR, when needing ingredient and concentration under test gas to test,
Under test gas is injected in gas chamber, at this point, the light intensity of Measurement channel acquisition is I if the light intensity of reference channel acquisition is I'R, then
Unabsorbed light intensity may be considered I'0=k*I'R.So concentration c=m*ln (I0/I)=m*ln (k*I' of under test gas
R ,/I), wherein m is calibration coefficient, and the calibrating gas by injecting known concentration is back-calculated to obtain.
In some preferred embodiments, the infrared light supply 116 and infrared detector 117 and the optics gas chamber 110
Central axes be 13.5 ° of angles.
In some preferred embodiments, the side wall of the optics gas chamber 110 and upper wall there are with extraneous exchanging gas
Several ventholes.Preferably, side thickness 1mm, outer dimension are
28mm(L)x21mm(w)x8.3mm(h)。
It is appreciated that since there are several ventilations with extraneous exchanging gas for the side wall and upper wall of the optics gas chamber 110
Hole keeps gas sensor response fast, strong real-time to increase atmosphere exchange rate.
Further, the side wall of the optics gas chamber 110 and upper wall are the air exchanging hole of 1.5mm there are 3 diameters,
It for installing hydrophobic micropore filter membrane, rises dust-proof there are the rectangle mounting groove of 5mmx8mm depth 0.5mm gas exchanges hole site
It is moisture-proof, increase measurement stability and extends product service life.
The surface of the bottom plate 111 and the gas chamber cavity 112 is coated with golden film or chromium film, reserves on the bottom plate 111
The installation site and hole location of circuit control panel.
Referring to Fig. 3, binary channels infrared gas sensor provided in an embodiment of the present invention further includes being covered on the optics
The shell 120 of gas chamber, the material of the shell 120 are ABS engineering plastics.
It is appreciated that other materials can also be used in practical application, shell 120 and the equal gold-plated film of bottom plate 111 or chromium film, drop
The reflection loss of low measuring beam.
The light beam of binary channels infrared gas sensor provided by the invention, the infrared light supply outgoing is reflected through described first
The light beam that on the photosurface of the infrared detector or the infrared light supply is emitted is converged at after curved surface, the steering prismatic reflection
The infrared detector is converged at after first reflecting curved surface, second reflecting curved surface and the steering prismatic reflection
On photosurface, measuring beam is completed to converge and be reflected by the first reflecting curved surface and the second reflecting curved surface and steering prism, by
It is not involved in the reflection of measuring beam in gas wall, so light path is stablized, using multireflection technique, small size and length can be achieved at the same time
Light path.
Certainly binary channels infrared gas sensor of the invention can also have a variety of transformation and remodeling, it is not limited to above-mentioned
The specific structure of embodiment.In short, protection scope of the present invention should be including those to those skilled in the art
Obvious transformation or substitution and remodeling.
Claims (9)
1. a kind of binary channels infrared gas sensor characterized by comprising optics gas chamber, the optics gas chamber are closed
Gas chamber, the optics gas chamber include bottom plate and the gas chamber cavity being installed on the bottom plate, the opposite sides of the gas chamber cavity
While being provided with the first reflecting curved surface and the second reflecting curved surface, the second reflecting curved surface same side is provided with steering prism,
Infrared light supply and infrared detector are provided on the bottom plate, the light beam of the infrared light supply outgoing is bent through first reflection
It is converged at after face, the steering prismatic reflection on the photosurface of the infrared detector or the light beam of infrared light supply outgoing passes through
The sense of the infrared detector is converged at after first reflecting curved surface, second reflecting curved surface and the steering prismatic reflection
In smooth surface.
2. binary channels infrared gas sensor as described in claim 1, which is characterized in that first reflecting curved surface, described
Second reflecting curved surface and the surface for turning to prism are coated with high reflection material.
3. binary channels infrared gas sensor as described in claim 1, which is characterized in that the infrared detector is binary channels
The photosurface of detector, the binary channels detector is provided with narrow band filter slice, wherein one of the binary channels detector
The narrow band filter slice being arranged on photosurface filters out the light wave that under test gas can absorb；The narrow-band-filter being arranged on another photosurface
Piece filters out the stable light wave absorbed without gas.
4. binary channels infrared gas sensor as claimed in claim 3, which is characterized in that the infrared detector is pyroelectricity
Infrared detector or infrared thermopile detector.
5. binary channels infrared gas sensor as described in claim 1, which is characterized in that the infrared light supply and infrared acquisition
The central axes of device and the optics gas chamber are 13.5 ° of angles.
6. binary channels infrared gas sensor as described in claim 1, which is characterized in that the side wall of the optics gas chamber and upper
There are several ventholes with extraneous exchanging gas for wall.
7. binary channels infrared gas sensor as claimed in claim 6, which is characterized in that be equipped at the venthole hydrophobic
Property micropore filtering film.
8. binary channels infrared gas sensor as described in claim 1, which is characterized in that the bottom plate and the gas chamber cavity
Surface be coated with golden film or chromium film, the installation site and hole location of circuit control panel are reserved on the bottom plate.
9. binary channels infrared gas sensor as described in claim 1, which is characterized in that further include being covered on the optics gas
The shell of room, the material of the shell are ABS engineering plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811330370.6A CN109342348A (en) | 2018-11-09 | 2018-11-09 | A kind of binary channels infrared gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811330370.6A CN109342348A (en) | 2018-11-09 | 2018-11-09 | A kind of binary channels infrared gas sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109342348A true CN109342348A (en) | 2019-02-15 |
Family
ID=65312851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811330370.6A Pending CN109342348A (en) | 2018-11-09 | 2018-11-09 | A kind of binary channels infrared gas sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109342348A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946260A (en) * | 2019-03-27 | 2019-06-28 | 深圳市智水小荷技术有限公司 | Gas concentration detection apparatus and method |
| CN111929267A (en) * | 2020-08-06 | 2020-11-13 | 青岛澳瑞德电子有限公司 | Gas sensor with low power consumption |
| WO2023044803A1 (en) * | 2021-09-24 | 2023-03-30 | 厦门美时美克空气净化有限公司 | Carbon dioxide sensor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6121617A (en) * | 1997-02-26 | 2000-09-19 | Fuji Electric Co., Ltd. | Infrared gas analyzer |
| CN102495003A (en) * | 2011-11-16 | 2012-06-13 | 上海芯敏微系统技术有限公司 | Small long light path infrared gas sensor module |
| CN203396692U (en) * | 2013-07-03 | 2014-01-15 | 戴景民 | Infrared detection device for methane concentration |
| CN204575529U (en) * | 2015-05-13 | 2015-08-19 | 南京信息工程大学 | A kind of range adjustable type gas sensor, sensor-based system |
| CN204789325U (en) * | 2015-07-13 | 2015-11-18 | 南京信息工程大学 | A infrared gas sensor , sensing system for electrical equipment leak testing |
| CN205607852U (en) * | 2016-04-15 | 2016-09-28 | 南京信息工程大学 | Miniaturized linear light journey methane gas sensor based on infrared absorption principle |
| CN108593587A (en) * | 2018-07-03 | 2018-09-28 | 青岛海纳光电环保有限公司 | A kind of non-dispersion infrared gas sensor |
| CN209182234U (en) * | 2018-11-09 | 2019-07-30 | 深圳邺诚科技有限公司 | A kind of binary channels infrared gas sensor |
-
2018
- 2018-11-09 CN CN201811330370.6A patent/CN109342348A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6121617A (en) * | 1997-02-26 | 2000-09-19 | Fuji Electric Co., Ltd. | Infrared gas analyzer |
| CN102495003A (en) * | 2011-11-16 | 2012-06-13 | 上海芯敏微系统技术有限公司 | Small long light path infrared gas sensor module |
| CN203396692U (en) * | 2013-07-03 | 2014-01-15 | 戴景民 | Infrared detection device for methane concentration |
| CN204575529U (en) * | 2015-05-13 | 2015-08-19 | 南京信息工程大学 | A kind of range adjustable type gas sensor, sensor-based system |
| CN204789325U (en) * | 2015-07-13 | 2015-11-18 | 南京信息工程大学 | A infrared gas sensor , sensing system for electrical equipment leak testing |
| CN205607852U (en) * | 2016-04-15 | 2016-09-28 | 南京信息工程大学 | Miniaturized linear light journey methane gas sensor based on infrared absorption principle |
| CN108593587A (en) * | 2018-07-03 | 2018-09-28 | 青岛海纳光电环保有限公司 | A kind of non-dispersion infrared gas sensor |
| CN209182234U (en) * | 2018-11-09 | 2019-07-30 | 深圳邺诚科技有限公司 | A kind of binary channels infrared gas sensor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946260A (en) * | 2019-03-27 | 2019-06-28 | 深圳市智水小荷技术有限公司 | Gas concentration detection apparatus and method |
| CN111929267A (en) * | 2020-08-06 | 2020-11-13 | 青岛澳瑞德电子有限公司 | Gas sensor with low power consumption |
| WO2023044803A1 (en) * | 2021-09-24 | 2023-03-30 | 厦门美时美克空气净化有限公司 | Carbon dioxide sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104122223B (en) | Double-optical-path multi-gas infrared sensor | |
| CN100401041C (en) | Light waveguide absorption type gas sensor and measuring system | |
| US7842243B2 (en) | Chemical sensor with an indicator dye | |
| WO2019228407A1 (en) | Annular multi-point reflective photoelectric gas sensor probe | |
| CN106404705A (en) | High-precision infrared multi-gas detection device | |
| CN109342348A (en) | A kind of binary channels infrared gas sensor | |
| CN203132991U (en) | Movable-part-free multichannel angle modulation type surface plasmon resonance (SPR) sensor detection system | |
| CN106033054B (en) | A kind of laser humiture measurement mechanism and method | |
| CN103528989B (en) | Near infrared moisture measuring instrument | |
| US6989549B2 (en) | Optical gas sensor | |
| US20110310394A1 (en) | Compact Surface Plasmon Resonance Apparatus And Method | |
| CN105973831A (en) | Four-path gas component measurement pyroelectric infrared detector | |
| CN204694626U (en) | Sample measuring device | |
| CN209182234U (en) | A kind of binary channels infrared gas sensor | |
| CN110632008B (en) | Multipoint reflection type photoelectric body sensor probe and photoelectric gas detection device | |
| CN106959171A (en) | Temperature and humidity measurement method based on ultrasonic wave, laser absorption spectroscopy | |
| KR100781968B1 (en) | Variable light-path gas density sensor | |
| CN117309764A (en) | Multi-gas concentration measuring instrument based on integral cavity | |
| CN202092950U (en) | Scaling gas sample cell device in spectral measurement | |
| JP2005337878A (en) | Photoelectric fluid sensor | |
| CN106404695B (en) | Spectrophotometer | |
| CN105319176A (en) | Four-series non-dispersive infrared gas sensor | |
| CN207366101U (en) | A kind of humiture measurement mechanism | |
| CN201917519U (en) | On-site absorption spectrum gas analysis system | |
| CN206515231U (en) | A kind of humidity measuring instrument based on Difference Absorption technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |