Heraeus Electro-nite International N.v.

Heraeus Holding Gmbh

Roth-technik Gmbh & Co.

Kernforschungszentrum Karlsruhe Gmbh

Forschung Fur Automobil- Und Umelttechnik

Roth-tecknik Gmbh & Co. Forschung Fur Automobil Und Umwelttechnik

Roth-technik Gmbh & Co. Forschung Fur

Edelbert Hafele

Walter Seeger

Ulrich Schonauer

Karl-Heinz Hardtl

Karlheinz Wienand

Ulrich Guth

Steffen Jakobs

A measuring sensor for measuring a fluid includes a longitudinally extending housing having first and second ends and having an inlet opening at the first end for the fluid to be measured, and a sensor chip provided in the housing. The sensor chip has a sensor element provided towards the inlet opening and at least one electrically conducting contact provided towards the second end of the housing. The electrically conducting contact is connected to the exterior by a metal jacket lead having an outer metal tube, at least one internal conductor, and a mineral material for electrically insulating the at least one conductor, the outer metal tubing connected in a fluid-tight manner to the second end of the housing. In order to secure the sensor to an installation opening, a collar is welded to an outside of the housing at a selected position corresponding to a selected installation depth of the opening of the housing into the measuring opening, A threaded connector is provided over the collar such that the thread connector mates with a correspondingly threaded element of the measuring opening and secures the sensor in the measuring opening with the selected installation depth by bearing against the collar.

Measuring sensor

According to the state of the art, either two separate sensor elements are generally used to determine the exhaust gas temperature and the air/fuel ratio, lambda, or the temperature and lambda readings are not taken simultaneously, at least at temperatures of less than 250.degree. C. In addition, sufficiently precise simultaneous measurement is only possible during stationary operation. The process according to the invention and the corresponding sensor arrangement now make it possible to obtain a precise temperature and lambda reading at a minimal degree of metrological complexity, especially under non-stationary conditions, in that a heated sensor, which exhibits a temperature-sensitive and oxygen-sensitive element on a carrier element, is used to measure the exhaust gas temperature, even at low temperatures with the heating system switched off, while a lambda reading is obtained simultaneously, with the latter being possible only at higher temperature ranges.

Process for the determination of the exhaust gas temperature and of the

Measuring sensor to measure a gas, comprising: a housing having an inlet opening for the gas to be measured, a sensor chip located within said housing and having a sensor element at one end area of the sensor chip facing the inlet opening and an electrical connection connected electrically with the sensor element provided at another and, and with at least one contact trace which is electrically conducting, wherein the electrical connection is joined to the contact trace by laser welding.

A measuring sensor for measuring a fluid includes a longitudinally extending housing having first and second ends and having an inlet opening at the first end for the fluid to be measured, and a sensor chip provided in the housing. The sensor chip has a sensor element provided towards the inlet opening and at least one electrically conducting contact provided towards the second end of the housing. The electrically conducting contact is connected to the exterior by a metal jacket lead having an outer metal tube, at least one internal conductor, and a mineral material for electrically insulating the at least one conductor, the outer metal tubing connected in a fluid-tight manner to the second end of the housing. In order to secure the sensor to an installation opening, a collar is welded to an outside of the housing at a selected position corresponding to a selected installation depth of the opening of the housing into the measuring opening. A threaded connector is provided over the collar such that the thread connector mates with a correspondingly threaded element of the measuring opening and secures the sensor in the measuring opening with the selected installation depth by bearing against the collar.

Measuring sensor having metal jacket lead and externally mounted

System for monitoring the functioning ability of catalytic converters

An electrode material is provided for electrochemical sensors, particularly for sensors detecting combustible gases. For these types of applications, perovskite electrode materials are known which, however, by modification of their oxygen stoichiometry, have a considerable charge carrier mobility. These defects are the causes for an additional, catalytic activity with oxidation processes at electrodes. The measurement of hydrocarbons from combustible gases is thus distorted with electrode materials of this type. These disadvantages are overcome by making such electrode materials from mixed oxides with non-perovskite crystalline structures, which have chemical compositions of one or more of the following general formulas: (A/D).sub.3-y B.sub.x C.sub.5-x O.sub.12.+-..delta., D.sub.1-y B.sub.1-x C.sub.x O.sub.4.+-..delta., D.sub.2-y B.sub.8-x C.sub.x O.sub.16.+-..delta., D.sub.2-y B.sub.1+x C.sub.1-x O.sub.5.+-..delta., or D.sub.2-y B.sub.x C.sub.2-x O.sub.7.+-..delta., wherein A and D are respectively sub-stoichiometrically used cations of the lanthanide series and the alkaline earth metal group, A/D means a cation selected from A, D and mixture thereof, B is a multivalent ion, and C is a redox-stable ion.

Electrode material

Catalytic converter as well as a manufacturing method therefor

Catalytic converter

Gas sensor

Housing for gas sensors

There is provided a start-up catalyzer for catalyzing exhaust gas from an internal combustion engine in which flat and corrugated sheets are disposed in alternating relation. Some of the flat sheets have an electrically conductive resistance-heating layer which may be catalytically active and in form of a plurality of rosette-shaped conductive loops connected in series.

The invention concerns a device for continuously monitoring the level of at least one gaseous constituent in a mixture of gases. The drawbacks of the known devices are complexity, high power consumption, large size, and, due to their high mass, non-uniform distribution of temperature, entailing imprecise measurement, and inertia, especially at the commencement of operation. These drawbacks are eliminated with a base in the form of a water with at least two electrodes in the form of separated thin coatings and with a temperature sensor separated from the electrodes on one side and with a heater in the form of an electric-resistance heating coating on the other side.

Growing community of inventors

Karlsruhe, Germany

Edelbert Hafele