WO2012146330A1 - Messkopf für eine vorrichtung zum messen der konzentration wenigstens eines gases in einer gasprobe - Google Patents
Messkopf für eine vorrichtung zum messen der konzentration wenigstens eines gases in einer gasprobe Download PDFInfo
- Publication number
- WO2012146330A1 WO2012146330A1 PCT/EP2012/000755 EP2012000755W WO2012146330A1 WO 2012146330 A1 WO2012146330 A1 WO 2012146330A1 EP 2012000755 W EP2012000755 W EP 2012000755W WO 2012146330 A1 WO2012146330 A1 WO 2012146330A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal body
- measuring
- gas
- plate
- measuring element
- Prior art date
Links
- 238000005259 measurement Methods 0.000 title abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 101
- 229910052751 metal Inorganic materials 0.000 claims abstract description 86
- 239000002184 metal Substances 0.000 claims abstract description 86
- 230000005291 magnetic effect Effects 0.000 claims abstract description 25
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000001301 oxygen Substances 0.000 claims abstract description 13
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 13
- 239000012528 membrane Substances 0.000 claims description 18
- 230000008859 change Effects 0.000 claims description 9
- 239000000696 magnetic material Substances 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 239000000523 sample Substances 0.000 description 18
- 125000006850 spacer group Chemical group 0.000 description 11
- 230000005298 paramagnetic effect Effects 0.000 description 10
- 238000004026 adhesive bonding Methods 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000003444 anaesthetic effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000002345 respiratory system Anatomy 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 206010002091 Anaesthesia Diseases 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000037005 anaesthesia Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001914 calming effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 238000003958 fumigation Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/18—Investigating or analyzing materials by the use of thermal means by investigating thermal conductivity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
Definitions
- Measuring head for a device for measuring the concentration of at least one
- the invention relates to a measuring head for a device for measuring the concentration of at least one gas in a gas sample.
- the thermal conductivity of paramagnetic gases changes under the influence of magnetic fields.
- the molecules of a paramagnetic gas have a permanent magnetic moment that is aligned in an external magnetic field. This not only leads to a change in the susceptibility and thus to an increase in the magnetic flux, but the orientation of the molecules also limits the possibility of transferring heat energy to adjacent molecules via collisions. This leads to a slight change in the thermal conductivity of the gas. This effect also occurs in a mixture of paramagnetic and other gases. Since the change in the thermal conductivity of a gas mixture depends on the concentration of a paramagnetic gas contained therein, by determining the change in the thermal conductivity of the gas mixture to the proportion, i. H. the concentration of the paramagnetic gas are closed.
- the paramagnetic gases include in particular oxygen and nitrogen oxides.
- paramagnetic gas in particular oxygen, goes out of the
- a modulatable magnetic field source having an air gap
- a modulation source for outputting a modulation signal to the magnetic field source
- an at least partially disposed within the air gap heated by a power source to a working temperature measuring element for emitting a heat flow measurement signal and by a with the measuring element connected filter device for separating Variations in the heat flow measurement signal due to the modulation of the magnetic field, wherein the changing amplitude of the variations due to the gas-specific change in the thermal conductivity is a measure of the proportion of the paramagnetic gas in the gas sample.
- the measurement of the concentration of the paramagnetic gas, in particular oxygen, takes place in the air gap of the electrically modulatable with a measuring gas cuvette
- a corresponding measuring gas cuvette is known, for example, from DE 102 51 130 A1.
- the measuring gas cuvette described there can be arranged, for example, in a measuring head described in DE 102 41 244 C1.
- a measuring element is mounted on a bottom plate and a channel plate is for the gas flow in the region of
- the measuring gas cuvette is sealed at the top by a cover plate with at least two holes for the gas inlet and outlet. The gas guidance takes place in the
- Measuring element is applied.
- the measuring element is spaced from the bottom plate by spacers and also has a distance from the cover plate.
- gas which has passed horizontally past the measuring element can diffuse into the regions above and below the measuring element. Due to pressure fluctuations or rapid changes in the flow velocity of the gas flowing through the sample gas cuvette, it can lead to the formation of vortices, which are also due to the gas guide also horizontal, d. H. aligned parallel to the bottom plate, so that a uniform fumigation of the
- Measuring element is made difficult by diffusion and it can lead to signal fluctuations. The signal-to-noise ratio is thus impaired.
- the invention has for its object to provide an improved with respect to the measurement signal quality measuring head for a device for measuring the concentration of at least one gas in a gas sample.
- the measuring head according to the invention for a device for measuring the
- Concentration of at least one gas, in particular oxygen, in a gas sample comprises a plate having on one side a measuring element
- Measuring element arranged a first metal body and below the
- Measuring element is disposed under the second side of the plate, a second metal body, wherein the metal body serve during operation of the measuring head as magnetic poles.
- the gas guide in each metal body a channel and an opening formed in the plate, so that the gas sample during operation of the measuring head by one of the metal body and through the opening at one of the opening facing side of the measuring element flow past and can escape through the other metal body again.
- the direction of the gas flow past the measuring element can be adjusted so that the gas flow is carried out substantially perpendicular to the arranged on the plate planar measuring element.
- essentially perpendicular is to be understood as meaning that the flow vector describing the gas flow can be inclined between -6 ° and + 6 °, at least in the area of the opening in the plate, relative to the surface normal of the plate.
- the metal body can be attached to the plate, for example by means of adhesive.
- the plate and the metal body are so indirectly or connected directly to each other so that the metal body gas-tight surround the measuring element and at least the part of the plate covered by the measuring element, so that gas can only pass through the channels to the measuring element.
- Disturbing effects which can occur due to overflow of the measuring element with gas, can be largely avoided by the measuring element is positioned on the plate relative to the gas guide so that gas passes predominantly by diffusion to the measuring element.
- the measuring element partially covers the opening in the plate.
- the measuring element comprises a membrane applied to a support frame, on which the measuring point is arranged, wherein the support frame at least on one of the opening in the plate side facing a cutout with a reduced height has or is interrupted.
- the gas sample can reach the measuring point on the side of the membrane facing the carrier frame, even if the carrier frame rests directly on a surface, in particular on the plate or on the first metal body.
- spacers as used for example in DE 102 51 130 A1 in the assembly of the measuring element can therefore be dispensed with.
- the gap width between the magnetic poles is reduced and the magnetic flux density at the measuring location is increased. This causes an improvement of the signal-to-noise ratio.
- the membrane-carrying side of the measuring element is mounted directly on the plate, the first Metallores abuts on the side facing away from the membrane of the
- Support frame to the measuring element and the second metal body adjacent to the plate.
- a particularly small air gap and thus a particularly high flux density of the magnetic field can be achieved. It can then gas even on both sides of the membrane to the measuring point
- Metal body directly touch the plate. Since the measuring element partially covers the opening of the plate, there is a gap between the membrane and the second metal body in the thickness of the plate, and since the carrier frame on the side facing away from the plate of the measuring element has a section with reduced height or is interrupted first metal body and
- Measuring element an access to the measuring point available.
- first metal body and / or the second metal body are composed of an inner part and an outer part at least partially surrounding the inner part.
- the multi-part structure of the first and / or second metal body allows on the one hand that the channel formed in the first metal body and / or the channel formed in the second metal body advantageously by
- a curved gas guide can be achieved in a precise manner. For example, this can be done by a gas inlet and / or a gas outlet laterally to the metal bodies, while on the from the
- each coil can be arranged, by means of which the magnetic field is generated.
- the multi-part design of the metal body allows the outer part of the first metal body and the outer part of the second metal body advantageously consist of a non-magnetic material.
- the outer parts are designed so that on the one hand the inner parts are well and gastight and on the other hand,
- At least two pins protrude from at least one side of the plate, and the first metal body and / or the second metal body each have at least two bores into which protruding pins are inserted on the respectively adjacent side of the plate.
- the metal bodies can be positioned very accurately relative to the plate and thus relative to the measuring element mounted on the plate.
- the distance between the gas flow passing through the opening and the measuring element can be made so small that the time required for the gas to diffuse to the measuring element is so small that changes in the gas concentration can be detected quickly.
- the distance is such that changes in the
- Milliseconds can be recorded.
- At least the metal body via which the gas supply takes place, is to be positioned by means of pins.
- the metal body lying downstream of the opening in the plate can in principle be positioned with a lower accuracy, so that pins are not compulsory there are required, but also this metal body is preferably positioned by means of at least two pins.
- At least one of the pins is arranged in a hole in the plate in such a way that it protrudes on both sides of the plate.
- the number of pins used to position both metal body may be as small as possible.
- the measuring head according to the invention is used in a device for measuring the concentration of at least one gas, in particular oxygen, in a gas sample in a medical ventilation system.
- the concentration of the oxygen used for ventilation with a high time resolution and as accurately as possible, i. can be determined with a good signal-to-noise ratio.
- Measuring head according to the invention.
- the concentration of any paramagnetic gas in a gas sample can be determined with the measuring head according to the invention.
- Oxygen-mixed gas can be determined simultaneously.
- gas mixtures containing oxygen and helium can be used.
- both the concentration of the oxygen and the helium concentration can be determined with the measuring head according to the invention. The invention will be explained in more detail below with reference to an embodiment shown in FIGS. Show it:
- 1 shows a measuring element with two measuring points for use in one
- FIG. 2 shows a measuring head according to the invention with a measuring element according to FIG.
- Fig. 1 shows schematically a measuring element 1, which is used in the measuring head 9 shown schematically in Figure 2.
- the measuring element 1 comprises a support frame 4, on which an anesthetic-resistant membrane 3
- the measuring element 1 has two juxtaposed measuring points 2a, 2b, each with a
- Heating means 7a, 7b and a heat conduction measuring unit 8a, 8b are provided.
- either the membrane 3a, 3b can be partially removed, for example by etching, or the support frame 4 is partially thinly etched on one side, referred to as the front, so that it has a reduced height and forms cutouts 5a, 5b, which are separated by a web 6.
- cutouts 5a, 5b is a gas access from the front possible.
- the support frame 4 can be removed at the front in the region of the measuring points 2a, 2b, in order to also allow the gas from the front.
- Measuring methods and measuring devices for measuring the concentration of a gas in a gas sample with such a measuring element are described in DE 10 2010 014 883, to which reference is expressly made at this point.
- a measuring element with one measuring point or more than two measuring points can also be used.
- a measuring point is preferably arranged centrally on the measuring element 1, so that the sides of the carrier frame 4 which remain in the region of the measuring point in the case of removal of the carrier frame 4 have the widest possible width and thus are particularly stable.
- Fig. 2 shows schematically a section through a measuring head 9 for a
- the measuring element 1 is attached to the membrane 3 bearing side on the circuit board 11. In this case, the measuring element 1 with a in the circuit board eleventh
- the front of the measuring element 1 and thus the cutouts 5a, 5b point in the direction of the opening 8.
- the attachment of the measuring element 1 to the circuit board 11 is made by contacting the measuring element 1 with the electrical leads 10.
- the electrical leads 10 into the area the opening 18 and thus guided in the region of the measuring element 1 arranged there.
- the course of the electrical lines 10 on or in the circuit board 11 is off
- a first metal body 12, 13 Adjacent to the side facing away from the membrane 3 of the measuring element 1, a first metal body 12, 13 is arranged.
- the first metal body 12, 13 consists of an outer part 13 and an inner part 12 arranged in the outer part 13 in a corresponding recess.
- the inner part 12 is fastened in the outer part 13, for example by gluing, in such a way that over the connecting points between the inner part 12 and outer part 13 no gas can escape or enter.
- a second metal body 14, 15 Adjacent to the underside of the circuit board 11, a second metal body 14, 15 is arranged, which consists of an outer part 15 and a therein in a
- the inner part 14 is fixed, for example, by gluing in the outer part 5 so that on the connection points between the inner part 14 and the outer part 15 no gas can escape or enter.
- a channel 16 is formed, which opens from the top of the circuit board 11 ago in the opening 18.
- a channel 17 is formed, which opens from the bottom of the circuit board 11 ago in the opening 18.
- a gas sample can be guided past the measuring element 1 substantially perpendicularly through the opening 18.
- substantially perpendicular means that, ideally, the gas flow is perpendicular to the surface normal of the plate 11 and thus to the surface normal of the planar measuring element 1 mounted thereon. In this way, signal fluctuations are largely avoided by the vortex, which can arise due to pressure fluctuations or rapid change in the flow velocity, since the vertebrae are also aligned perpendicular to the opening 18 and measuring element 1.
- an ideal vertical gas flow can be deviated by plus or minus 6 °.
- the gas does not flow directly over the measuring element 1, but it passes substantially by diffusion both to the inner part 12 and the inner part 14 facing side of the membrane 3a, 3b. Namely, an air gap is formed between the inner part 12 and the membrane 3a, 3b, in the
- Cutouts 5a, 5b can diffuse gas to the measuring points 2a, 2b. Furthermore, between the applied on the support frame 4 side of the measuring element. 1 and the inner part 14, an air gap formed, which is determined by the thickness of the printed circuit board 11. In this air gap, gas can diffuse to the top of the membrane 3a, 3b.
- the inner part 12 touches the support frame 4 and the inner part 14 touches the underside of the printed circuit board 11. Due to the fact that the first metal body 12, 13 and the second metal body 14, 15, for example, by gluing to each of the circuit board 11 side facing gas-tight with the Printed circuit board 11 are connected, in addition by the height of the splice a small air gap between the measuring element 1 and inner part 12 and printed circuit board 11 and inner part 14 is formed. However, this air gap is compared to the thickness of the
- Measuring element 1 and the thickness of the circuit board 11 negligible, i. Also in this case, the inner part 12 and thus the first metal body 12, 13 adjacent to the measuring element 1 while the inner part 14 and thus the second metal body 14, 15 adjacent to the circuit board 11.
- the air gap between the inner parts 12 and 14 results essentially from the sum of the thickness of the measuring element 1 and the thickness of the printed circuit board 11. In this way, a particularly compact measuring head 9 with the smallest possible air gap between the through the first metal body 12, 13th and the second metal body 14, 15 formed magnetic poles are produced.
- Typical thicknesses of printed circuit boards 11 and measuring elements 1 are in each case in the
- the channels 16, 17 are executed curved in Fig. 2. This is particularly advantageous in that the first metal body 12, 13 and the second Metallgroper 14, 15 were each made of an outer part 13, 15 and an inner part 12, 14 were made. It was in each case in the inner parts 12, 14 and the
- Outer parts 13, 15 formed a recess, so that when joining the parts facing the recesses and the channels 16, 17 form.
- the inner parts 12, 14 are made of a magnetisable metal, so that when arranging the measuring head 9 between two coils, the inner parts 12, 14 can be magnetized and thus in the region of the measuring element 1, a magnetic field can be established.
- the outer parts 13, 15 are made of a non-magnetizable material.
- the outer parts 13, 15 made of aluminum or a
- Induction currents in the electrical lines 10 are avoided or have a negligible effect on the quality of the measuring signal, since the magnetic field through the substantially the size of the measuring element. 1
- Metal body 14, 15 relative to the opening 18 and the measuring element 1 are precisely located so that on the one hand, the gas passes mainly by diffusion to the measuring points 2a, 2b and on the other hand, the distance between the
- Opening 18 facing side of the measuring element 1 and lying in front of the opening 18 edge of the channels 16, 17 is selected so that a change in the gas concentration can be detected for example with a time resolution less than or equal to 500 milliseconds.
- the gas guide can also be vertical through the inner part 12 and / or the inner part 14. Since in operation adjacent to the inner part 12, 14 and outer part 13, 15 each coils for
- Metal body 14, 15 also be made in one piece. In this case are
- first Metallköper 12, 13 and the second metal body 14, 15 made entirely of a ferromagnetic material. Although 10 currents are induced in this case in the electrical lines, but these can in principle by forming corresponding conductor loops on the
- Circuit board 11 can be compensated.
- a spacer 21 made of a non-magnetic material is arranged around the measuring element 1 on the circuit board 11. The thickness of the
- Spacer 21 corresponds substantially to the thickness of the measuring element 1 and the contour of the spacer 21 is substantially the contour of the underside of the outer part 13 is modeled. As a result, the outer part 13 is after the
- the spacer 21 may be attached to the circuit board 11, for example by gluing.
- the measuring head 9 is arranged for operation between two coils for generating a magnetic field, so that the internal parts 12 and 14 are magnetized and a magnetic field is generated in the region of the measuring points 2a, 2b.
- the way in which the magnetic field generated by the coils is to be varied and in a soft manner from the measured signals measured in the measuring element 1 to the concentration of a gas, in particular of oxygen in a gas sample, is not the subject of this application and the person skilled in the art known.
- Corresponding devices and methods are known to the person skilled in the art, for example from DE 100 37 380 A1 and DE 10 2010 014 883.
- the measuring head 9 shown in Fig. 2 can also be provided with a measuring element 1 with a measuring point or more than two measuring points become.
- the measuring head 9 can also be constructed with a larger air gap, for example by the second metal body 14, 15
- the opening 18 is formed only in the region of the channels 16, 17, so that the opening is not overlapped with the measuring element 1, and by the measuring element 1 with the of the membrane.
- the spacer 21 is designed to be 100 ⁇ m to 300 ⁇ m higher than the measuring element 1, so that a corresponding air gap is formed between the measuring element 1 and inner part 12. True, this is
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- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112013023781-3A BR112013023781B1 (pt) | 2011-04-27 | 2012-02-21 | cabeça de medição para um dispositivo para medição da concentração de ao menos um gás em uma amostra de gás |
CN201280020184.7A CN103547913B (zh) | 2011-04-27 | 2012-02-21 | 用于对气体样品中的至少一种气体的浓度测量的装置的测量头 |
US14/113,647 US9360441B2 (en) | 2011-04-27 | 2012-02-21 | Measuring head for a device for measuring the concentration of at least one gas in a gas sample |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011018670A DE102011018670B4 (de) | 2011-04-27 | 2011-04-27 | Messkopf über eine Vorrichtung zum Messen der Konzentration wenigstens eines Gases in einer Gasprobe |
DE102011018670.0 | 2011-04-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012146330A1 true WO2012146330A1 (de) | 2012-11-01 |
Family
ID=45876656
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2012/000755 WO2012146330A1 (de) | 2011-04-27 | 2012-02-21 | Messkopf für eine vorrichtung zum messen der konzentration wenigstens eines gases in einer gasprobe |
Country Status (5)
Country | Link |
---|---|
US (1) | US9360441B2 (de) |
CN (1) | CN103547913B (de) |
BR (1) | BR112013023781B1 (de) |
DE (1) | DE102011018670B4 (de) |
WO (1) | WO2012146330A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014203516A1 (de) * | 2014-02-27 | 2015-08-27 | Schaeffler Technologies AG & Co. KG | Wälzlager mit einer integrierten Winkelmesseinrichtung |
TWI484171B (zh) * | 2014-03-04 | 2015-05-11 | Univ Nat Changhua Education | A method for the determination of fluid concentration by magnetic catalysis |
DE102014017619B4 (de) | 2014-11-28 | 2023-03-23 | Drägerwerk AG & Co. KGaA | Sensormodul für atembare Gasgemische, Beatmungsgerät, Therapiegerät und Verfahren zur Messung mehrerer Gase eines atembaren Gasgemisches |
DE102018006868B4 (de) * | 2018-08-30 | 2020-03-19 | Diehl Metering Gmbh | Messeinrichtung zur Ermittlung der Wärmeleitfähigkeit eines Fluids |
DE102021111431A1 (de) | 2020-06-29 | 2021-12-30 | Dräger Safety AG & Co. KGaA | Überwachungssystem |
DE102021126106A1 (de) | 2021-10-08 | 2023-04-13 | Drägerwerk AG & Co. KGaA | Messsystem zur Bestimmung von Gaskonzentrationen |
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---|---|---|---|---|
US3866461A (en) * | 1970-04-11 | 1975-02-18 | Hartmann & Braun Ag | Para-magnetic gas analyzer |
DE10037380A1 (de) | 1999-10-30 | 2001-05-17 | Draeger Medizintech Gmbh | Vorrichtung und Verfahren zum Messen der Konzentration eines paramagnetischen Gases |
DE10241244C1 (de) | 2002-09-06 | 2003-08-21 | Draeger Medical Ag | Messkopf für eine Vorrichtung zur Messung der Konzentration eines paramagnetischen Gases |
DE10251130A1 (de) | 2002-11-02 | 2004-05-19 | Dräger Medical AG & Co. KGaA | Messgasküvette für eine Vorrichtung zur Messung der Konzentration eines paramagnetischen Gases |
DE102010014883A1 (de) | 2010-04-14 | 2011-10-20 | Dräger Medical GmbH | Vorrichtung zum Messen der physikalischen Eigenschaften von Gasen |
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Publication number | Priority date | Publication date | Assignee | Title |
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NL81406C (de) * | 1949-12-22 | |||
US2903883A (en) * | 1955-02-21 | 1959-09-15 | Onera (Off Nat Aerospatiale) | Devices for measuring the relative amount of a paramagnetic gas in a gaseous mixture |
US3888110A (en) * | 1964-09-18 | 1975-06-10 | Anthony John Clark | Apparatus for the determination of the thermal conductivity of gases |
CN2110874U (zh) | 1992-02-18 | 1992-07-22 | 中国石油化工总公司 | 一种氧化锆测氧传感器 |
GB2355806B (en) * | 1999-10-30 | 2001-12-12 | Draeger Medizintech Gmbh | Device and method for measuring the concentration of a paramagnetic gas |
DE10053314B4 (de) * | 2000-10-27 | 2012-02-09 | Abb Research Ltd. | Vorrichtung zum Messen der Sauertoffkonzentration in Gasen |
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2011
- 2011-04-27 DE DE102011018670A patent/DE102011018670B4/de active Active
-
2012
- 2012-02-21 CN CN201280020184.7A patent/CN103547913B/zh active Active
- 2012-02-21 BR BR112013023781-3A patent/BR112013023781B1/pt active IP Right Grant
- 2012-02-21 WO PCT/EP2012/000755 patent/WO2012146330A1/de active Application Filing
- 2012-02-21 US US14/113,647 patent/US9360441B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3866461A (en) * | 1970-04-11 | 1975-02-18 | Hartmann & Braun Ag | Para-magnetic gas analyzer |
DE10037380A1 (de) | 1999-10-30 | 2001-05-17 | Draeger Medizintech Gmbh | Vorrichtung und Verfahren zum Messen der Konzentration eines paramagnetischen Gases |
DE10241244C1 (de) | 2002-09-06 | 2003-08-21 | Draeger Medical Ag | Messkopf für eine Vorrichtung zur Messung der Konzentration eines paramagnetischen Gases |
DE10251130A1 (de) | 2002-11-02 | 2004-05-19 | Dräger Medical AG & Co. KGaA | Messgasküvette für eine Vorrichtung zur Messung der Konzentration eines paramagnetischen Gases |
DE102010014883A1 (de) | 2010-04-14 | 2011-10-20 | Dräger Medical GmbH | Vorrichtung zum Messen der physikalischen Eigenschaften von Gasen |
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DE102011018670B4 (de) | 2012-12-06 |
BR112013023781B1 (pt) | 2020-10-27 |
BR112013023781A2 (pt) | 2016-12-06 |
US20140041438A1 (en) | 2014-02-13 |
US9360441B2 (en) | 2016-06-07 |
DE102011018670A1 (de) | 2012-10-31 |
CN103547913B (zh) | 2016-05-04 |
CN103547913A (zh) | 2014-01-29 |
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