Abstract: A gas sensor includes a sensor element for determining at least one physical quantity of a gas, e.g., for determining the concentration of a gas component in an exhaust gas of an internal combustion engine or the temperature of the exhaust gas. The sensor element is fixed in position by the sealing system in a housing of the gas sensor. The sealing system includes at least one sealing element, which includes a mixture of a ceramic material and a glass. The hemisphere temperature of the glass is above 750° Celsius.

Abstract: measuring sensor, in particular for determining the oxygen content in the exhaust gases of internal combustion engines, includes a sensor element which is axially arranged in a metallic housing and which is contacted by at least one connecting cable, which is brought axially out of the housing, through a support sleeve member, and which has a cable insulation, a reference atmosphere for the sensor element being introducible into the housing, and the cable insulation, at the surface area, having, at least in certain regions, at least one gas-permeable section, such that the reference atmosphere arrives inside the cable insulation and, from there, in the housing. The gas-permeable region of the cable insulation is directly contiguous to the cable-output end of the support-sleeve member and sheathed there by a porous tube of gas-permeable PTFE material, while allowing for a radial clearance between the porous PTFE tube and the gas-permeable section of the cable insulation.

Abstract: A seal is proposed for a sensor element of a gas sensor, in particular for determining the oxygen content in exhaust gases of combustion engines. The seal has a sealing element, which is fixed in position in a longitudinal bore of a metallic housing. The sealing element contains a mixture of steatite and at least one low-melting-point glass. To manufacture the seal, a prefabricated sealing ring made of a mixture of steatite powder and powdered glass is used, which is pressed in the longitudinal bore, the sealing ring being subjected to a thermal treatment, in which the glass is melted.

Abstract: The invention relates to a gas probe (10) for installation in a measurement gas chamber, having a metal housing (30) in which a planar sensor element (21) is disposed, electrically insulated, with at least one contact face (22) that is conductively connected to a metal conductor element (23). For the conductor element (23), an electrically insulating contact holder (24) is provided, which presses the conductor element (23) onto the contact face (22) by means of a spring element (25) that engages the contact holder (24). The conductor element (23) is disposed in an indentation (26) of the contact holder (24), which indentation is oriented toward the contact face (22) of the sensor element (21), and by way of a region protruding out of the indentation (26) of the contact holder (24), the conductor element is in contact with the contact face (22).

Abstract: The present invention relates to a gas sensor (10) having a metallic housing (12) and being secured via a hollow screw (50) in a measuring opening (56) having a measuring gas, the housing (12) including a collar (51) as the support for the hollow screw (50). A conically shaped surface (54a), with which the gas sensor (10) rests on a conically shaped opposite surface (54b) of measuring opening (56), is provided on the side of housing (12) facing the measuring opening (56). The conically shaped surface (54a) of the housing (12) has an angle a with respect to a longitudinal axis of housing (12) that is less than 60°.

Abstract: The measuring sensor, particularly a lambda probe, has a ceramic sensor member retained at a high temperature during measuring operation. It is shielded from water droplets, carried along in the gas to be analyzed, by a heated protective housing, permeable for the gas to be analyzed, by which water droplets carried along in the direction of the sensor member are evaporated before reaching the sensor member. In this way, the water droplets are unable to cause any shock-like temperature drops at spots on the surface of the sensor member or material flaking.

Abstract: A sensor for determining an oxygen content in an exhaust gas of an internal combustion engine includes a receptacle, arranged in a longitudinal bore of a metal housing, for a sensing element. The sensing element is received in the receptacle in a gas-tight fashion via a sensing element seal, which includes a glass seal. The receptacle has a measured-gas-side ceramic shaped element and a connector-side ceramic shaped element, which are arranged axially one behind the other. A cavity into which the glass seal is pressed while hot is configured between the two ceramic shaped elements.

Abstract: An absolutely secure joining of the protective pipes to the housing is to be achieved during operation, in the case of a metal housing of an internal-combustion-engine exhaust gas sensor having two protective pipes attached thereto, the pipes being disposed coaxially one inside of the other and projecting outwardly from the housing; each of the pipes being made of the same kind of metal; at least the outer protective pipe being welded to the housing; and the pipes being radially set apart at least in their respective regions projecting from the housing. For this purpose, at least the inner pipe and the metal housing are joined to one another in a force-locked and form-locked manner in the axial direction of this protective pipe, via radially intermeshed projections, at least when the metal housing is in a closed state.

Abstract: A measuring sensor, in particular, for determining the oxygen content in exhaust gases of internal combustion engines, includes a ceramic molding arranged in a metal housing for the accommodation of a sensor element, in particular, planar, the sensor element being sealed by a seal element made of warm-deformable temperature-resistant material. The molded housing is designed in one piece and has a cylindrically shaped longitudinal hole on the connector side, around the sensor element, and the seal element is compressed between a first compressing element on the measuring-gas side and a second compressing element on the connector side, such that it tightly encloses the sensor element and hermetically seals the sensor element with respect to the molded housing.

Abstract: A measuring device (e.g., an electrochemical sensor) has a sensor element arranged at a measuring point, the sensor element being arranged in a housing, which is linked via electrical connecting lines to an evaluation circuit away from the measuring point, and the electrical connecting lines being routed, at least in the vicinity of the measuring point, in a protective device. Provision is made that the protective device is joined, with a force-locking and form-locking fit, to the housing via an attachment device, which embraces (surrounds) the housing and the protective device, to form a sealing seat.

Abstract: A sensor, in particular for determining the oxygen content in exhaust gases of internal combustion engines, is proposed, as well as a method for its manufacture. The sensor includes a receptacle, arranged in a longitudinal bore (16) of a metal housing (10), for a sensing element (12), in which receptacle the sensing element (12) is received in gas-tight fashion via a sensing element seal, the sensing element seal being a glass seal (57). The receptacle has a measured-gas-side ceramic shaped element (20) and a connector-side ceramic shaped element (27), which are arranged axially one behind the other. A cavity (55) into which the glass seal (57) is pressed while hot is configured between the two ceramic shaped element (20, 27).

Abstract: A gas sensor, in particular for determining the content of gases in the exhaust of an internal combustion engine, has a contact part carrier composed of two opposing, externally symmetrical half-shells, engaging in and contacting the terminal end of a sensor which runs axially and is installed in a tubular protective sleeve, with the half-shells of the contact part carrier being held together by a spring element. The spring element is designed to exert only a low clamping force on the half-shells of the contact part carrier in a first bracing step when the contact part carrier is pre-mounted on the terminal end of the sensor, so that the sensor can still be inserted easily between the two half-shells. In a second bracing step it presses from all sides against the two half-shells due to the inside wall of the protective sleeve and pushes them against the supporting contact points with a greater force than in the first bracing step.

Abstract: A sealing member is produced from form-pressed boron nitride powder, while adding an inorganic or organic binding agent. Such boron nitride powder is obtained during the machining of boron nitride blocks composed of hexagonal boron nitride. This powder can be fractionated according to particle size and the particle size desired for manufacturing the sealing member can be separated out.

Abstract: A seal for a sensor element of a gas sensor for determining the oxygen content in exhaust gases of internal combustion engines. The seal includes at least one sealing element that is inserted into a longitudinal bore of a housing and that includes a mixture of at least one ceramic compound and at least one fluoride compound.

Abstract: A sensor for determining an oxygen content of an exhaust gas of an internal combustion engine includes a flat-plate sensing element that is inserted in a gas-tight fashion via a hybrid seal in a ceramic shaped element that is arranged in a metal housing. The seal includes a powdered sealing packing, both placed around the sensing element in a recess at one end of the ceramic shaped element and a fusible glass seal located above the powdered sealing packing. The seal achieves gas-tight and gasoline-resistant isolation or immobilization of the sensing element in the ceramic shaped element.

Abstract: A seal arrangement for a sensing element of a gas sensor, in particular for determining the oxygen content in exhaust gases of internal combustion engines, includes a packet made up of several seal elements, packed one on top of another, which immobilize the sensing element in a longitudinal bore of a metallic probe housing. A funnel-shaped diversion element lying in the axial direction of the sensor is integrated into the seal elements packed one above another in such a way that gas permeability between the diversion element and the inner wall of the probe housing is ensured. Toward the measured-gas end of the sensor, a small gap remains open between the sensing element and the diversion element.

Abstract: A sensor for determining an oxygen level in an exhaust gas of an internal combustion engine includes a receptacle arranged in a longitudinal bore of a metallic enclosure for a sensor element. The sensor element is accommodated in a gas-tight manner using a sensor element seal. The receptacle has a measured gas-side ceramic molded component and a connection-side ceramic molded component, which are arranged one behind the other axially. A hollow space is formed between the measured gas-side ceramic molded component and the connection-side ceramic molded component, in which a metallic sealing element is hot-pressed.

Abstract: A heating element, preferably for oblong plate-shaped sensors for measuring oxygen concentration in internal combustion engine exhaust gas, has a conductive heating strip at one end of the heating element and electrical conductors which are connected electrically to the conductive heating strip and which supply the heating current and provide connection to the other end of the heating element. The positive temperature coefficient of the resistor material of the conductive heating strip is lower than the positive temperature coefficient of the material of at least one section of the conductors.

Abstract: An arrangement for sealing a cable bushing for at least one connecting cable, and in particular for a connecting cable of a sensor element of a gas sensor. On the terminal side, the sensor element is arranged in a metallic housing which has a tubular opening, in which a sealing arrangement is disposed, through which the connecting cable is conducted. The sealing arrangement is fixedly surrounded by the housing and has an elastically deformable sealing element and a spring element acting in the direction of the leading-through of the connecting cable, the sealing element being elastically deformed by the spring energy of the spring element.

Abstract: An electrochemical sensor for determining the oxygen content of gases of internal combustion engines includes a ceramic element that is inserted with a sealing ring into a housing. The sealing ring is built up from different metal layers. The arrangement of the metal layers proceeds from a metal support which is composed of a steel alloy. The sealing ring is covered on both sides with a roll-clad copper layer. A nickel layer can additionally be arranged beneath the copper layer.