Abstract: The invention involves a marked plate for a rotational angle sensor element for rotating structural parts, with many angle marks provided preferably oriented radially to the rotational axis and preferably arranged in the form of a collar arranged concentrically to the rotational axis and with at least one reference mark, which is formed by an angle mark that deviates in its modulating properties and thus is integrated in the collar of the angle marks. An angle sensor element system for rotating structural parts includes a marked plate that can be coupled to the rotating structural part and that merely has a collar of angle marks with integrated reference marks and a fixed scanning unit for it, including at least one transmitter of electromagnetic radiation and at least one receiver for the radiation modulated by the marked plate, as well as mechanisms for connection to an evaluation unit.

Abstract: A sensor (1) is provided in the region of the connecting socket (3) for the connecting cable (5) with an integrated identification unit (6) which can be electrically queried and contacted through a separate pole of the connecting cable (5), on the one hand, and through the cable shield of the connecting cable (5), on the other hand, whereby the sensitivity of the sensor (1) can be coded and queried from the outside via the connecting cable (5) by means of the identification unit (6).

Abstract: The invention involves a marked plate for a rotational angle sensor element for rotating structural parts, with many angle marks provided preferably oriented radially to the rotational axis and preferably arranged in the form of a collar arranged concentrically to the rotational axis and with at least one reference mark, which is formed by an angle mark that deviates in its modulating properties and thus is integrated in the collar of the angle marks. An angle sensor element system for rotating structural parts includes a marked plate that can be coupled to the rotating structural part and that merely has a collar of angle marks with integrated reference marks and a fixed scanning unit for it, including at least one transmitter of electromagnetic radiation and at least one receiver for the radiation modulated by the marked plate, as well as mechanisms for connection to an evaluation unit.

Abstract: A sensor used especially for the measurement of the internal pressure of injection lines of diesel engines comprises two housing parts which are connected via an articulation and can be clamped to the line with a tension device. For simple and in particular one-handed attachment of the sensor in every state of opening or closing, the tension device is located in the same sector, facing the articulation, on one side of the external region of the tube. The connecting plug for the discharging of the measuring signals is preferably insertible in the correspondingly fashioned articulation and can be locked there.

Abstract: A sensor is provided that can be used for measuring the internal pressure of injection lines of diesel engines includes two housing parts that are connected via a joint and can be clamped to the injection line using a clamping device. At least one electrical measuring element is pressed, in essentially uniform elastic fashion, onto the surface of the hollow body to be measured. The sensor also includes a support element that operates essentially in radial fashion. A protective film is arranged between the surface and the measuring element. The protective film has a thickness greater than or equal to the radial dimension of foreign bodies or the like that are to be expected on the surface of the hollow body to be measured. The protective film consists of plastic with a low modulus of elasticity.