DE9208591U1 - Device for measuring or collecting the amount of a gas or solid contained in a liquid - Google Patents
Device for measuring or collecting the amount of a gas or solid contained in a liquidInfo
- Publication number
- DE9208591U1 DE9208591U1 DE9208591U DE9208591U DE9208591U1 DE 9208591 U1 DE9208591 U1 DE 9208591U1 DE 9208591 U DE9208591 U DE 9208591U DE 9208591 U DE9208591 U DE 9208591U DE 9208591 U1 DE9208591 U1 DE 9208591U1
- Authority
- DE
- Germany
- Prior art keywords
- gas
- absorption
- reaction medium
- conductivity
- bgr
- 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
- 239000007788 liquid Substances 0.000 title claims description 9
- 239000007787 solid Substances 0.000 title claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 24
- 239000012429 reaction media Substances 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 3
- 238000007872 degassing Methods 0.000 claims description 2
- 239000000376 reactant Substances 0.000 claims description 2
- 229920002379 silicone rubber Polymers 0.000 claims description 2
- 239000004945 silicone rubber Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 235000011837 pasties Nutrition 0.000 claims 1
- 239000000758 substrate Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 2
- 241000933095 Neotragus moschatus Species 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000011156 evaluation Methods 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
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
- G01N27/08—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid which is flowing continuously
- G01N27/10—Investigation or analysis specially adapted for controlling or monitoring operations or for signalling
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
Vorrichtung zum Messen und Sammeln der Menge eines in einer Flüssigkeit enthaltenen Gasanteils oderDevice for measuring and collecting the quantity of a gas contained in a liquid or
Feststof -F es.Solid -F it.
Vorrichtung zum Bestimmen und Sammeln eines Gasgehaltes oder Sammeln eines Feststoffes unter Verwendung eines gasspezifischen Absorptions- oder Reaktiansmittels, welches durch In—Verbindung—bringen mit dem zu bestimmenden Gas eine Änderung der elektrischen Leitfähigkeit erfährt, sind aus DT-OS 2 315 079 und P 27 45 763.2 bekannt. Die Nachteile des zuerst genannten Verfahrens sind in P 27 45 763.2 beschrieben.Devices for determining and collecting a gas content or collecting a solid using a gas-specific absorption or reaction agent, which undergoes a change in electrical conductivity when brought into contact with the gas to be determined, are known from DT-OS 2 315 079 and P 27 45 763.2. The disadvantages of the first-mentioned method are described in P 27 45 763.2.
Weiterhin ist ein ähnliches Verfahren und eine Vorrichtung aus G 91 04 805.2 und aus der Anmeldung P 42 11 907.3 bekannt. Die Nachteile des letzgenannten Verfahrens liegen in der Benutzung von zwei Leitfähigkeitssensoren und des großen Raumbedarfes der Sensoren, die Leitfähigkeitssensoren haben große Toträume, die zu Schwankungen des Meßergebnisses führen. Diese Schwankungen kommen durch die Durchmischung der zwischen den Elektroden befindlichen Menge an Absorptions- oder Reaktionsmittel zustande. Ebenso nachteilig ist, daß zur Kompensation der Temperatureinflüsse auf das Absorptions— oder Reaktionsmittel entfernt angeordnete Temperaturfühler vorgesehen sind. Es kann nicht die tatsächlich während der Messung auftretende Temperatur des Absorptions— oder Reaktionsmittels erfaßt werden. Zur Erfassung der Leitwertänderung des Absorptions— oder Reaktionsmittels und somit der Menge Gas wird eine Brückenschaltung benutzt. Hier sind einige Fehlerquellen gegeben.Furthermore, a similar method and device are known from G 91 04 805.2 and from the application P 42 11 907.3. The disadvantages of the latter method are the use of two conductivity sensors and the large space required by the sensors; the conductivity sensors have large dead spaces, which lead to fluctuations in the measurement result. These fluctuations are caused by the mixing of the amount of absorption or reaction medium between the electrodes. Another disadvantage is that remotely arranged temperature sensors are provided to compensate for the temperature influences on the absorption or reaction medium. The temperature of the absorption or reaction medium that actually occurs during the measurement cannot be recorded. A bridge circuit is used to record the change in the conductivity of the absorption or reaction medium and thus the amount of gas. There are several sources of error here.
Der als Entgasungszelle genutzte Schlauch hat durch seinen Innendurchmesser bedingt den Nachteil, daß nur ein Teil des Absorptions— oder Reaktionsmittels an der Schlauchwandung zur Aufnahme von eindi-f-fundiertem Gas zur Verfügung steht. Das im Schlauchinneren fließende Absorptions— oder Reaktionsmittel vermischt sich nur unregelmäßig mit der Laminarschicht. Dies führt wiederum zu Schwankungen der Anzeige.The hose used as a degassing cell has the disadvantage, due to its internal diameter, that only a portion of the absorption or reaction medium is available on the hose wall to absorb diffused gas. The absorption or reaction medium flowing inside the hose only mixes irregularly with the laminar layer. This in turn leads to fluctuations in the display.
Die neue Vorrichtung ist nur mit einer Leitfähigkeits— meßzelle ausgestattet. Das Absorptions— oder Reaktionsmittel wird in den Hohlraum des Gehäuses eingepumpt und drückt gleichzeitig verbrauchtes Absorptions- oder Reaktionsmittel aus dem Hohlraum zwischen Leitfähigkeitszelle und Membran hinaus. Der PumpVorgang wird abgebrochen, das Gas hat Gelegenheit in das frische Absorptions- oder Reaktionsmittel einzudiffundieren. Erreicht die Veränderung des Leitwertes ein bestimmtes Maß, wird wieder ein neuer Pumpvorgang mit Füllung des Gehäuses gestartet. Die Zeit zwischen den einzelnen Pumpvorgängen ist somit ein Maß für die Menge des in der Flüssigkeit enthaltenen Gases.The new device is only equipped with a conductivity measuring cell. The absorption or reaction medium is pumped into the cavity of the housing and at the same time presses used absorption or reaction medium out of the cavity between the conductivity cell and the membrane. The pumping process is stopped and the gas has the opportunity to diffuse into the fresh absorption or reaction medium. If the change in the conductivity reaches a certain level, a new pumping process is started and the housing is filled. The time between the individual pumping processes is therefore a measure of the amount of gas contained in the liquid.
PROBLEMPROBLEM
Der im Schutzanspruch 1 angegebenen Erfindung liegt das Problem zugrunde, eine Vorrichtung zu schaffen, die die vorgenannten Nachteile vermeidet und eine verbesserte Messung ermöglicht.The invention specified in claim 1 is based on the problem of creating a device which avoids the aforementioned disadvantages and enables improved measurement.
LÖSUNGSOLUTION
Dieses Problem wird mit den in den Ansprüchen 1 bis 12 aufgeführten Merkmalen gelöst.This problem is solved with the features listed in claims 1 to 12.
Baltu., 8chul«tr.4e,3203 Bornh.l·, &Tgr;·1 · 02227/&bgr;0444| Fall Hi]I1 30. Juni 1 Baltu., 8chul«tr.4e,3203 Bornh.l·, &Tgr;·1 · 02227/&bgr;0444| Case Hi]I 1 30 June 1
Erreichte VorteileBenefits achieved
Die Vorrichtung erlaubt ein einfaches, schnelles Erfassen des in einer Flüssigkeit enthaltenen Gasanteiles. Ferner, daß eine kleine, leicht zu reinigende, elektrodenähnliche, weitgehend wartungsfreie Vorrichtung zur Verfugung steht. Diese Vorrichtung kann auch kleine Probemengen in kleinen Sefäßen messen. Ferner ist eine kleinere Menge an Absorptions- oder Reaktionsmittel zur Messung nötig.The device allows for a simple, quick determination of the gas content in a liquid. Furthermore, a small, easy-to-clean, electrode-like, largely maintenance-free device is available. This device can also measure small sample quantities in small liquid containers. Furthermore, a small amount of absorption or reaction agent is required for the measurement.
1 ti £* &tgr; '-' ·'- ■=■' 1 ti £* &tgr;'-'·'-■=■'
AUSFÜHRUNBSBEISRIELIMPLEMENTATION EXAMPLE
Das Ausführungsbeispiel zeigt die Vorrichtung mit dem Gehäuse (4) und dem darin befindlichen "Fenster" aus Silikonkautschuk (9). Durch den Schlauch (3) wird das Absorptions- oder Reaktionsmittel in den Hohlraum (10) gepumpt. Das Gas diffundiert durch das "Fenster" aus Silikon (9) in den Hohlraum (10) und ändert den Leitwert des Absorptions— oder Reaktionsmittels. Die Änderung wird von dem Leitfähigkeitssensor (6) mit den Elektroden (5 und 8) erfaßt. Die Datenübertragung zur Auswerte- und Steuerelektronik erfolgt über das Kabel (1). Das Absorptions— oder Reaktionsmittel wird nach der Pausenzeit über den Schlauch (2) abgesaugt.The example shows the device with the housing (4) and the "window" made of silicone rubber (9) located therein. The absorption or reaction agent is pumped into the cavity (10) through the hose (3). The gas diffuses through the "window" made of silicone (9) into the cavity (10) and changes the conductivity of the absorption or reaction agent. The change is detected by the conductivity sensor (6) with the electrodes (5 and 8). The data is transmitted to the evaluation and control electronics via the cable (1). The absorption or reaction agent is sucked out via the hose (2) after the pause time.
Bezugszeichenli steList of reference symbols
1) Kabel1) Cable
2) Schlauch für vebrauchtes Absorptions- oder Reakti onsmi ttel2) Hose for used absorption or reaction agent
3) Schlauch für frisches Absorptions- oder Reaktionsmittel3) Hose for fresh absorbent or reactant
4) Gehäuse4) Housing
5) Elektrode5) Electrode
6) Keramikchip6) Ceramic chip
7) Temperatursensor7) Temperature sensor
8) Elektrode8) Electrode
9) Silikonmembran9) Silicone membrane
10) Hohlraum10) Cavity
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE9208591U DE9208591U1 (en) | 1992-07-01 | 1992-07-01 | Device for measuring or collecting the amount of a gas or solid contained in a liquid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE9208591U DE9208591U1 (en) | 1992-07-01 | 1992-07-01 | Device for measuring or collecting the amount of a gas or solid contained in a liquid |
Publications (1)
Publication Number | Publication Date |
---|---|
DE9208591U1 true DE9208591U1 (en) | 1992-08-27 |
Family
ID=6880979
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE9208591U Expired - Lifetime DE9208591U1 (en) | 1992-07-01 | 1992-07-01 | Device for measuring or collecting the amount of a gas or solid contained in a liquid |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE9208591U1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4224616A1 (en) * | 1992-07-25 | 1994-01-27 | Spuehl Ag St Gallen | Measuring device for detecting the gas load or the vapor pressure of a liquid, in particular a flowable plastic component |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU525861A1 (en) * | 1971-12-06 | 1976-08-25 | Всесоюзный Дважды Ордена Трудового Красного Знамени Теплотехнический Научно-Исследовательский Институт Им. Ф.Э.Дзержинского | Method for determining heat of combustion of gaseous fuel |
DE2708610A1 (en) * | 1976-03-01 | 1977-10-06 | Nat Res Dev | METHOD AND DEVICE FOR DETERMINING THE CONCENTRATION OF A COMPONENT OF A GAS MIXTURE |
DE2646927A1 (en) * | 1976-10-18 | 1978-04-20 | Bieler & Lang Ohg | Compensation of gas measurement circuit - has temp. sensitive oscillating circuit whose frequency is converted into DC voltage to control balance of bridge |
DD234186A3 (en) * | 1984-09-06 | 1986-03-26 | Junkalor Dessau | ARRANGEMENT FOR HIGH-SENSITIVENESS THERMOSTATIZATION OF THE MEASURING VALUE OF A GAS ANALYZER |
GB2242141A (en) * | 1990-03-24 | 1991-09-25 | Ion Track Instr | Method and apparatus for detecting low volatility atmospheric vapors |
-
1992
- 1992-07-01 DE DE9208591U patent/DE9208591U1/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU525861A1 (en) * | 1971-12-06 | 1976-08-25 | Всесоюзный Дважды Ордена Трудового Красного Знамени Теплотехнический Научно-Исследовательский Институт Им. Ф.Э.Дзержинского | Method for determining heat of combustion of gaseous fuel |
DE2708610A1 (en) * | 1976-03-01 | 1977-10-06 | Nat Res Dev | METHOD AND DEVICE FOR DETERMINING THE CONCENTRATION OF A COMPONENT OF A GAS MIXTURE |
DE2646927A1 (en) * | 1976-10-18 | 1978-04-20 | Bieler & Lang Ohg | Compensation of gas measurement circuit - has temp. sensitive oscillating circuit whose frequency is converted into DC voltage to control balance of bridge |
DD234186A3 (en) * | 1984-09-06 | 1986-03-26 | Junkalor Dessau | ARRANGEMENT FOR HIGH-SENSITIVENESS THERMOSTATIZATION OF THE MEASURING VALUE OF A GAS ANALYZER |
GB2242141A (en) * | 1990-03-24 | 1991-09-25 | Ion Track Instr | Method and apparatus for detecting low volatility atmospheric vapors |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4224616A1 (en) * | 1992-07-25 | 1994-01-27 | Spuehl Ag St Gallen | Measuring device for detecting the gas load or the vapor pressure of a liquid, in particular a flowable plastic component |
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