Abstract: A sensor unit for measuring a measurement variable in a medium, in particular in an aggressive liquid or gaseous medium, comprises a sensor that is arranged in a sensor capsule and has a sensor region that is arranged on a base body. In order to detect the measurement variable in the sensor region, a measurement opening is provided in the sensor capsule. On a side facing the measurement opening, the sensor region has a measurement surface that is provided with measurement electronics. An electrical supply line is provided on the sensor for the purpose of transmitting a sensor signal that is generated by the measurement electronics. A plated-through hole is provided in the base body. The plated-through hole is used to connect the measurement electronics to the electrical supply line via signals through the base body, on a base side of the sensor that faces away from the measurement opening.

Abstract: A sensor unit for measuring a measurement variable in a medium, in particular in an aggressive liquid or gaseous medium, comprises a sensor that is arranged in a sensor capsule and has a sensor region that is arranged on a base body. In order to detect the measurement variable in the sensor region, a measurement opening is provided in the sensor capsule. On a side facing the measurement opening, the sensor region has a measurement surface that is provided with measurement electronics. An electrical supply line is provided on the sensor for the purpose of transmitting a sensor signal that is generated by the measurement electronics. A plated-through hole is provided in the base body. The plated-through hole is used to connect the measurement electronics to the electrical supply line via signals through the base body, on a base side of the sensor that faces away from the measurement opening.

Abstract: A pressure sensor, particularly for use in extruders of plastic materials, having an outer enclosure containing a supporting element for a semiconductor chip which is provided with a strain-gauge on one of opposite faces of the chip, a covering element in order to close the enclosure, a mechanical transmission element accommodated in the covering element, directed toward the semiconductor chip and in contact with the chip, the semiconductor chip being accommodated so as to float in the supporting element.

Abstract: An electrothermal ink jet print head is constructed in layer structure, wherein the expansion direction of the ink vapor bubble is directed opposite to the ink-ejection direction. Each ink channel (16) of the ink jet print head is supplied with ink by flow throttles for a highest degree of effectiveness. For this purpose, a cover plate (1) is furnished with openings (2). The openings (2) join into an ink storage container. The openings (2) are connected with recess openings (25) to the ink channel (16) in the chip (11). Selectively, the recess openings (25) can be furnished in the chip (11) or in the cover plate (1). A method is provided for producing the recess openings (25).

Abstract: A description is given of sensors in in the form of field effect transistors and capacitors which are suitable for qualitatively and quantitatively determining species to be analyzed, for example molecules or ions, in liquid or gaseous media. A special field of application is the selective determination of the presence and concentration of gases. The sensors are defined in that they have a sensitive layer consisting of a heteropolysiloxane.