DE10355342A1 - Capacitive filling level measurement sensor, especially for motor vehicle use, has a capacitive sensor element that generates a level-dependent frequency signal and signal processing and control elements contained in a housing - Google Patents
Capacitive filling level measurement sensor, especially for motor vehicle use, has a capacitive sensor element that generates a level-dependent frequency signal and signal processing and control elements contained in a housing Download PDFInfo
- Publication number
- DE10355342A1 DE10355342A1 DE2003155342 DE10355342A DE10355342A1 DE 10355342 A1 DE10355342 A1 DE 10355342A1 DE 2003155342 DE2003155342 DE 2003155342 DE 10355342 A DE10355342 A DE 10355342A DE 10355342 A1 DE10355342 A1 DE 10355342A1
- Authority
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- Germany
- Prior art keywords
- capacitive
- magnetic field
- level sensor
- parameterization
- sensor
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
- G01F23/268—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors mounting arrangements of probes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
- G01F23/265—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors for discrete levels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
- G01F23/266—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors measuring circuits therefor
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
Description
Die Erfindung betrifft einen kapazitiven Füllstandssensor, insbesondere zur Füllstandsmessung und/oder -überwachung bei flüssigen Medien bei Nutzfahrzeugen und Verbrennungsmotoren. Des Weiteren betrifft die Erfindung ein Verfahren zur Parametrierung eines kapazitiven Füllstandssensors.The The invention relates to a capacitive level sensor, in particular for level measurement and / or -monitoring at liquid Media for commercial vehicles and internal combustion engines. Furthermore The invention relates to a method for parameterizing a capacitive Level sensor.
Die
Verwendung eines kapazitiven Sensors zur Messung des Füllstands
des Tanks eines Kraftfahrzeugs ist beispielsweise aus der
Der Erfindung liegt die Aufgabe zugrunde, einen kapazitiven Füllstandssensor, welcher bei zuverlässiger Funktion besonders einfach unterschiedlichen Anwendungsfällen anpassbar ist, sowie ein Verfahren zur Parametrierung eines kapazitiven Füllstandssensors anzugeben.Of the The invention is based on the object of providing a capacitive fill level sensor, which at more reliable Function especially easy to adapt to different applications is, as well as a method for the parameterization of a capacitive level sensor specify.
Diese Aufgabe wird durch einen Füllstandssensor mit den Merkmalen des Anspruchs 1 sowie durch ein Verfahren mit den Merkmalen des Anspruchs 6 gelöst. Die im Folgenden im Zusammenhang mit der Vorrichtung genannten Vorteile und Weiterbildungen gelten sinngemäß auch für das Verfahren und umgekehrt. Der Füllstandssensor umfasst ein eine zylindrische Grundform aufweisendes kapazitives Messelement, welches durch das zu messende Medium direkt oder indirekt, insbesondere in einer Leitung, welche nicht Teil des Füllstandssensors ist, beaufschlag- bzw. beeinflussbar ist. An das kapazitive Messelement schließt ein gegenüber diesem vorzugsweise abgedichtetes Gehäuse an, in welchem eine Spannungsversorgungseinrichtung, ein Sensor-Anschlusselement, eine Steuereinheit, eine Parametriervorrichtung sowie ein Signalausgangsbauteil zusammengefasst sind. Das an das Messelement angeschlossene Sensor-Anschlusselement liefert ein füllstands- und damit kapazitätsabhängiges Frequenzsignal an die Steuereinheit. Die mit der Steuereinheit verbundene oder in diese integrierte Parametriervorrichtung weist ein magnetfeldabhängiges Bauteil auf, welches eine drahtlose Parametrierung des Füllstandssensors von außen ermöglicht. Die Parametrierung erfolgt dabei vorzugsweise bei komplett zusammengebautem Füllstandssensor. Durch den Verzicht auf eine drahtgebundene Zuleitung von Parametrierungsdaten sind entsprechende Kontaktierungs- und Abdichtungsprobleme prinzipiell ausgeschlossen. Zugleich ist eine sehr hohe Variabilität des Füllstandssensors, insbesondere eine Eignung für verschiedene zu messende flüssige Medien gegeben. Als besonders rationell zu fertigendes magnetfeldabhängiges Bauteil wird vorzugsweise ein Reed-Kontakt verwendet. Alternativ ist beispielsweise auch die Verwendung eines Hall-Sensors möglich, welcher im Vergleich zum Reed-Kontakt bei geringeren Magnetfeldstärken anspricht, jedoch aufwändiger zu fertigen ist.These Task is by a level sensor with the features of claim 1 and by a method with the features of claim 6 solved. The following related with the device mentioned advantages and developments apply accordingly also for the procedure and vice versa. The level sensor comprises a capacitive having a cylindrical basic shape Measuring element, which by the medium to be measured directly or indirectly, especially in a line which is not part of the level sensor is, acted upon or influenced. To the capacitive measuring element includes one opposite this preferably sealed housing, in which a voltage supply device, a sensor connection element, a control unit, a parameterization device and a signal output component are combined. That at the Measuring element connected sensor connection element supplies a fill level and thus capacity-dependent frequency signal to the control unit. The connected to the control unit or in this integrated parameterization has a magnetic field-dependent component on, which allows a wireless parameterization of the level sensor from the outside. The parameterization is preferably carried out when fully assembled Level sensor. By dispensing with a wired supply of parameterization data are corresponding contacting and sealing problems in principle locked out. At the same time, a very high level of variability of the level sensor, especially a suitability for different liquid to be measured Given media. As a particularly rational to produce magnetic field dependent component it is preferable to use a reed contact. Alternatively, for example also the use of a Hall sensor possible, which in comparison responds to reed contact at lower magnetic field strengths, but consuming too finished is.
Nach einer ersten bevorzugten Ausgestaltung ist das kapazitive Messelement als Zylinderkondensator ausgebildet, welcher einen zentralen Stift sowie ein diesen konzentrisch umgebendes, im Allgemeinen geerdetes Rohr umfasst. Der Zylinderkondensator ist direkt mit dem zu messenden Medium beaufschlagbar, wobei der zentrale Stift mit einem Isolierstoff, vorzugsweise Kunststoff, ummantelt ist. Der Zylinderkondensator eignet sich zur Messung des Füllstands von Öl, beispielsweise Motoröl oder Hydrauliköl, ebenso wie für Bremsflüssigkeit, Kraftstoff oder wässrige Flüssigkeiten.To A first preferred embodiment is the capacitive measuring element designed as a cylindrical capacitor, which has a central pin as well a concentrically surrounding, generally grounded tube includes. The cylinder capacitor is directly to be measured Medium acted upon, the central pin with an insulating material, preferably plastic, is sheathed. The cylinder capacitor is suitable for measuring the level of oil, for example engine oil or hydraulic oil, as well as for Brake fluid, Fuel or watery Liquids.
In einer zweiten bevorzugten Ausgestaltung ist das kapazitive Messelement zur Detektion der Füllung einer Leitung oder eines Schlauches mit einem Medium vorgesehen. Dabei wird der Schlauch bzw. die Leitung von zwei jeweils ein Teil des kapazitiven Messelementes bildenden Schellen gehalten, die nebeneinander längs einer gemeinsamen Achse angeordnet sind. Die beiden Schellen übernehmen prinzipiell die Funktion des Rohres und des Stiftes des Zylinderkondensators und weisen insgesamt ebenfalls eine zylindrische Grundform auf, welche jedoch seitlich, d.h. an der Zylinderwandung, offen ist, um das Einlegen des Schlauches oder der Leitung zu ermöglichen. Die im Gehäuse des so genannten Schlauchsensors angeordnete Messvorrichtung entspricht der Messvorrichtung des den Zylinderkondensator aufweisenden Füllstandssensors.In A second preferred embodiment is the capacitive measuring element for the detection of the filling a conduit or a hose provided with a medium. In this case, the hose or the line of two in each case a part held the capacitive measuring element forming clamps, the side by side along one common axis are arranged. The two clamps take over in principle, the function of the tube and the pin of the cylinder capacitor and overall also have a cylindrical basic shape, which, however, are laterally, i. on the cylinder wall, is open, to allow the insertion of the hose or pipe. The in the case the so-called hose sensor arranged measuring device corresponds the measuring device of the cylinder capacitor having level sensor.
Das mit dem kapazitiven Messelement verbundene Sensor-Anschlusselement liefert in bevorzugter Ausgestaltung ein Frequenzsignal von mindestens 150 kHz und maximal 800 kHz, insbesondere ein Signal zwischen 300 kHz und 450 kHz. Das Nutzsignal-Intervall, d.h. die Differenz zwischen der höchsten Frequenz des Messbereichs, welche auftritt, wenn kein zu messendes Medium am kapazitiven Messelement anliegt, und der niedrigsten Frequenz des Messbereichs, welche auftritt, wenn das zu messende Medium das kapazitive Element vollständig beaufschlagt, beträgt vorzugsweise mindestens 20 kHz und maximal 200 kHz, insbesondere 50 kHz bis 100 kHz. Damit ist eine sehr hohe Detektionssicherheit des Füllstandssensors gegeben.In a preferred embodiment, the sensor connection element connected to the capacitive measuring element supplies a frequency signal of at least 150 kHz and at most 800 kHz, in particular a signal between 300 kHz and 450 kHz. The useful signal interval, ie the difference between the highest frequency of the measuring range, which occurs when no medium to be measured is applied to the capacitive measuring element, and the lowest frequency of the measuring range, which occurs when the medium to be measured completely applied to the capacitive element is preferably at least 20 kHz and a maximum of 200 kHz, in particular 50 kHz to 100 kHz. This gives a very high detection reliability of the level sensor.
Die per moduliertem Magnetfeld übermittelten Parametrierungsdaten werden an den Füllstandssensor vorzugsweise als vier Byte aufweisende Parametrierungsdatensätze übertragen, welche jeweils ein Kennungs-Byte, zwei Parameter-Bytes und ein Checksummen-Byte umfassen. Die Empfangsimpulsbreite der mittels des magnetfeldabhängigen Bauteils empfangenen Impulse beträgt bevorzugt mindestens zwei Millisekunden und höchsten 200 Millisekunden. Dies stellt auch bei einem einfach, kostengünstigen magnetfeldabhängigen Bauteil, insbesondere einem Reed-Kontakt, eine ausreichende Übertragungsrate bei zugleich zuverlässiger Übertragung sicher.The transmitted by modulated magnetic field Parameterization data is preferably sent to the level sensor transmit as four-byte parameterization records, each one Include identifier byte, two parameter bytes and a checksum byte. The received pulse width of the means of the magnetic field dependent component received pulses preferably at least two milliseconds and a maximum of 200 milliseconds. This also provides a simple, inexpensive magnetic field dependent device, especially a reed contact, a sufficient transmission rate at the same time reliable transmission for sure.
Die durch das modulierte Magnetfeld übertragenen Parametrierungsdaten können prinzipiell sämtliche Betriebsparameter des Füllstandssensors betreffen. Dies sind insbesondere ein Schaltpunkt des Sensors, eine einstellbare Fehlermeldeverzögerung sowie eine einstellbare Kontrollzeit, während der nach Anlegen der Spannungsversorgung das Ausgangssignal erscheint und damit die Funktionsbereitschaft des Füllstandssensors signalisiert.The transmitted through the modulated magnetic field Parameterization data can in principle all Affect operating parameters of the level sensor. These are in particular a switching point of the sensor, an adjustable Error message delay and an adjustable control time, during which after the application of Power supply the output signal appears and thus the operational readiness of the level sensor signaled.
Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand einer Zeichnung näher erläutert. Hierin zeigen:following is an embodiment of Invention explained in more detail with reference to a drawing. Herein show:
Einander entsprechende oder gleich wirkende Teile sind in allen Figuren mit den gleichen Bezugszeichen versehen.each other corresponding or equivalent parts are in all figures with provide the same reference numerals.
Ein
kapazitiver Füllstandssensor
Die
Messvorrichtung
Weiter
sind an die Steuereinheit
Eine
erste Ausführungsform
eines kapazitiven Füllstandssensors
nach
Zur
Parametrierung des Füllstandssensors
Die
per moduliertem Magnetfeld übermittelten
Parametrierungsdaten betreffen neben dem zu detektierenden Medium,
charakterisiert durch dessen Dielektrizitätskonstante, insbesondere die
Betriebsart des Füllstandssensors
Der
Füllstandssensor
Um
ein unbeabsichtigtes Ansprechen des Füllstandssensors
Im
Ausführungsbeispiel
nach den
- 11
- Füllstandssensorlevel sensor
- 22
- Messelementmeasuring element
- 33
- Messvorrichtungmeasuring device
- 44
- Steuereinheitcontrol unit
- 55
- Sensor-AnschlusselementSensor connection element
- 66
- ParametriervorrichtungParametriervorrichtung
- 77
- SignalausgangsbauteilSignal output device
- 88th
- Programmiermodulprogramming module
- 99
- Parametriermodulparameter module
- 1010
- Bauteilcomponent
- 1111
- SpannungsversorgungseinrichtungPower supply means
- 1212
- Schutzeinrichtungguard
- 1313
- VerpolschutzReverse polarity protection
- 1414
- EMV-GehäusemassungEMC Gehäusemassung
- 1515
- Spannungsanschlussvoltage connection
- 1616
- Spannungsanschlussvoltage connection
- 1717
- Signalanschlusssignal connection
- 1818
- Zylinderkondensatorcylindrical capacitor
- 1919
- zentraler Stiftcentrally pen
- 2020
- Rohrpipe
- 2121
- Gehäusecasing
- 2222
- Magnetspulesolenoid
- 2323
- Schlauchsensortube sensor
- 2424
- Schlauchtube
- 2525
- Schelleclamp
- 2626
- Platinecircuit board
- 2727
- Anschlussstückconnector
- 2828
- Kragencollar
- 2929
- Dichtungpoetry
- 3030
- Scheibedisc
- 3131
- Bördelungflanging
- 3232
- Befestigungsbuchsemounting bushing
- 3333
- Anschlusskabelconnection cable
- 3434
- Anzeigevorrichtungdisplay device
- 3535
- Potentiometerpotentiometer
- AA
- Achseaxis
Claims (16)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003155342 DE10355342A1 (en) | 2003-11-25 | 2003-11-25 | Capacitive filling level measurement sensor, especially for motor vehicle use, has a capacitive sensor element that generates a level-dependent frequency signal and signal processing and control elements contained in a housing |
DE202004016673U DE202004016673U1 (en) | 2003-11-25 | 2004-10-28 | Capacitive level sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003155342 DE10355342A1 (en) | 2003-11-25 | 2003-11-25 | Capacitive filling level measurement sensor, especially for motor vehicle use, has a capacitive sensor element that generates a level-dependent frequency signal and signal processing and control elements contained in a housing |
Publications (1)
Publication Number | Publication Date |
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DE10355342A1 true DE10355342A1 (en) | 2005-06-30 |
Family
ID=34202453
Family Applications (2)
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DE2003155342 Ceased DE10355342A1 (en) | 2003-11-25 | 2003-11-25 | Capacitive filling level measurement sensor, especially for motor vehicle use, has a capacitive sensor element that generates a level-dependent frequency signal and signal processing and control elements contained in a housing |
DE202004016673U Expired - Lifetime DE202004016673U1 (en) | 2003-11-25 | 2004-10-28 | Capacitive level sensor |
Family Applications After (1)
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DE202004016673U Expired - Lifetime DE202004016673U1 (en) | 2003-11-25 | 2004-10-28 | Capacitive level sensor |
Country Status (1)
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DE (2) | DE10355342A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2461137A1 (en) * | 2010-12-03 | 2012-06-06 | Baumer Innotec AG | Sensor with a teach-in switch and method for initiating a teach-in process |
KR102342565B1 (en) * | 2014-12-30 | 2021-12-23 | 삼성전자주식회사 | Oil level detecting apparatus and control method thereof, oil flow detecting apparatus and control method thereof, method for control oil return using oil level and oil flow |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9218364U1 (en) * | 1992-09-02 | 1994-01-27 | Doduco GmbH + Co Dr. Eugen Dürrwächter, 75181 Pforzheim | Device for measuring the oil level |
DE19537223C1 (en) * | 1995-10-06 | 1997-02-13 | Grieshaber Vega Kg | Potential-free measuring arrangement |
WO1998025109A2 (en) * | 1996-11-22 | 1998-06-11 | Berwind Corporation | Material level sensing |
EP0718607B1 (en) * | 1994-12-23 | 2001-09-19 | Nerina Lorenzetti | An automatic system for the detection and remote transmission of data in particular of typical data relative to tanks for liquid fuels |
DE10046863C1 (en) * | 2000-09-20 | 2002-01-10 | Leuze Lumiflex Gmbh & Co | Interface for light barrier device has communication device for optoelectronic data transfer activated by magnetically-operated switch |
DE10206463A1 (en) * | 2002-02-16 | 2003-09-11 | Grieshaber Vega Kg | Method for operating a level measuring device and level measuring device |
-
2003
- 2003-11-25 DE DE2003155342 patent/DE10355342A1/en not_active Ceased
-
2004
- 2004-10-28 DE DE202004016673U patent/DE202004016673U1/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9218364U1 (en) * | 1992-09-02 | 1994-01-27 | Doduco GmbH + Co Dr. Eugen Dürrwächter, 75181 Pforzheim | Device for measuring the oil level |
EP0718607B1 (en) * | 1994-12-23 | 2001-09-19 | Nerina Lorenzetti | An automatic system for the detection and remote transmission of data in particular of typical data relative to tanks for liquid fuels |
DE19537223C1 (en) * | 1995-10-06 | 1997-02-13 | Grieshaber Vega Kg | Potential-free measuring arrangement |
WO1998025109A2 (en) * | 1996-11-22 | 1998-06-11 | Berwind Corporation | Material level sensing |
DE10046863C1 (en) * | 2000-09-20 | 2002-01-10 | Leuze Lumiflex Gmbh & Co | Interface for light barrier device has communication device for optoelectronic data transfer activated by magnetically-operated switch |
DE10206463A1 (en) * | 2002-02-16 | 2003-09-11 | Grieshaber Vega Kg | Method for operating a level measuring device and level measuring device |
Non-Patent Citations (2)
Title |
---|
Prospekt der E-T-A Elektrotechnische Apparate GmbH, D-90518 Altdorf, "E-T-A Automation Sicher- heit für Ihre Maschine", Druckvermerk "SGF-Automa- tion d (11/03)A", S. 1-16 |
Prospekt der E-T-A Elektrotechnische Apparate GmbH, D-90518 Altdorf, "E-T-A Automation Sicher- heit für Ihre Maschine", Druckvermerk "SGF-Automa-tion d (11/03)A", S. 1-16 * |
Also Published As
Publication number | Publication date |
---|---|
DE202004016673U1 (en) | 2005-02-10 |
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