Abstract: A gas sensor for determining a physical property of a measuring gas, in particular for determining the temperature of the measuring gas or the concentration of a gas component of the measuring gas. The gas sensor has a sensor element, at least one contact surface situated on the sensor element, and a contact piece electrically connected to the contact surface. The contact piece is clamped in a friction-type manner between the contact surface and at least one press-on body which is clamped against the sensor element by a spring element. The spring element at least partially grips around the press-on body and has a groove.

Abstract: A sensor for measuring a physical property of a measuring gas, in particular the oxygen concentration or the temperature in the exhaust gas of an internal combustion engine in a motor vehicle, has a housing, a measuring element whose end section protrudes from the housing, a connector plug mounted on the end section, and a housing shell covering the end section and connector plug with a radial clearance, one shell end of the housing shell being attached to the housing and the other shell end being sealed. To prevent electromechanical breakage in the sensor in the event of extreme vibration stresses or accelerations of the vehicle, the free space within the housing shell is completely filled with a non-conductive granulate.

Abstract: An unheated planar sensor element for determining the concentration of a gas component in a gas mixture, in particular the oxygen concentration in the exhaust gas of an internal combustion engine, has a sensor foil made of a solid electrolyte with an outer electrode exposed to the measuring gas, and an inner electrode exposed to a reference gas, as well as a reference-gas channel, which is covered by the sensor foil on one side and accommodates the inner electrode. To produce a small-volume, cost-effective unheated sensor element for use in small combustion engines having low power output yet sufficiently satisfactory measuring accuracy, the reference-gas channel is sealed on the underside by an additional sensor foil made of a solid electrolyte, and covered by an inner electrode lying inside the reference-gas channel and an outer electrode exposed to the measuring gas.

Abstract: A sensor system having a sensor for measuring a gas parameter of a test gas via a measuring element which is accommodated in a housing and projects therefrom at least on the test gas side at a protruding section, and a test-gas line, through which the test gas flows, having a sensor insertion opening and a receiving element for the housing surrounding the insertion opening and attached to the test-gas line. For the purpose of assembly-independent, reproducible alignment of the measuring element with respect to the test-gas flow during assembly of the sensor system, the receiving element bears an internal thread, the piercing point of which is oriented with respect to the test-gas flow, and the housing bears an external thread, which is able to be screwed into the internal thread and the piercing point of which is oriented with respect to the measuring element. The housing is fixed via a predefined tightening torque in the receiving element.

Abstract: A sensing element for determining a physical property of a gas mixture, in particular the exhaust gas of internal combustion engines, includes a sensor element, arranged in a housing and connected to at least one electrical cable, as well as a molded piece, which seals the housing and is made of an elastically deformable material, which encloses the at least one cable in a gas-tight manner by radial compression. To ensure the gas-tightness of the cable feed-through also under a higher temperature load, which results in decreased elasticity of the molded piece, a spring element is arranged inside the molded piece, which is able to be tensioned by the radial compression and in the tensioned state generates a force component that acts on the cables in a radial direction.

Abstract: An unheated planar sensor element for determining the concentration of a gas component in a gas mixture, in particular the oxygen concentration in the exhaust gas of an internal combustion engine, has a sensor foil made of a solid electrolyte with an outer electrode exposed to the measuring gas, and an inner electrode exposed to a reference gas, as well as a reference-gas channel, which is covered by the sensor foil on one side and accommodates the inner electrode. To produce a small-volume, cost-effective unheated sensor element for use in small combustion engines having low power output yet sufficiently satisfactory measuring accuracy, the reference-gas channel is sealed on the underside by an additional sensor foil made of a solid electrolyte, and covered by an inner electrode lying inside the reference-gas channel and an outer electrode exposed to the measuring gas.

Abstract: The ceramic sensor body, held inside a housing by a sealing packing, is provided with a circumferential coating of an electrically insulating material in the region of the sealing packing, so that the sensor body remains potential-free with respect to the housing, even when a sealing packing is used that is made of a material having poor electrical insulating qualities. In this manner, a glass putty is used for the sealing packing, which, while having comparatively poor insulating characteristics, provides a good sealing effect at high loading capacity.

Abstract: A gas sensor is provided, for example, a sensor for determining the concentration or the temperature of a gas component. The gas sensor has a housing, in which a sensor element having at least one contact surface is arranged. The contact surface is conductively connected to a conductor element. The sensor element having the contact surface and the conductor element is arranged between two contact supports situated opposite one another. A spring element contacting the contact supports presses the conductor element onto the contact surface. Each of the contact supports, on sides facing one another, has at least one recess and at least one protuberance, the protuberance of one contact support engaging in the recess of the other contact support, and vice versa.

Abstract: A detecting element is described, in particular a gas sensor for detecting the concentration of a gas component in a measuring gas, including a sensor element which is exposable to the measuring gas and has a connecting end section which is contacted by connecting cables and is exposed to a reference gas atmosphere. The end section is accommodated in a protective sleeve having a radial opening over which a gas-permeable diaphragm covering the at least one radial opening is provided, the diaphragm, in turn, being engaged by a clamping sleeve having at least one radial opening. To avoid the axial penetration of liquids between the clamping sleeve and the diaphragm, which would cause the detecting element to malfunction, the clamping sleeve is caulked axially above and below the radial openings. Both caulking zones are designed in such a way that the diaphragm is compressed with increasing force from the inner caulking edges facing each other to the outer caulking edges facing away from each other.

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

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: An exhaust gas sensor includes a sensor element configured to communicate with an exhaust gas of an internal combustion engine, a contact pin having a first end electrically connected to the sensor element and a second end extending away from the sensor element, and a spark plug-type post terminal connected to the second end of the contact pin. The spark plug-type post terminal preferably conforms with SAE J548-1 standards and can be threaded onto the second end of the contact pin. Also provided is an exhaust gas sensor designed to be shorter and better suited for use in non-automotive applications.

Abstract: A gas sensor is for determining at least one physical quantity of a gas, e.g., an exhaust gas of an internal combustion engine, the gas sensor having a sensor element that is fixed in a housing of the gas sensor by a seal assembly. The seal assembly includes a sealing element, which has a ceramic and/or a metallic material. After the heat treatment, the sealing element has a maximum decrease in volume of 5 percent, or an increase in volume, based on the volume of the sealing element prior to the heat treatment.

Abstract: Electrical connecting lines of a sensor element are anchored by friction locking, specifically using an annularly closed spring element which clamps the connecting lines against contact surfaces on the sensor element using pressure bodies.

Abstract: The ceramic sensor body, held inside a housing by a sealing packing, is provided with a circumferential coating of electrically insulating material in the region of the sealing packing, so that the sensor body remains potential-free with respect to the housing, even when a sealing packing is used that is made of a material having poor electrical insulating qualities. In this manner, it is also possible to use a glass putty for the sealing packing, which, while having comparatively poor insulating characteristics, provides a good sealing effect at high loading capacity.

Abstract: A sensor, in particular for determining the oxygen content in exhaust gases of internal combustion engines, is provided. The sensor includes a sensing element arranged in a housing having a reference gas space-side housing part, and a sensing element seal which hermetically separates a reference gas space from a measured gas space. Provided inside the reference gas space-side housing part is a sleeve, enclosing the sensor element on a longitudinal segment, which forms a receptacle for the sensing element seal.

Abstract: A gas sensor, in particular a lambda probe, for ascertaining the pollutant and/or oxygen content in emission gases of internal combustion engines, having a housing accommodating at least one sensor element, the sensor element having a section on the terminal side and a section on the measuring-gas side, and having a connecting element that connects the sensor element, which has a plurality of electrically conductive contact areas, at its terminal-side section to a plurality of electrically conductive supply leads. The gas sensor has the feature of a connecting element which is formed from a spring element produced in one piece from ceramic material.

Abstract: A gas sensor, for example, a gas sensor for detecting at least one gas component in an exhaust gas is provided, in which a sensor element is situated in a metal housing. At a connection-side end of the housing, in a contact area, the sensor element has a support element, in which at least one partial area of at least one contact is situated. A porous material is situated between the support element and the housing. In the contact area, the housing includes at least one aperture. A flow path is situated along an outer surface of the support element, so that the exhaust gas, which may be located outside the gas sensor, may reach a connection-side end of the sensor element through the aperture in the housing, through the porous material and via the flow path along the outer surface of the support element.

Abstract: A gas sensor is provided, for example, a sensor for determining the concentration or the temperature of a gas component. The gas sensor has a housing, in which a sensor element having at least one contact surface is arranged. The contact surface is conductively connected to a conductor element. The sensor element having the contact surface and the conductor element is arranged between two contact supports situated opposite one another. A spring element contacting the contact supports presses the conductor element onto the contact surface. Each of the contact supports, on sides facing one another, has at least one recess and at least one protuberance, the protuberance of one contact support engaging in the recess of the other contact support, and vice versa.