Abstract: A method for determining the degree of soiling of an air filter, in particular of an air filter in the interior space of motor vehicle, in which air to be purified is directed across at least one filter body in a predetermined direction of flow. An indirect pressure measurement takes place before and after the at least one filter body in the predefined direction of flow. An apparatus for determining the degree of soiling of an air filter is also provided, having at least one filter body as well as an airflow chamber connected upstream of the filter body and an airflow chamber connected downstream of the filter body. An indirect pressure measurement device is allocated to the airflow chamber connected upstream of the filter body and to the airflow chamber connected downstream of the filter body.

Abstract: In a sensor module for measuring a pressure of a fluid, having at least one supporting element, at least one electronic circuit, particularly an integrated circuit, arranged on at least one circuit carrier, and with at least one pressure measuring chip that has at least one pressure measuring membrane, wherein at least sections of the circuit carrier are surrounded by a protective material to protect it from surrounding fluids, it is provided as essential to the invention that the pressure measuring chip and the circuit carrier are arranged vertically one underneath the other, and that the pressure measuring chip is at least partially mechanically decoupled from the supporting element.

Abstract: In a sensor device for detecting moisture on a pane comprising at least one transmitter which emits light which is reflected at the pane and received by at least one receiver, an optical system is provided between the transmitter and the receiver, which brings about a multiple reflection between the pane and the optical system. A particularly good measurement is thereby made possible.

Abstract: In a sensor device for determining the evaporation pressure of a fluid, in particular of a fluidic fuel, in a vehicle with at least one heating element, the invention provides that the sensor device has a filling level sensor with a circuit carrier and that the heating element is arranged on the circuit carrier of the filling level sensor.

Abstract: The invention relates to a high-temperature sensor comprising contact wires in a metal tube, preferably a bent metal tube for arrangement especially inside the exhaust gas system of an internal combustion engine, and spacer bodies distributed in rows along the contact wires so as to maintain the contact wires at a predetermined distance to the inner wall of the metal tube. According to the invention, every spacer body is approximately ovoid, the diameter of the center portion of the egg being not wider than the inside width of the as yet unbent metal tube. The spacer bodies are injection-molded polymer ceramic parts molded onto the contact wires.

Abstract: In a sensor module for measuring a pressure of a fluid, having at least one supporting element, at least one electronic circuit, particularly an integrated circuit, arranged on at least one circuit carrier, and with at least one pressure measuring chip that has at least one pressure measuring membrane, wherein at least sections of the circuit carrier are surrounded by a protective material to protect it from surrounding fluids, it is provided as essential to the invention that the pressure measuring chip and the circuit carrier are arranged vertically one underneath the other, and that the pressure measuring chip is at least partially mechanically decoupled from the supporting element.

Abstract: For a gas sensor, in particular for automobile applications, comprising a housing, which has a measurement chamber, wherein at least one sensor element having connecting wires is associated with the measurement chamber, the housing has a bottom part and a top part that covers the bottom part and each sensor element is arranged in the bottom part while suspended by the connecting wires thereof. At least one side wall of the bottom part favorably has an assembly opening, which is designed in such a way that a tool arm that retains the sensor element can be inserted into the bottom part from the outside through the assembly opening and can be brought into an assembly position in the area of the opening edge of the bottom part so that the connecting wires of the sensor element are in bondable contact with the associated connection surfaces. Thus especially easy assembly is possible.

Abstract: In a sensor device for detecting moisture on a pane comprising at least one transmitter which emits light which is reflected at the pane and received by at least one receiver, an optical system is provided between the transmitter and the receiver, which brings about a multiple reflection between the pane and the optical system. A particularly good measurement is thereby made possible.

Abstract: In the case of a device for detecting physical state variables of a medium, such as pressure or temperature, for example, of a liquid, comprising at least one measuring sensor, which is connected to at least one electrical conductor so as to transmit signals, wherein at least one section of the conductor, which encompasses the sensor, is embedded in a casting compound, the casting compound is embodied, according to the invention, from at least one casting core and a casting jacket, which encloses the casting core, and provision is made in the casting compound for at least one recess for a media-conducting access to a contact surface of the sensor.

Abstract: The invention relates to a high-temperature sensor comprising contact wires in a metal tube, preferably a bent metal tube for arrangement especially inside the exhaust gas system of an internal combustion engine, and spacer bodies distributed in rows along the contact wires so as to maintain the contact wires at a predetermined distance to the inner wall of the metal tube. According to the invention, every spacer body is approximately ovoid, the diameter of the center portion of the egg being not wider than the inside width of the as yet unbent metal tube. The spacer bodies are injection-molded polymer ceramic parts molded onto the contact wires.

Abstract: For a gas sensor, in particular for automobile applications, comprising a housing, which has a measurement chamber, wherein at least one sensor element having connecting wires is associated with the measurement chamber, the housing has a bottom part and a top part that covers the bottom part and each sensor element is arranged in the bottom part while suspended by the connecting wires thereof. At least one side wall of the bottom part favorably has an assembly opening, which is designed in such a way that a tool arm that retains the sensor element can be inserted into the bottom part from the outside through the assembly opening and can be brought into an assembly position in the area of the opening edge of the bottom part so that the connecting wires of the sensor element are in bondable contact with the associated connection surfaces. Thus especially easy assembly is possible.

Abstract: In the case of a device for detecting physical state variables of a medium, such as pressure or temperature, for example, of a liquid, comprising at least one measuring sensor, which is connected to at least one electrical conductor so as to transmit signals, wherein at least one section of the conductor, which encompasses the sensor, is embedded in a casting compound, the casting compound is embodied, according to the invention, from at least one casting core and a casting jacket, which encloses the casting core, and provision is made in the casting compound for at least one recess for a media-conducting access to a contact surface of the sensor.