DE19717525A1 - Gas concentration measurement instrument - Google Patents

Gas concentration measurement instrument

Info

Publication number
DE19717525A1
DE19717525A1 DE1997117525 DE19717525A DE19717525A1 DE 19717525 A1 DE19717525 A1 DE 19717525A1 DE 1997117525 DE1997117525 DE 1997117525 DE 19717525 A DE19717525 A DE 19717525A DE 19717525 A1 DE19717525 A1 DE 19717525A1
Authority
DE
Germany
Prior art keywords
gas measuring
refractive material
measurement instrument
gas concentration
optically
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.)
Ceased
Application number
DE1997117525
Other languages
German (de)
Inventor
Wolfgang Dipl Ing Merkel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE1997117525 priority Critical patent/DE19717525A1/en
Publication of DE19717525A1 publication Critical patent/DE19717525A1/en
Ceased legal-status Critical Current

Links

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
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N21/03—Cuvette constructions
    • G01N21/05—Flow-through cuvettes

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Optical Measuring Cells (AREA)

Abstract

A gas measurement member (1) for a gas measurement instrument comprises a hollow spool with one or more windings made of a strong optically refractive material or of a material coating inside. The optically refractive material is preferably gold and the hollow spool preferably consists of metal.

Description

Bei der Messung geringer Gaskonzentrationen von Gasen mit Hilfe der Infra­ rotabsorption oder der Absorption kürzerer Wellenlängen werden entsprechend der zu messenden Gaskonzentration und dem Absorptionskoeffizienten ε- ε ·c·d des zu messenden Gases aus dem Lambert-Beer′schen Gesetz I = I₀·e wobei I₀ die Intensität der ausgesandten Strahlung, I die Intensität der empfangenen Strahlung, c die Gaskonzentration und d die durchstrahlte Weglänge bedeutet, Küvetten mit einer durchstahlten Weglänge bis zu 0,3 m und mehr benötigt. Hier zeigt sich, daß das Bauvolumen eines Gerätes Dimen­ sionen annehmen kann, die für tragbare oder Handgeräte nicht mehr geeignet sind.When measuring low gas concentrations of gases using infrared absorption or the absorption of shorter wavelengths, according to the gas concentration to be measured and the absorption coefficient ε - ε · c · d of the gas to be measured from Lambert-Beer law I = I₀ · e where I₀ the intensity of the radiation emitted, I the intensity of the radiation received, c the gas concentration and d the irradiated path length, requires cuvettes with a path length of up to 0.3 m and more. This shows that the volume of a device can take dimensions that are no longer suitable for portable or handheld devices.

Erfindungsgemäß besteht die Meßküvette aus einer Hohlraumspule mit einer oder mehreren Windungen aus optisch stark refraktivem Material, oder einer einer Hohlraumspule, deren Innenoberfläche mit einem optisch stark refrak­ tivem Material beschichtet ist. Durch Spiegelung wird die eingeführte Strah­ lung I₀ vom Gaseinlaß im Kreis zum Gasauslaß geführt. So kann erfindungsgemäß das Bauvolumen eines Gasmeßgerätes verkleinert werden und damit Kosten gesenkt werden und neuen Anwendungsbereichen zugeführt werden.According to the invention, the measuring cell consists of a cavity coil with a or several turns of optically highly refractive material, or one a cavity coil, the inner surface of which is optically strongly refracted tive material is coated. The introduced beam is reflected lung I₀ led from the gas inlet in a circle to the gas outlet. According to the invention the construction volume of a gas measuring device can be reduced and thus costs are reduced and are brought to new areas of application.

Claims (4)

1. Gasmeßküvette für Gasmeßgeräte, dadurch gekennzeichnet, daß die Gasmeß­ küvette Fig. 1 (1) aus einer Hohlraumspule mit einer oder mehreren Windungen aus optisch stark refraktivem Material besteht, oder deren Innenoberfläche mit einem optisch stark refraktivem Material beschichtet ist.1. Gas measuring cuvette for gas measuring devices, characterized in that the gas measuring cuvette Fig. 1 ( 1 ) consists of a hollow coil with one or more turns of optically highly refractive material, or the inner surface of which is coated with an optically highly refractive material. 2. Gasmeßküvette nach Anspruch 1, dadurch gekennzeichnet, daß das optisch refraktive Material Gold ist.2. Gas measuring cell according to claim 1, characterized in that the optically refractive material is gold. 3. Gasmeßküvette nach Anspruch 1, dadurch gekennzeichnet, daß das optisch refraktive Material aus Beryllium- oder Zirkonfluoriden besteht.3. Gas measuring cell according to claim 1, characterized in that the optically refractive material consists of beryllium or zirconium fluorides. 4. Gasmeßküvette nach Anspruch 1, dadurch gekennzeichnet, daß die Hohl­ raumspule aus Metall besteht.4. Gas measuring cell according to claim 1, characterized in that the hollow space coil made of metal.
DE1997117525 1997-04-25 1997-04-25 Gas concentration measurement instrument Ceased DE19717525A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1997117525 DE19717525A1 (en) 1997-04-25 1997-04-25 Gas concentration measurement instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1997117525 DE19717525A1 (en) 1997-04-25 1997-04-25 Gas concentration measurement instrument

Publications (1)

Publication Number Publication Date
DE19717525A1 true DE19717525A1 (en) 1997-10-02

Family

ID=7827756

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1997117525 Ceased DE19717525A1 (en) 1997-04-25 1997-04-25 Gas concentration measurement instrument

Country Status (1)

Country Link
DE (1) DE19717525A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2623611A1 (en) * 1975-06-30 1977-01-27 Technicon Instr METHOD AND DEVICE FOR PHOTOMETRIC ANALYSIS OF FLUID SAMPLES
DE2650350A1 (en) * 1976-11-03 1978-05-11 Draegerwerk Ag GAS CUVETTE FOR ANALYSIS DEVICE
DE2805972A1 (en) * 1978-02-13 1979-08-16 Werner Prof Dr Ing Adrian DEVICE FOR MEASURING THE CONCENTRATION OF GASES
DE4002631A1 (en) * 1990-01-30 1991-08-01 Rosemount Gmbh & Co Gap absorption spectrum analysis cuvette - has rhodium coating alone or on backing gold and diffusion barrier layers
DE4438244C1 (en) * 1994-10-26 1996-03-07 Frobenius Wolf Dietrich Prof D Gas component concn. in mixture measuring appts. for esp. carbon dioxide in atmos.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2623611A1 (en) * 1975-06-30 1977-01-27 Technicon Instr METHOD AND DEVICE FOR PHOTOMETRIC ANALYSIS OF FLUID SAMPLES
DE2650350A1 (en) * 1976-11-03 1978-05-11 Draegerwerk Ag GAS CUVETTE FOR ANALYSIS DEVICE
DE2805972A1 (en) * 1978-02-13 1979-08-16 Werner Prof Dr Ing Adrian DEVICE FOR MEASURING THE CONCENTRATION OF GASES
DE4002631A1 (en) * 1990-01-30 1991-08-01 Rosemount Gmbh & Co Gap absorption spectrum analysis cuvette - has rhodium coating alone or on backing gold and diffusion barrier layers
DE4438244C1 (en) * 1994-10-26 1996-03-07 Frobenius Wolf Dietrich Prof D Gas component concn. in mixture measuring appts. for esp. carbon dioxide in atmos.

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Legal Events

Date Code Title Description
OAV Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8110 Request for examination paragraph 44
8122 Nonbinding interest in granting licenses declared
8131 Rejection