DE29813981U1 - Device for continuous measurement of the dust concentration in exhaust air, exhaust gas ducts and chimneys - Google Patents
Device for continuous measurement of the dust concentration in exhaust air, exhaust gas ducts and chimneysInfo
- Publication number
- DE29813981U1 DE29813981U1 DE29813981U DE29813981U DE29813981U1 DE 29813981 U1 DE29813981 U1 DE 29813981U1 DE 29813981 U DE29813981 U DE 29813981U DE 29813981 U DE29813981 U DE 29813981U DE 29813981 U1 DE29813981 U1 DE 29813981U1
- Authority
- DE
- Germany
- Prior art keywords
- probe
- probe tube
- measuring
- exhaust gas
- dust concentration
- 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 - Lifetime
Links
- 239000000428 dust Substances 0.000 title claims description 16
- 238000005259 measurement Methods 0.000 title description 9
- 239000000523 sample Substances 0.000 claims description 46
- 238000011156 evaluation Methods 0.000 claims description 11
- 238000009530 blood pressure measurement Methods 0.000 claims description 3
- 238000009529 body temperature measurement Methods 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000012212 insulator Substances 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 244000309464 bull Species 0.000 claims 1
- 239000011810 insulating material Substances 0.000 claims 1
- 239000000463 material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2258—Sampling from a flowing stream of gas in a stack or chimney
-
- 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
- G01N33/0032—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array using two or more different physical functioning modes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N2001/222—Other features
- G01N2001/2223—Other features aerosol sampling devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N2001/2285—Details of probe structures
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Pathology (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Sampling And Sample Adjustment (AREA)
- Measuring Fluid Pressure (AREA)
Description
DR.-ING. JURG^ 5CWMlBt- Efcx3?VTZK%.i j"; PafentaWfelt *### *"* ··"··'DR.-ING. JURG^ 5CWMlBt- Efcx3?VTZK%.ij"; PafentaWfelt * ### *"* ··"··'
European Patent AttorneyEuropean Patent Attorney
Lüneburger Tor 4 D-21073 Hamburg Anmelder: Telefon (040) 76 79 80 80Lüneburger Tor 4 D-21073 Hamburg Applicant: Telephone (040) 76 79 80 80
DURAG INDUSTRIE ELEKTRONIK GMBH & CO KG Telefax (040) 76 79 so 88 DURAG INDUSTRIE ELEKTRONIK GMBH & CO KG Fax (040) 76 79 so 88
22453 Hamburg e-mail: [email protected] 22453 Hamburg e-mail: [email protected]
USt-IdNr.: DE118273487 Bezeichnung: Unser Zeichen / Our ReferenceVAT ID No.: DE118273487 Description: Our Reference
Vorrichtung zur kontinuierlichen Messung der Staubkonzentration in G 986942 DE Abluft-, Abgaskanälen und Schornsteinen ihr zeichen / Your ReferenceDevice for continuous measurement of dust concentration in exhaust air, exhaust gas ducts and chimneys G 986942 DE ihr zeichen / Your Reference
Datum / DateDate
04. August 1998/nn04 August 1998/nn
Die Erfindung betrifft eine Vorrichtung zur kontinuierlichen Messung der Staubkonzentration von Abgas in einem Abluft-, Abgaskanal oder Schornstein mit einer einseitig geschlossenen stabförmigen Meßsonde, die in den Abluft-, Abgaskanal oder Schornstein steckbar und mittels einer Flanschverbindung befestigbar ist und einer mit der Meßsonde verbindbaren Meßwertauswerteeinrichtung.The invention relates to a device for continuously measuring the dust concentration of exhaust gas in an exhaust air, exhaust gas duct or chimney with a rod-shaped measuring probe closed on one side, which can be plugged into the exhaust air, exhaust gas duct or chimney and fastened by means of a flange connection and a measured value evaluation device that can be connected to the measuring probe.
Nach TA Luft sind die Schadstoffemissionen von Feuerungsanlagen zu überwachen. Zur Ermittlung der Schadstoffmasse sind die Konzentration, der Volumenstrom, Druck und die Temperatur zu messen. Es sind Meßsonden zur Bestimmung des Massenstroms bekannt, bei denen nach dem triboelektrischen Meßprinzip die Ladungsübertragung von Staubpartikeln zum Sondenstab gemessen und hierdurch die Anzahl der Partikel im Volumenstrom ermittelt wird. Bekannt sind ferner Volumenstromsonden zur Ermittlung der Geschwindigkeit bzw. der Menge des Abgases, bei denen die Druckdifferenz zwischen zwei Kammern gemessen wird, von denen die eine gegen die Strömungsrichtung gerichtet ist und einen Überdruck und die andere in Strömungsrichtung gerichtet ist und einen Unterdruck aufweist. Ebenso sind Einrichtungen zur Temperaturmessung und des Absolutdruckes im Abgaskanal bekannt, so daß eine auf Normbedingungen umgerechnete Bestimmung der Staubkonzentration und des Massenstromes über den Partikel- und Volumenstrom möglich ist. Um diese Staubkonzentration-Bestimmung durchführen zu können, sind somit vier verschiedene Geräte erforderlich, die über vier unterschiedliche Flansche am Abluft-, Abgaskanal oder Schornstein befestigt werden müssen. Außer dem hohen finanziellen gerätetechnischen und Montageaufwand treten auch oft statische Probleme auf.According to TA Luft, pollutant emissions from combustion plants must be monitored. To determine the pollutant mass, the concentration, volume flow, pressure and temperature must be measured. Measuring probes for determining the mass flow are known, in which the charge transfer from dust particles to the probe rod is measured according to the triboelectric measuring principle and the number of particles in the volume flow is determined. Volume flow probes are also known for determining the speed or quantity of the exhaust gas, in which the pressure difference between two chambers is measured, one of which is directed against the flow direction and has an overpressure and the other is directed in the flow direction and has a negative pressure. Devices for measuring the temperature and the absolute pressure in the exhaust duct are also known, so that a determination of the dust concentration and the mass flow converted to standard conditions is possible using the particle and volume flow. In order to be able to carry out this dust concentration determination, four different devices are required, which must be attached to the exhaust air, exhaust gas duct or chimney using four different flanges. In addition to the high financial costs of the equipment and installation, static problems often arise.
Dresdner Bank (BLZ 200 800 00) Konto-Nr. 1 020 080 00 G986942 DOC Dresdner Bank (bank code 200 800 00) Account No. 1 020 080 00 G986942 DOC
Die Aufgabe der Erfindung besteht darin, eine Vorrichtung der eingangs genannten Art so auszubilden, daß mit nur einer stabförrriigen Meßsonde eine sichere und genaue kontinuierliche Messung der Staubkonzentration und des Massenstromes von Abgas möglich ist.The object of the invention is to design a device of the type mentioned above in such a way that a safe and precise continuous measurement of the dust concentration and the mass flow of exhaust gas is possible with only one rod-shaped measuring probe.
Erfindungsgemäß erfolgt die Lösung der Aufgabe durch die Merkmale des Anspruchs 1. Vorteilhafte Ausgestaltungen der Erfindung werden in den abhängigen Ansprüchen beschrieben.According to the invention, the object is achieved by the features of claim 1. Advantageous embodiments of the invention are described in the dependent claims.
Nach der Erfindung ist es möglich, die für die Staub-, Volumenstrom-, Temperatur- und Druckmessung erforderlichen Parameter mit nur einer Meßsonde zu messen, die über nur einen Normflansch am Abluft-, Abgaskanal oder Schornstein montiert wird. Mittels der Meßsonde werden zeit- und ortsgleich die erforderlichen Parameter zur Bestimmung der Staubkonzentration und des Massenstromes erfaßt. Die Staubbelastung wird mittels des triboelektrischen Meßprinzips gemessen. Die Sondenabmessungen werden entsprechend des Kanaldurchmessers dimensioniert. Als Ergebnis der Messungen wird die Staubkonzentration in mg/m3 bzw. mg/Nm3 angezeigt, wenn eine an sich bekannte Kalibrierung durchgeführt ist. Entsprechend den Anwendungsanforderungen kann die Meßsonde aus verschiedenen Materialien hergestellt werden. Der Temperaturfühler mißt zeitgleich ohne Verzögerung die Kerntemperatur im Abgaskanal, was eine Voraussetzung für eine exakte Umrechnung der Staubmeßwerte auf Normbedingungen ist. Entsprechend der Abgastemperaturen können verschiedene Meßfühler eingesetzt werden. Durch Wahl entsprechender Materialien wie z.B. PTFE oder Keramik kann die Meßsonde komplett gegen Erdpotential isoliert aufgebaut sein. Die Sonde selbst ist entsprechend der Abgastemperatur aus verschiedenen Materialien gefertigt, wie Stahl 1.457, Hasteloy u.a. Die Meßwerte der Meßsonde können in vorteilhafter Weise einem Emissions-Auswerterechner oder einer Mikroprozessor-Auswerteeinheit zugeführt und mit diesen Geräten auf Normbedingungen berechnet und klassiert werden. An den Druckausgängen der Kammern der Meßsonde kann ein Umschalthahn vorgesehen werden, der zur Spülung der Kammern und zur Bestimmung des Nullpunktes dient. Es kann auch eine automatische Einheit vorgesehen sein, die zum Abgleich die Steuerung und Beströmung der Meßsonde übernimmt und ggf. die Meßsignale korrigiert. Am Überdruckkanal der Meßsonde kann auch eine Einstelleinrichtung zur symmetrischen Strömungs- und Druckeinstellung angeordnet sein.According to the invention, it is possible to measure the parameters required for dust, volume flow, temperature and pressure measurement with just one measuring probe, which is mounted on the exhaust air, exhaust gas duct or chimney using just one standard flange. The measuring probe records the parameters required to determine the dust concentration and mass flow at the same time and in the same place. The dust load is measured using the triboelectric measuring principle. The probe dimensions are dimensioned according to the duct diameter. The result of the measurements is the dust concentration in mg/m 3 or mg/Nm 3 if a known calibration has been carried out. The measuring probe can be made of different materials depending on the application requirements. The temperature sensor simultaneously measures the core temperature in the exhaust gas duct without delay, which is a prerequisite for an exact conversion of the dust measurement values to standard conditions. Different measuring sensors can be used depending on the exhaust gas temperatures. By choosing appropriate materials such as PTFE or ceramic, the measuring probe can be constructed so that it is completely insulated from earth potential. The probe itself is made of different materials depending on the exhaust gas temperature, such as steel 1.457, Hasteloy, etc. The measured values of the measuring probe can be advantageously fed to an emissions evaluation computer or a microprocessor evaluation unit and calculated and classified using these devices for standard conditions. A changeover valve can be provided on the pressure outlets of the chambers of the measuring probe, which is used to flush the chambers and to determine the zero point. An automatic unit can also be provided, which takes over the control and flow of the measuring probe for calibration and corrects the measurement signals if necessary. An adjustment device for symmetrical flow and pressure adjustment can also be arranged on the overpressure channel of the measuring probe.
Die Erfindung wird nachstehend am Beispiel der in der Zeichnung schematisch dargestellten Meßsonde näher erläutert. Es zeigtThe invention is explained in more detail below using the example of the measuring probe shown schematically in the drawing. It shows
Fig. 1 die Meßsonde in einer schematischen Draufsicht.Fig. 1 the measuring probe in a schematic plan view.
Fig. 2 das Sondenrohr der Meßsonde nach Fig. 1 in einer Seitenansicht im Schnitt.Fig. 2 shows the probe tube of the measuring probe according to Fig. 1 in a side view in section.
Die Vorrichtung 1 zur kontinuierlichen Messung der Staubkonzentration von Abgas besteht aus einer Meßsonde 2 und einer nicht näher dargestellten Meßwertauswerteeinrichtung, die z.B. als Mikroprozessor-Auswerteeinheit oder Emissions-Auswerterechner ausgebildet sein kann. Die Meßsonde 2 weist ein Sondenrohr 3 auf, an dem ein Flansch 4 ausgebildet ist, mittels dem die Meßsonde 2 nach Durchführen durch eine Durchbrechung 6 in der Wand 5 des Abgaskanals an der Wand 5 befestigt wird.The device 1 for continuously measuring the dust concentration of exhaust gas consists of a measuring probe 2 and a measurement value evaluation device (not shown in detail), which can be designed, for example, as a microprocessor evaluation unit or emissions evaluation computer. The measuring probe 2 has a probe tube 3 on which a flange 4 is formed, by means of which the measuring probe 2 is fastened to the wall 5 of the exhaust duct after being passed through an opening 6 in the wall 5.
Das Sondenrohr 3 ist im Querschnitt allgemein trapezförmig ausgebildet. Andere strömungstechnische Profile sind möglich. In dem Sondenrohr 3 ist eine Längswand 7 angeordnet, die zwei Kammern 8, 9 ausbildet. In der Außenwand der Kammern 8, 9 sind im Bereich von den der Längswand 7 abgewandten Spitzen Durchbrechungen 11 entsprechend gültiger VDI-Richtlinien reihenförmig angeordnet. Die eine Kammer 8 ist im Einbauzustand der Messung entgegengesetzt zur Strömungsrichtung 25 des Abgases angeordnet und bildet eine Überdruckkammer. Die andere Kammer 9 ist in Strömungsrichtung 25 des Abgases angeordnet und bildet eine Unterdruckkammer. An der Überdruck aufweisenden Kammer 8 ist eine Einrichtung 29 zur symmetrischen Strömungs- und Druckeinstellung angeordnet. Der in den Abgaskanal ragende Endabschnitt des Sondenrohrs 3 ist verschlossen. Im Bereich des so ausgebildeten Sondenkopfes ist in der Kammer 9 ein Temperaturfühler 15 angeordnet, dessen Meßleitung 26 bis zu einer Durchbrechung 14 in der Wand der Kammer 9 außerhalb des Abgaskanals geführt ist. Die Meßleitung 26 ist durch die Durchbrechung 14 geführt und mit einem Temperaturmeßumformer 23 verbunden. Neben der Durchbrechung 14 befindet sich in der Wand der Kammer 9 eine weitere Durchbrechung 12, an die ein Absolutdruck-Meßumformer 24 angeschlossen ist. In der außenseitigen Stirnfläche des Sondenrohrs 3 ist jeder Kammer 8, 9 zugeordnet ein Rohrstutzen 16, 17 angeordnet, der jeweils eine Durchbrechung 13 zur Kammer 8 bzw. 9 bildet. An jedem Rohrstutzen 16, 17 ist eine Meßleitung 27 angeschlossen, die mit einem Differenzdruck-Meßumformer 21 verbunden ist. Es ist femer am Sondenrohr 3 ein Anschlußstück 19 vorgesehen, das mittels einer Meßleitung 28 mit einem Verstärker 22 zur Messung des Ladungsstromes verbunden ist. Zwischen dem Flansch 4 und dem Sondenrohr 3 ist ein Isolator 20 angeordnet, der das Sondenrohr 3 umgibt.The probe tube 3 is generally trapezoidal in cross-section. Other flow profiles are possible. A longitudinal wall 7 is arranged in the probe tube 3, which forms two chambers 8, 9. In the outer wall of the chambers 8, 9, in the area of the tips facing away from the longitudinal wall 7, openings 11 are arranged in rows in accordance with valid VDI guidelines. In the installed state of the measurement, one chamber 8 is arranged opposite to the flow direction 25 of the exhaust gas and forms a pressure chamber. The other chamber 9 is arranged in the flow direction 25 of the exhaust gas and forms a vacuum chamber. A device 29 for symmetrical flow and pressure adjustment is arranged on the pressure chamber 8. The end section of the probe tube 3 that protrudes into the exhaust gas duct is closed. In the area of the probe head thus formed, a temperature sensor 15 is arranged in the chamber 9, the measuring line 26 of which is guided to an opening 14 in the wall of the chamber 9 outside the exhaust gas duct. The measuring line 26 is guided through the opening 14 and connected to a temperature measuring transducer 23. In addition to the opening 14, there is another opening 12 in the wall of the chamber 9, to which an absolute pressure measuring transducer 24 is connected. In the outside face of the probe tube 3, a pipe socket 16, 17 is arranged for each chamber 8, 9, which forms an opening 13 to the chamber 8 or 9. A measuring line 27 is connected to each pipe socket 16, 17, which is connected to a differential pressure measuring transducer 21. Furthermore, a connector 19 is provided on the probe tube 3, which is connected by means of a measuring line 28 to an amplifier 22 for measuring the charge current. Between the flange 4 and the probe tube 3 there is an insulator 20 which surrounds the probe tube 3.
Die Rohrstutzen 16, 17 können auch mit einem Umschalthahn 18 verbunden sein. Der Verstärker 22, Differenzdruck-Meßumformer 21, Temperatur-Meßumformer 23 und Absolutdruck-Meßumformer 24 sind mit einer nicht näher dargestellten Meßwertauswerteeinrichtung verbunden.The pipe sockets 16, 17 can also be connected to a changeover valve 18. The amplifier 22, differential pressure transducer 21, temperature transducer 23 and absolute pressure transducer 24 are connected to a measurement value evaluation device (not shown in detail).
Claims (14)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29813981U DE29813981U1 (en) | 1998-08-05 | 1998-08-05 | Device for continuous measurement of the dust concentration in exhaust air, exhaust gas ducts and chimneys |
PCT/DE1999/002242 WO2000008452A1 (en) | 1998-08-05 | 1999-07-20 | Device for continuously measuring the dust concentration in exhaust air and waste gas channels and in smokestacks |
DE29912622U DE29912622U1 (en) | 1998-08-05 | 1999-07-20 | Device for the continuous measurement of the dust concentration in exhaust air and exhaust gas ducts and chimneys |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29813981U DE29813981U1 (en) | 1998-08-05 | 1998-08-05 | Device for continuous measurement of the dust concentration in exhaust air, exhaust gas ducts and chimneys |
Publications (1)
Publication Number | Publication Date |
---|---|
DE29813981U1 true DE29813981U1 (en) | 1998-11-19 |
Family
ID=8060864
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE29813981U Expired - Lifetime DE29813981U1 (en) | 1998-08-05 | 1998-08-05 | Device for continuous measurement of the dust concentration in exhaust air, exhaust gas ducts and chimneys |
DE29912622U Expired - Lifetime DE29912622U1 (en) | 1998-08-05 | 1999-07-20 | Device for the continuous measurement of the dust concentration in exhaust air and exhaust gas ducts and chimneys |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE29912622U Expired - Lifetime DE29912622U1 (en) | 1998-08-05 | 1999-07-20 | Device for the continuous measurement of the dust concentration in exhaust air and exhaust gas ducts and chimneys |
Country Status (2)
Country | Link |
---|---|
DE (2) | DE29813981U1 (en) |
WO (1) | WO2000008452A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10022391A1 (en) * | 2000-05-02 | 2001-11-15 | Foedisch Umweltmestechnik Gmbh | Extractive triboelectric measurement of dust and aerosols in gases comprises removing partial gas stream from dust-laden main gas stream, and drawing through tubular triboelectric measuring chamber |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE528151C2 (en) | 2005-01-24 | 2006-09-12 | Calectro Ab | Device for sensing fluid |
EP1842035B1 (en) * | 2005-01-26 | 2014-03-05 | systec Controls Mess- und Regeltechnik GmbH | Dynamic pressure probe |
DE202009002476U1 (en) | 2009-02-20 | 2009-05-20 | Dräger Safety MSI GmbH | probe |
EP3414545B1 (en) * | 2016-02-12 | 2021-06-09 | Leo Breton | Real time fluid species mass flow meter |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1181944B (en) * | 1962-12-06 | 1964-11-19 | Rudolf Prochazka Dr Ing | Device for determining the dust concentration of gases |
FR2164375A5 (en) * | 1971-12-08 | 1973-07-27 | Ikor Inc | |
US4559836A (en) * | 1984-10-17 | 1985-12-24 | Dieterich Standard Corp. | Pitot type flow measuring device and method of mounting |
GB8901238D0 (en) * | 1989-01-20 | 1989-03-15 | Stewart Hughes Ltd | Improvements relating to charge sensors |
US5773726A (en) * | 1996-06-04 | 1998-06-30 | Dieterich Technology Holding Corp. | Flow meter pitot tube with temperature sensor |
DE19634384A1 (en) * | 1996-08-26 | 1998-03-05 | Hosokawa Mikropul Ges Fuer Mah | Device for volume flow and dust emission measurement in pipes and use of this device |
-
1998
- 1998-08-05 DE DE29813981U patent/DE29813981U1/en not_active Expired - Lifetime
-
1999
- 1999-07-20 WO PCT/DE1999/002242 patent/WO2000008452A1/en active Application Filing
- 1999-07-20 DE DE29912622U patent/DE29912622U1/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10022391A1 (en) * | 2000-05-02 | 2001-11-15 | Foedisch Umweltmestechnik Gmbh | Extractive triboelectric measurement of dust and aerosols in gases comprises removing partial gas stream from dust-laden main gas stream, and drawing through tubular triboelectric measuring chamber |
DE10022391C2 (en) * | 2000-05-02 | 2002-03-07 | Foedisch Umweltmestechnik Gmbh | Process and device for extractive triboelectric dust measurement in flowing gases |
Also Published As
Publication number | Publication date |
---|---|
DE29912622U1 (en) | 1999-12-02 |
WO2000008452A1 (en) | 2000-02-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE1964280A1 (en) | Flow meter | |
EP0390941B1 (en) | Probe for sampling hazardous gases from ducts, particularly smoke ducts | |
DE29813981U1 (en) | Device for continuous measurement of the dust concentration in exhaust air, exhaust gas ducts and chimneys | |
DE2517342C3 (en) | Measuring probe | |
DE102017001049A1 (en) | Differential pressure transmitters | |
DE19529544C2 (en) | Arrangement for measuring volume flows of air and other gases loaded in particular with impurities | |
DE19850082B4 (en) | Arrangement of a flue gas sampling probe | |
WO1997010473A1 (en) | Method of monitoring a power firing process in a power station | |
DE3000410C2 (en) | Measuring device for gas concentration measurement | |
DE2163045B2 (en) | ||
DE3621652C1 (en) | Measuring probe for analyzing a gas and using the same | |
DE2405787C3 (en) | Measuring device for a gas flow | |
DE19611463C2 (en) | Measuring device for a gaseous medium | |
DE2106899C3 (en) | Flow measuring device for gaseous media of high temperature | |
AT5949U1 (en) | PRESSURE MONITOR FOR MEASURING THE PRESSURE IN THE COMBUSTION OF AN INTERNAL COMBUSTION ENGINE | |
DE3216613A1 (en) | Calorimetric-electronic measuring system for measuring waste gas velocities | |
DE2757014C3 (en) | Precision thermometer for measuring small changes in temperature | |
DE2416672C3 (en) | Device for measuring a flowing gas sample | |
DE20309694U1 (en) | Flow meter has heater and temperature sensor in single cover | |
DE2655432A1 (en) | DEVICE FOR REMOVING PUSTY SOLID MATERIALS | |
DE8107432U1 (en) | DEVICE FOR IMISSION MEASUREMENT IN THE EXHAUST GAS EXHAUST SYSTEM | |
DE8111208U1 (en) | OXYGEN MEASUREMENT PROBE | |
DE1066312B (en) | Radiant heating tube for industrial furnaces | |
DE2416672B2 (en) | DEVICE FOR MEASURING A FLOWING GAS SAMPLE | |
DE3838074A1 (en) | Measuring device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R207 | Utility model specification |
Effective date: 19990107 |
|
R150 | Utility model maintained after payment of first maintenance fee after three years |
Effective date: 20010808 |
|
R165 | Request for cancellation or ruling filed | ||
R173 | Request for cancellation of utility model refused | ||
R151 | Utility model maintained after payment of second maintenance fee after six years |
Effective date: 20041108 |
|
R152 | Utility model maintained after payment of third maintenance fee after eight years |
Effective date: 20060914 |
|
R071 | Expiry of right |