DE2541162C3 - Device for determining the nitrogen oxide concentration in a gas mixture - Google Patents

Device for determining the nitrogen oxide concentration in a gas mixture

Info

Publication number
DE2541162C3
DE2541162C3 DE19752541162 DE2541162A DE2541162C3 DE 2541162 C3 DE2541162 C3 DE 2541162C3 DE 19752541162 DE19752541162 DE 19752541162 DE 2541162 A DE2541162 A DE 2541162A DE 2541162 C3 DE2541162 C3 DE 2541162C3
Authority
DE
Germany
Prior art keywords
gas mixture
nitrogen oxide
hollow cathode
cathode lamp
determining
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.)
Expired
Application number
DE19752541162
Other languages
German (de)
Other versions
DE2541162B2 (en
DE2541162A1 (en
Inventor
Dipl.-Phys. Dr. Reimar 6000 Frankfurt Faulhaber
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.)
ABB Training Center GmbH and Co KG
Original Assignee
Hartmann and Braun AG
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 Hartmann and Braun AG filed Critical Hartmann and Braun AG
Priority to DE19752541162 priority Critical patent/DE2541162C3/en
Publication of DE2541162A1 publication Critical patent/DE2541162A1/en
Publication of DE2541162B2 publication Critical patent/DE2541162B2/en
Application granted granted Critical
Publication of DE2541162C3 publication Critical patent/DE2541162C3/en
Expired 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
    • G01N21/17—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
    • G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (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)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Description

Die Erfindung bezieht sich auf eine Vorrichtung zur Bestimmung der Stickoxidkonzentration in einem Gasgemisch mit den im Oberbegriff des Patentanspruchs genannten Merkmaien. Bei einer solchen, aus der DE-AS 2246365 bekannten Vorrichtung wird mittels einer Hohlkathodenlampe erzeugte Stickoxidresonanzstrahlung durch das Gasgemisch geleitet und die Absorption der Strahlung im Gasgemisch als Maß für den Gehalt an Stickcxid gemessen. Die Hohlkathodenlampe ist dabei von Luft mit Unterdruck durchströmt und es wird ein solch geringer Entladungsstrom aufrechterhalten, daß sich die hindurchströmende Luft nicht über Raumtemperatur erwärmt. Eine Durchströmung der Hohlkathodenlampe mit Luft wird für das funktionsgerechte Arbeiten ausdrücklich vorgeschrieben.The invention relates to a device for determining the nitrogen oxide concentration in one Gas mixture with the features mentioned in the preamble of the claim. With one of these, off the device known from DE-AS 2246365 is nitrogen oxide resonance radiation generated by means of a hollow cathode lamp passed through the gas mixture and the absorption of radiation in the gas mixture as a measure measured for the content of stickcxide. The hollow cathode lamp is air with negative pressure flows through and there is such a low discharge current maintained that the flowing through Air not warmed above room temperature. A flow through the hollow cathode lamp with Air is expressly prescribed for proper functioning.

Der Erfindung liegt die Aufgabe zugrunde, die bekannte Vorrichtung für die Belange der Praxis zu verbessern und zu vereinfachen. Die Lösung dieser Aufgabe besteht erfindungsgemäß in den im Kennzeichen des Patentanspruchs genannten Maßnahmen. Die Erfindung beruht dabei auf der Erkenntnis, daß entgegen der bisherigen Meinung ein Durchströmen der Hohlkathodenlampe mit Luft nicht nötig ist.The invention is based on the object of improving the known device for practical purposes and simplify. According to the invention, this object is achieved in the characteristics of the claim mentioned measures. The invention is based on the knowledge that contrary to according to the previous opinion it is not necessary for air to flow through the hollow cathode lamp.

Aufgrund der Erfindung entfallen somit die aufwendigen Einrichtungen zum Durchleiten der Luft durch die Hohlkathodenlampe sowie zur Aufrechterhaltung und Konstanthaltung der Strömung bei erniedrigtem Druck, so daß die Betriebssicherheit der Vorrichtung und ihre Meßgenauigkeit erhöht wird.Due to the invention, the complex devices for passing the air are thus omitted through the hollow cathode lamp as well as to maintain and keep the flow constant when it is lowered Pressure, so that the operational reliability of the device and its measurement accuracy is increased.

Claims (1)

Patentanspruch:Claim: Vorrichtung zur Bestimmung der Stickoxidkonzentration in einem Gasgemisch mitDevice for determining the nitrogen oxide concentration in a gas mixture with a) einer mit Luft bei Unterdruck gefüllten Hohlkathodenlampfe, die bei einem solch geringen Entladestrom betrieben ist, daß sich die Luft nicht über Raumtemperatur erwärmt, a) a hollow cathode lamp filled with air at negative pressure, which in such a low discharge current is operated so that the air does not heat up above room temperature, b) einem Strahlungsdetektor zum Empfang der von der Hohlkathodenlampe emittierten Stickoxidresonanzstrahlung nach Durchgang durch das Gasgemisch,b) a radiation detector for receiving the radiation emitted by the hollow cathode lamp Nitrogen oxide resonance radiation after passing through the gas mixture, dadurch gekennzeichnet, daßcharacterized in that c) die Hohlkathodenlampe vakuumdicht abgeschlossen ist, undc) the hollow cathode lamp is sealed in a vacuum-tight manner, and d) der Druck in der Hohlkathodenlampe 1 bis 5 mbar beträgt.d) the pressure in the hollow cathode lamp is 1 to 5 mbar.
DE19752541162 1975-09-16 1975-09-16 Device for determining the nitrogen oxide concentration in a gas mixture Expired DE2541162C3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19752541162 DE2541162C3 (en) 1975-09-16 1975-09-16 Device for determining the nitrogen oxide concentration in a gas mixture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752541162 DE2541162C3 (en) 1975-09-16 1975-09-16 Device for determining the nitrogen oxide concentration in a gas mixture

Publications (3)

Publication Number Publication Date
DE2541162A1 DE2541162A1 (en) 1977-03-24
DE2541162B2 DE2541162B2 (en) 1980-08-14
DE2541162C3 true DE2541162C3 (en) 1981-05-21

Family

ID=5956557

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752541162 Expired DE2541162C3 (en) 1975-09-16 1975-09-16 Device for determining the nitrogen oxide concentration in a gas mixture

Country Status (1)

Country Link
DE (1) DE2541162C3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4138425C1 (en) * 1991-11-22 1993-02-25 Hartmann & Braun Ag, 6000 Frankfurt, De
DE10036948A1 (en) * 2000-07-28 2002-02-21 Abb Patent Gmbh Measuring nitrogen oxides concentration involves using specific discharge lamp in which electrically rotating filtering or screen wheel is placed in radiation path and controlled

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2246365C3 (en) * 1972-09-21 1975-05-15 Deutsche Forschungs- U. Versuchsanstalt Fuer Luft- Und Raumfahrt E.V., 5300 Bonn Method and device for determining the nitrogen oxide concentration in a gas mixture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4138425C1 (en) * 1991-11-22 1993-02-25 Hartmann & Braun Ag, 6000 Frankfurt, De
DE10036948A1 (en) * 2000-07-28 2002-02-21 Abb Patent Gmbh Measuring nitrogen oxides concentration involves using specific discharge lamp in which electrically rotating filtering or screen wheel is placed in radiation path and controlled

Also Published As

Publication number Publication date
DE2541162B2 (en) 1980-08-14
DE2541162A1 (en) 1977-03-24

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Legal Events

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C3 Grant after two publication steps (3rd publication)