DE29504089U1 - Continuous measurement of the odorant concentration in gas pressure control stations using an odorant detector - Google Patents
Continuous measurement of the odorant concentration in gas pressure control stations using an odorant detectorInfo
- Publication number
- DE29504089U1 DE29504089U1 DE29504089U DE29504089U DE29504089U1 DE 29504089 U1 DE29504089 U1 DE 29504089U1 DE 29504089 U DE29504089 U DE 29504089U DE 29504089 U DE29504089 U DE 29504089U DE 29504089 U1 DE29504089 U1 DE 29504089U1
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- detector
- gas
- odorant
- measuring
- pressure control
- Prior art date
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- Expired - Lifetime
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- 239000003205 fragrance Substances 0.000 title claims description 20
- 238000005259 measurement Methods 0.000 title claims description 8
- 238000009434 installation Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 claims description 3
- 239000008151 electrolyte solution Substances 0.000 claims description 2
- 238000004880 explosion Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000005192 partition Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000009792 diffusion process Methods 0.000 claims 1
- 230000001771 impaired effect Effects 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 34
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 5
- 239000011521 glass Substances 0.000 description 3
- 210000004379 membrane Anatomy 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 150000002898 organic sulfur compounds Chemical class 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 206010002653 Anosmia Diseases 0.000 description 1
- 241000699670 Mus sp. Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 208000016253 exhaustion Diseases 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/404—Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid, e.g. Clark-type oxygen sensors
- G01N27/4045—Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid, e.g. Clark-type oxygen sensors for gases other than oxygen
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/003—Additives for gaseous fuels
- C10L3/006—Additives for gaseous fuels detectable by the senses
-
- 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
- G01N33/0011—Sample conditioning
-
- 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
- G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
-
- 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
- G01N33/0044—Sulphides, e.g. H2S
-
- 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
- G01N33/0006—Calibrating gas analysers
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Molecular Biology (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
Kontinuierliche Messung der OdoraarenKonsentration in Gasdruckregelstationen mittels Odorentenceceki.orContinuous measurement of odor concentration in gas pressure control stations using Odorentenceceki.or
1. Notwendigkeit der Odorierung1. Necessity of odorization
Die Gase der öffentlichen Gasversorgung (Erdgas, Stadt-, Kokerei-, Ferngas) müssen einen hinreichenden, charakteristischen Geruch haben; denn er bietet die einzige Möglichkeit, ungewollt ausströmendes Gas aus Rohrleitungen, Hausinstallationen und Gasgeräten wahrzunehmen. Das dient in erster Linie der Sicherheit der Gasabnehmer. Sofern die Gase keinen Eigengeruch aufweisen, sind sie zu odorieren. Die dafür verbindliche Vorschrift ist das DVGW-Arbeitsblatt G 280.The gases from the public gas supply (natural gas, town gas, coking plant gas, long-distance gas) must have a sufficient, characteristic smell; this is the only way to detect gas that is leaking out of pipes, domestic installations and gas appliances. This is primarily to ensure the safety of gas consumers. If the gases do not have their own smell, they must be odorized. The binding regulation for this is DVGW worksheet G 280.
Die gebräuchlichen Odoranten sind organische Schwefelverbindungen, die den Anforderungen nach tiefer Geruchsschwelle, Ungiftigkeit und chemischer Beständigkeit genügen.The commonly used odorants are organic sulfur compounds, which meet the requirements of low odor threshold, non-toxicity and chemical resistance.
2. Ursachen des Geruchsverlustes2. Causes of loss of smell
Trotz vorschriftsmäßiger Odorierung kann die Konzentration des Odoranten in der Gasleitung schwanken, weil die Odorantenmoleküle an der Rohrinnenwand und vom Rohrstaub adsorbiert werden. Sie können sogar chemisch zersetzt werden. Es ist deshalb nicht auszuschließen, da/3 das Gas seinen Geruch beim Verbraucher verloren hat. Jahreszeitlich abhängig stellen sich Schwankungen ein: Im Sommer ist die Strömungsgeschwindigkeit in den Rohren, niedrig und die Verweilzeit I,ang.. Somit verbleibt dem Zersetzungsvorgang mehr Zeit als im Winter. Es ist im Sommer demzufolge theoretisch häufiger als im Winter mit einem derartigen Geruchsverlust zu rechnen.Despite proper odorization, the concentration of the odorant in the gas line can fluctuate because the odorant molecules are adsorbed on the inside wall of the pipe and by pipe dust. They can even be chemically decomposed. It cannot therefore be ruled out that the gas has lost its odor by the time it reaches the consumer. Fluctuations occur depending on the season: In summer, the flow rate in the pipes is low and the residence time is long. This means that the decomposition process has more time than in winter. In theory, this type of odor loss can therefore be expected more often in summer than in winter.
3. Meßtechnische Möglichkeiten 3 . Measurement options
In den Gasdruckregelst-tioioen bat es sich als notwendig erwiesen, die Konzentration der Ocoriermittel zu kontrollieren. Normalerweise zieht man Proben in speziellen Behältern (Gasmäuse) Vorort und bringt sie in ein Labor. Sin Teil des Odoranten bleibt dabei durch Adsorption am Glas und in den Schläuchen angelagert. Durch Erhitzen (Thermodesorption) versucht man, den Odoranten daraus vollständig zu entfernen. Die Gasprobe wird anschließend speziellen ortgebundenen Chromatographen aufgegeben. Am verbreitetsten ist gegenwärtig der von Gaz de France entwickelte GasChromatograph MEDOR mit einem schwefelspezifischen Detektor. Dieses Gerät ist allerdings standortgebunden, weil die Detektion selbst in einer Chromsäurelösung stattfindet. Auf,deren Oberfläche sind Elektroden so plaziert, daß sie von der Oberflächenspannung gerade getragen werden. Wird die Anlage bewegt, reißt der Film von der Elektrode ab, und die Messung wird unterbrochen. Man muß deshalb aufwendige Wartungs- und Kalibrieraufgaben in Kauf nehmen.In the gas pressure control stations it has proven necessary to control the concentration of the odorants. Normally, samples are taken in special containers (gas mice) on site and taken to a laboratory. Part of the odorant remains adsorbed on the glass and in the tubes. Heating (thermodesorption) is used to try to completely remove the odorant. The gas sample is then fed into special stationary chromatographs. The most common currently is the MEDOR gas chromatograph developed by Gaz de France with a sulfur-specific detector. However, this device is stationary because the detection itself takes place in a chromic acid solution. Electrodes are placed on the surface in such a way that they are supported by the surface tension. If the system is moved, the film on the electrode tears off and the measurement is interrupted. This means that complex maintenance and calibration work must be carried out.
Am einfachsten bestimmt man die Odorantenkonzentration mit Prüfröhrchen. Sie messen jedoch ungenau, und die angezeigten Verfärbungen können nur zum Anhalt dienen.The easiest way to determine the odorant concentration is with test tubes. However, they do not measure accurately and the discolorations shown can only serve as a guide.
Es fehlt ein für Ex-Zonen zugelassenes Vorort-Gerät, das es erlaubt, die Odorantenkonzentration kontinuierlich zu erfassen.There is no on-site device approved for Ex zones that allows the odorant concentration to be continuously measured.
sfeSt» -:sfeSt» -:
• · · J· · J
4. Lösungskonzept4. Solution concept
Um das Ma/3 der Odorierung Vorort, d.h. in der Gasdruckregelstation überprüfen zu können, wird in die Me/3leitung ein Sensor eingebaut, der ähnlich den Druck- und Temperaturdetektoren oder den Quantometern die Konzentration des Odoranten kontinuierlich anzeigt. Dafür eignet sich die Detektion mit elektrochemischer Zelle (Fig. 1 und 2). Sie mu/3 allerdings eine sehr große Membrane (6) haben. Erfahrungsgemäß ist die Fläche der Elektroden im Elektrolyt (7) maßgebend für die Genauigkeit der Zelle.In order to be able to check the level of odorization on site, i.e. in the gas pressure control station, a sensor is installed in the measuring line which, similar to pressure and temperature detectors or quantometers, continuously displays the concentration of the odorant. Detection with an electrochemical cell is suitable for this (Fig. 1 and 2). However, it must have a very large membrane (6). Experience has shown that the area of the electrodes in the electrolyte (7) is decisive for the accuracy of the cell.
4.1. Detektion mit einer speziellen elektrochemischen Zelle großen Volumens4.1. Detection with a special large-volume electrochemical cell
Auf dem Markt werden verschiedene Meßzellen für Schwefelwasserstoff (H2S) angeboten. Sie weisen aber eine Querempfindlichkeit gegenüber organischen Schwefelverbindungen auf. Problematisch ist ebenso nach wie vor die Reproduzierbarkeit des Signals. Durch Anlagerung der Odorantenmoleküle an die meisten Materialien kann sich die Nullpunktlage schon nach wenigen Messungen unerträglich verschlechtern. Eine maximale Toleranz von +/- 3% ist jedoch zu fordern, um im Vorort-Bereich noch brauchbare Aussagen treffen zu können. Der beanspruchte Meßbereich ist jedoch klein, bei Erdgas z.B. 0..30 ppm Odorant. Der obige Toleranzbereich macht dann max. +/- 1,0 ppm aus. Eine derartige Stabilität ist nur von elektrochemischen Zellen mit genügend großer aktiver Fläche erreichbar. Fig.2 zeigt den Aufbau einer solchen Zelle. Das runde Teflonoder Glasgehäuse (1), in dem sich der Elektrolyt befindet, besitzt am Deckel den zentrisch angeordneten Anschlußstutzen, in dem sich die Membrane (10) und die Düse (11) befinden. Er ist mit der Gasmeßleitung (12) fest verbunden.Various measuring cells for hydrogen sulfide (H2S) are available on the market. However, they are cross-sensitive to organic sulfur compounds. The reproducibility of the signal is also still problematic. Due to the adhesion of the odorant molecules to most materials, the zero point position can deteriorate unbearably after just a few measurements. However, a maximum tolerance of +/- 3% is required in order to be able to make useful statements in the on-site area. The claimed measuring range is small, however, for natural gas, e.g. 0..30 ppm odorant. The above tolerance range then amounts to a maximum of +/- 1.0 ppm. Such stability can only be achieved by electrochemical cells with a sufficiently large active area. Fig. 2 shows the structure of such a cell. The round Teflon or glass housing (1) containing the electrolyte has a centrally arranged connection piece on the cover in which the membrane (10) and the nozzle (11) are located. It is firmly connected to the gas measuring line (12).
Wichtig für die Konstruktion ist die unmittelbare Kopplung der elektronischen Bauteile (9) wieImportant for the design is the direct coupling of the electronic components (9) such as
- potentiostatische Schaltung- potentiostatic circuit
- Auswertungselektronik ohne/mit MikroController (z.B. Einchip-uC in SMD-Form)- Evaluation electronics without/with microcontroller (e.g. single-chip uC in SMD form)
an der Zelle selbst (Fig.2). Dabei soll die elektronische Schaltung klein und in Hybridtechnik ausgeführt sein oder mindestens aus platzsparenden SMD-Bausteinen bestehen.on the cell itself (Fig.2). The electronic circuit should be small and designed using hybrid technology or at least consist of space-saving SMD components.
Elektrochemische Zellen sind sehr temperaturempfindlich. Sowohl der Nullpunkt als auch die Empfindlichkeit driften im Winter und im Sommer zu unterschiedlichen Werten hin.Electrochemical cells are very sensitive to temperature. Both the zero point and the sensitivity drift to different values in winter and summer.
Vorteilhaft ist aus diesem Grunde eine Temperaturkompensation des Meßsignals direkt in der Meßzelle. Zumindest sind aber die Temperatur kontinuierlich zu erfassen und die Konzentrationswerte mit der gemessenen Temperatur im Prozessor zu korrigieren.For this reason, it is advantageous to compensate the temperature of the measurement signal directly in the measuring cell. At the very least, the temperature must be recorded continuously and the concentration values must be corrected with the measured temperature in the processor.
4.2. Einbau in die Gasmeßleitung4.2. Installation in the gas measuring line
Der Einbau hat nach Fig. 3 zu erfolgen. Diese Einbaulage bietet dem Gasstrom Schutz vor evtl. auslaufender Säure (elektrolytische Lösung) aus der Meßzelle. Auch die in Fig. 4 vorgestellte Variante mit getrennter Gaszufuhr und Gasabfuhr ist verwendbar. Mögliche Ausführungsformen sind komplette Zellen mit Stromversorgung, z.B. Akkumulatoren oder Batterien. Möglich sind aber auch Low-cost-Versionen ohne.eigeae. Str,omvarsornuag. Diese ModuleThe installation must be carried out as shown in Fig. 3. This installation position offers the gas flow protection from any acid (electrolytic solution) leaking out of the measuring cell. The variant shown in Fig. 4 with separate gas supply and gas discharge can also be used. Possible embodiments are complete cells with power supply, e.g. accumulators or batteries. Low-cost versions without their own power supply are also possible. These modules
reite - &Tgr;ride - &Tgr;
müssen den Strom aus einer externen Quelle beziehen ähnlich den bereits aus der Gastechnik bekannten Me/3wertaufnehmern für Druck und Temperatur. Möglich ist sogar eine Variante mit oder ohne LCD, die die jeweilige Konzentration unmittelbar abzulesen erlaubt. Ohne LCD nimmt man Leuchtdioden für die Signalisierung von Grenzwertverletzungen, oder einen seriellen Ausschluß zum Auslesen der gesammelten Meßdaten in einen mobilen Rechner.must draw power from an external source similar to the pressure and temperature sensors already known from gas technology. A version with or without an LCD is even possible, which allows the respective concentration to be read directly. Without an LCD, light-emitting diodes are used to signal limit violations, or a serial output to read the collected measurement data into a mobile computer.
Ein industriemä/Siges 0dorantenme/3gerät mit diesen Ansprüchen zeigt Fig. 5.An industrial antenna device with these requirements is shown in Fig. 5.
Entscheidend für die Anwendung der elektrochemischen Meßzelle unmittelbar in den Meßleitungen der Gasdruckregelstationen ist die Vermeidung von Funkenbildung und die Erwärmung der Bauteile. Ohne Einhaltung der entsprechenden explosionstechnischen Bestimmungen und Beschaffung der notwendigen Zertifikate ist die Aufstellung von Odorantendetektoren in Gasdruckregelstationen unmöglich.The decisive factor for the use of the electrochemical measuring cell directly in the measuring lines of the gas pressure control stations is the avoidance of sparking and heating of the components. Without compliance with the relevant explosion protection regulations and obtaining the necessary certificates, the installation of odorant detectors in gas pressure control stations is impossible.
4.3. Kompensation gegen Schwefelwasserstoff4.3. Compensation against hydrogen sulphide
Im Erdgas kann sich geringfügiger Schwefewasserstoff befinden, der jedoch in der Lage ist, die Anzeige durch Querempfindlichkeit zu stören. Um diese Störung aus dem Wege zu räumen, wirdNatural gas may contain small amounts of hydrogen sulphide, which can, however, interfere with the display due to cross-sensitivity. To eliminate this interference,
- entweder eine Ausfilterung der H2S-Moleküle aus dem Gasstrom,- either filtering out the H2S molecules from the gas stream,
- oder die Benutzung von zwei elektrochemischen Zellen- or the use of two electrochemical cells
empfohlen, die in einer Brückenschaltung untergebracht werden (Fig. 4). Die erste Meßzelle ist dabei mit dem odorierten, die zweite mit dem noch nicht odorierten oder desodorierten Gasstrom in Kontakt. Die Methoden, die ohne Filter arbeiten, haben naturgemäß Vorteile, gegenüber die Erschöpfungsgefahren oder Zwansausteausch bei Filtern.recommended, which are placed in a bridge circuit (Fig. 4). The first measuring cell is in contact with the odorized gas stream, the second with the not yet odorized or deodorized gas stream. The methods that work without filters naturally have advantages over the risk of exhaustion or forced exchange with filters.
Fig. 1 Aufbau einer elektrochemischen MeßzelleFig. 1 Structure of an electrochemical measuring cell
1) Gehäuse (Teflon oder Glas)1) Housing (Teflon or glass)
2) Meßelektrode2) Measuring electrode
3) Temperaturfühler3) Temperature sensor
4) Referenzelektrode4) Reference electrode
5) Arbeitselektrode5) Working electrode
6) Membran6) Membran
7) Elektrolytische Säure7) Electrolytic acid
8) Meßgas mit Odoriermittel8) Measuring gas with odorant
Fig. 2 Mögliche Ausbildung einer großflächigen IndustriemeßzelleFig. 2 Possible design of a large-area industrial measuring cell
9) integrierte elektronische Module (mit Stromversorgung, Microcontroller)9) integrated electronic modules (with power supply, microcontroller)
Fig. 3 Einbaumöglichkeit der Odorantenmeßzelle in die GasleitungFig. 3 Installation option of the odorant measuring cell in the gas line
10) Stauplatte10) Baffle plate
11) Filter gegen Schwefelwasserstoff11) Filter against hydrogen sulphide
12) Gasmeß leitung12) Gas measuring line
13) Gasstrom13) Gas flow
Fig. 4 Einbauvariante mit BrückenschaltungFig. 4 Installation variant with bridge circuit
24 Vergleichsmeßzelle24 Comparison measuring cell
25 Nicht odorierter Gasstrom oder Umgebungsluft25 Non-odorized gas stream or ambient air
Fig. 5 Odorantenmeßgerät in IndustrieformFig. 5 Odor meter in industrial form
14) T-Stück in der Meßleitung14) T-piece in the measuring line
15) Ermeto-Verschraubung15) Ermeto screw connection
16) Gehäuse16) Housing
17) Ein/Ausschalter17) On/off switch
18) Schnittstelle18) Interface
19) LCD-Feld19) LCD panel
20) Tasten20) Buttons
21) Meldeleuchte für Grenzwertverletzungen21) Indicator light for limit violations
22) Trennwand für die Ablenkung des Gasstromes (Stauwand)22) Partition wall for diverting the gas flow (dam wall)
23) Einströmkanal im Anschlußrohr23) Inlet channel in the connecting pipe
Claims (13)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29504089U DE29504089U1 (en) | 1995-03-10 | 1995-03-10 | Continuous measurement of the odorant concentration in gas pressure control stations using an odorant detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29504089U DE29504089U1 (en) | 1995-03-10 | 1995-03-10 | Continuous measurement of the odorant concentration in gas pressure control stations using an odorant detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE29504089U1 true DE29504089U1 (en) | 1996-04-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE29504089U Expired - Lifetime DE29504089U1 (en) | 1995-03-10 | 1995-03-10 | Continuous measurement of the odorant concentration in gas pressure control stations using an odorant detector |
Country Status (1)
| Country | Link |
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| DE (1) | DE29504089U1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITTO20100458A1 (en) * | 2010-05-31 | 2011-12-01 | Eltek Spa | METHOD FOR DETECTING CONCENTRATIONS OF A GAS IN THE ENVIRONMENT, MARKER FOR A GAS AND SENSOR FOR SUCH MARKER. |
| DE102021118737A1 (en) | 2021-07-20 | 2023-01-26 | Westnetz Gmbh | Process and odorization system for odorizing a gas mixture flowing in a gas line |
| DE102021118739A1 (en) | 2021-07-20 | 2023-01-26 | Westnetz Gmbh | Odorization test facility for test odorization of a gas mixture flowing within a gas line |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3992267A (en) * | 1973-10-02 | 1976-11-16 | Energetics Science, Inc. | Electrochemical gas detection method |
| EP0239296A2 (en) * | 1986-03-27 | 1987-09-30 | Land Combustion Limited | Electrochemical sensing of gases |
| DE3728848C2 (en) * | 1987-02-02 | 1989-01-19 | Teledyne Ind | ELECTROCHEMICAL GAS SENSOR |
| DE3921526A1 (en) * | 1989-06-30 | 1991-01-10 | Draegerwerk Ag | DIFFUSION BARRIER WITH TEMPERATURE PROBE FOR AN ELECTROCHEMICAL GAS SENSOR |
| DE3923717A1 (en) * | 1989-07-18 | 1991-01-24 | Draegerwerk Ag | ELECTROCHEMICAL MEASURING CELL FOR DETECTING BLUE ACID OR SULFUR DIOXIDE |
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| DE4230602A1 (en) * | 1992-09-12 | 1994-03-17 | Draegerwerk Ag | Modular electrochemical sensor with enclosed cavity for electrolyte - comprises stack of plastic modules with electrodes defining upper and lower boundaries of cylindrical electrolyte container |
| DE4238337C2 (en) * | 1991-12-11 | 1994-06-23 | Draegerwerk Ag | Electrochemical measuring cell for the determination of ammonia or hydrazine in a test sample |
| US5363690A (en) * | 1992-09-30 | 1994-11-15 | Exidyne Instrumentation Technologies, Inc. | Gas detection apparatus |
| DE4318891A1 (en) * | 1993-06-07 | 1994-12-08 | Mannesmann Ag | Electrochemical gas trace measuring system with function control |
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| DE3923717A1 (en) * | 1989-07-18 | 1991-01-24 | Draegerwerk Ag | ELECTROCHEMICAL MEASURING CELL FOR DETECTING BLUE ACID OR SULFUR DIOXIDE |
| DE4018597A1 (en) * | 1990-06-09 | 1991-12-12 | Draegerwerk Ag | MEASURING ELECTRODE FOR AN ELECTROCHEMICAL GAS MEASURING CELL |
| DE4041143C1 (en) * | 1990-12-21 | 1992-03-12 | Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De | Electrochemical sensor for detecting pollutants in gaseous mixt. - consists of chamber contg. acidic electrolyte, 2 layered electrodes, catalyst layer and porous PTFE backing layer |
| DE4238337C2 (en) * | 1991-12-11 | 1994-06-23 | Draegerwerk Ag | Electrochemical measuring cell for the determination of ammonia or hydrazine in a test sample |
| DE4230602A1 (en) * | 1992-09-12 | 1994-03-17 | Draegerwerk Ag | Modular electrochemical sensor with enclosed cavity for electrolyte - comprises stack of plastic modules with electrodes defining upper and lower boundaries of cylindrical electrolyte container |
| US5363690A (en) * | 1992-09-30 | 1994-11-15 | Exidyne Instrumentation Technologies, Inc. | Gas detection apparatus |
| DE4318891A1 (en) * | 1993-06-07 | 1994-12-08 | Mannesmann Ag | Electrochemical gas trace measuring system with function control |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITTO20100458A1 (en) * | 2010-05-31 | 2011-12-01 | Eltek Spa | METHOD FOR DETECTING CONCENTRATIONS OF A GAS IN THE ENVIRONMENT, MARKER FOR A GAS AND SENSOR FOR SUCH MARKER. |
| DE102021118737A1 (en) | 2021-07-20 | 2023-01-26 | Westnetz Gmbh | Process and odorization system for odorizing a gas mixture flowing in a gas line |
| DE102021118739A1 (en) | 2021-07-20 | 2023-01-26 | Westnetz Gmbh | Odorization test facility for test odorization of a gas mixture flowing within a gas line |
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