Abstract: A non-return device, for example, for a crude gas line, comprises a housing, a seat, arranged in the housing, and a flap that is pivotably attached in the housing and rests on the seat in a closed state of the non-return device and is lifted off of the seat in an open state of the non-return device. The flap comprises at least one flexible connecting element on the housing, with a first end region of the connecting element being attached to the housing and with a second end region of the connecting element being attached to the flap.

Abstract: Device for spatially resolved measurement of temperature and/or strain by Brillouin scattering, with a laser light source (1) for generating a laser radiation, an optical fiber (5) used for the measurement, into which the laser radiation can be coupled in and from which Brillouin signals generated by Brillouin scattering can be coupled out, sensors for detecting the coupled-out Brillouin signals, evaluators for determining spatially resolved from the detected Brillouin signals the temperature and/or strain of sections of the optical fiber (5), a polarization beam splitter (10, 11) capable of splitting the coupled-out Brillouin—signals into two components (12, 13) having mutually different polarizations, and an optical coupler (16, 17) for admixing a laser radiation to the Brillouin signal.

Abstract: The invention relates to a burst disk assembly with a single-part or multi-part body (1), which has an opening that forms an outlet for a conduit or a container, with a burst disk (2) that closes the opening and ruptures when subjected to burst pressure in order to unblock the opening, wherein the burst disk assembly has an actuator (3) with which the burst pressure can be reduced.