Abstract: A system for analysis of a fluid sample has a carrier with a channel. A plug with a sensor can be inserted into a socket arranged on the carrier in such a way that the sensor is in contact with an interior volume of the channel. The sensor can be an optical sensor, in particular based on fluorescence. Optical fibres may be connected to the plug. A camera (8) may be provided to record an image of the plug. The carrier may in particular be a microfluidic chip and the channel a microfluidic channel.

Abstract: In a sensor device, a plurality of light guides having a respective first end and a respective second end are arranged on a common carrier, with the first end of each light guide of the plurality of light guides at a respective defined position on the carrier. At each of the second ends of the light guides there is provided at least one sensor element which exhibits an optical behavior dependent on an analyte. The second ends are at defined perpendicular distances to the carrier. At least two of the second ends differ with respect to the defined perpendicular distances.

Abstract: A method and measurement system for calibrated measurement of at least one variable of a sample are based on an optical behaviour of at least one sensor substance which depends on the at least one variable. The at least one sensor substance is brought into contact with the sample. At least one calibration area, associated with the at least one sensor substance, is defined. At least one image is recorded which captures at least one of the at least one sensor substance and at least one of the at least one calibration area. The value of the at least one variable of the sample is derived from the at least one image, based on image data associated with the at least one of the at least one sensor substance and on image data associated with the at least one of the at least one calibration area.

Abstract: An apparatus, a method and a system for the parallelized recording of at least one variable during a biological/chemical process are disclosed. A matrix, which has at least one container and which can be positioned on a measurement carrier, is provided to accommodate the liquid samples. A measuring unit, which comprises a controllable radiation source for electromagnetic radiation and at least one sensor for detecting electromagnetic radiation, is fixedly disposed in or on the measurement carrier. When at least one matrix with the containers is placed onto the measurement carrier, the respective measuring unit is assigned to the base of each container from the outside. During the measurement by the measuring unit, a movement device is used to move the measurement carrier with a defined radial movement about a fixed axis orthogonal to the gravitational force.

Abstract: In the case of a method for automatically controlling an electrohydraulic pressing tool, in particular for producing pipe connections, to actuate the pressing tool a hydraulic piston is moved, in that fluid is pumped into a hydraulic cylinder by a hydraulic pump driven by an electric motor. When a limiting pressure in the hydraulic cylinder is reached, a pressure relief valve opens, and so the hydraulic fluid can flow into a reservoir. With the aid of a control device, a current drop at the motor is detected when the valve opens. The electric motor is switched off when the current falls by a predetermined value (?I) and/or decreases over a predetermined time period (?t) after reaching a limiting current.

Abstract: A retrievable pressure sensor for the in situ measurement of pressure of a process fluid in a pipe/chamber, and an associated method. The sensor includes a pressure-transferring arrangement which includes a device for sealing attachment in an opening in a wall of the pipe/chamber, a cavity containing a pressure-transferring fluid, a first separation diaphragm for separating between the process fluid and the pressure-transferring fluid, and a second separation diaphragm defining an outer boundary of the cavity containing the pressure-transferring fluid.

Abstract: A method for determining at least one parameter related to a system is disclosed, wherein the at least one parameter depends on at least one relaxation time of the system. The system is excited by a first series of electromagnetic excitation pulses, exhibiting a first defined time gap between consecutive excitation pulses. The response of the system to the first series of excitation pulses is integrated uninterruptedly over time, thus generating a first response signal. Likewise, by uninterrupted integration over time of at least one second response of the system, a second response-signal is generated. The at least one parameter is determined taking into account the first response-signal and the at least one second response-signal.

Abstract: A sensor unit is disclosed which includes a sensor and an information module. The sensor exhibits an optical behavior dependent on at least one variable of a sample. Sensor related information can be emitted by the information module as optical radiation. In embodiments the sensor related information includes calibration data for the sensor. The sensor related information may additionally include identification data for the sensor. In embodiments the information module measures at least one ambient parameter, and emits the measurement value in an optical signal. The measurement value is taken into account when determining at least one variable of a sample by means of the sensor unit. In embodiments the information module may also transmit status information of the sensor unit. Furthermore a method for determining a variable of a sample with a sensor unit and a measurement system is disclosed.

Abstract: A separating membrane for use particularly in pressure sensors, for separating between a process fluid and a pressure-transferring hydraulic oil, is described. The separating membrane is in the form of a thin foil covering an opening into a volume containing the oil, with the foil being fastened to the edges of the opening, and is characterized in that the separating membrane is fastened at the edges of the opening in such a manner that it, in at least one region of its area, exhibits a transition from a concave to convex bulging, whereby the membrane is able to accommodate a volume change of the oil through a non-energy requiring translation of the transition(s). Also described are a method of manufacturing the separating membrane as well as a pressure sensor comprising the separating membrane.

Abstract: A differential pressure sensor for measuring a pressure difference between two high-pressure environments is comprised of a sensor block including internal, oil-filled channels leading to an internally positioned differential pressure sensor element. Two process diaphragms are provided for transferring pressure from the high-pressure environments for isolating two distinct internal oil channels from the high-pressure environments. In order to achieve small internal oil volumes in the sensor block, additionally two separating discs, which initially separate between the two internal oil channels, are positioned in fluid communication with the high-pressure environments in order to block for the pressure from the high-pressure environments against the oil channels “from behind.” The separating discs bear against abutment faces having small openings into the internal oil channels.

Abstract: A sensor assembly, a method, and a measuring system for capturing the distribution of at least one variable of an object are disclosed. The sensor assembly has at least one sensor element comprising at least one first sensor sub-element and at least one second sensor sub-element. The at least one first sensor sub-element is transparent for at least one wavelength region of light, the at least one second sensor sub-element is sensitive to at least one variable. Furthermore a method and measuring system and an illumination system for illuminating the sensor assembly and the object is provided.

Abstract: A pressure sensor unit consists of a shaft part adapted to be introduced in an opening through a pipe wall or chamber wall, and a flange part fastened on the outer end of the shaft part for providing sealing around the outer end of the opening. The shaft part inner end reaches in to engagement with a process fluid which pressure is to be measured. The inner end is provided with perforations for admitting process fluid into the inner room of the shaft part. In the inner room and straight behind the inner end it is arranged a block which constitute a base for a separating membrane for transferal of the process fluid pressure via a hydraulic pipe to a pressure sensor element in the flange part. The flange part is constructed as a thin walled pipe, which is enabled because of internal pressure equalization. Thus great savings is achieved by production of the pressure sensor unit.

Abstract: A differential pressure sensor for measuring a pressure difference between two high-pressure environments is comprised of a sensor block including internal, oil-filled channels leading to an internally positioned differential pressure sensor element. Two process diaphragms are provided for transferring pressure from the high-pressure environments for isolating two distinct internal oil channels from the high-pressure environments. In order to achieve small internal oil volumes in the sensor block, additionally two separating discs, which initially separate between the two internal oil channels, are positioned in fluid communication with the high-pressure environments in order to block for the pressure from the high-pressure environments against the oil channels “from behind.” The separating discs bear against abutment faces having small openings into the internal oil channels.

Abstract: A pressure sensor unit consists of a shaft part adapted to be introduced in an opening through a pipe wall or chamber wall, and a flange part fastened on the outer end of the shaft part for providing sealing around the outer end of the opening. The shaft part inner end reaches in to engagement with a process fluid which pressure is to be measured. The inner end is provided with perforations for admitting process fluid into the inner room of the shaft part. In the inner room and straight behind the inner end it is arranged a block which constitute a base for a separating membrane for transferral of the process fluid pressure via a hydraulic pipe to a pressure sensor element in the flange part. The flange part is constructed as a thin walled pipe, which is enabled because of internal pressure equalisation. Thus great savings is achieved by production of the pressure sensor unit.

Abstract: A pressure gauge is arranged to function on the outside of a measuring element. The measuring element has a central cavity and is constituted by at least to parts, which are tightly joined for creation of the cavity. The measuring element has sensor organs for determining the mechanical state of stress of the measuring element during pressure influence. The two parts of the measuring element are manufactured with planar techniques, preferably by silicon or quarts with the cavity running in the longitudinal direction. The central cavity has a considerably greater height than width. The sensor organs have form of piezo-resistive elements arranged near an outer surface of the measuring element.

Abstract: Luminescent microparticles and nanoparticles are provided for use either as internal standards for referencing fluorescent signals, or as markers for detecting biomolecules. Luminescence dyes are incorporated in inert form into solid materials such that they are protected from the influence of chemical and biological compounds in aqueous sample constituents. The photophysical characteristics of the dyes (spectral characteristics, luminescence quantum efficiency, luminescence fading time and polarization) remain unaffected. The surface of the nanoparticles and microparticles can be provided with reactive surfaces in order to enable covalent coupling of biochemicals or to eliminate aggregation.

Abstract: A method and device for fluorimetric determination of a biological, chemical or physical parameter of a sample utilize at least two different luminescent materials, the first of which is sensitive to the parameter, at least with respect to luminescence intensity, and the second of which is insensitive to the parameter, at least with respect to luminescence intensity and decay time. The luminescent materials have different decay times. The time- or phase behaviour of the resulting luminescence response is used to form a reference value for determination of a parameter.

Abstract: The present invention pertains to a pressure sensor for measuring absolute dynamic pressure. The sensor comprises a frame surrounding a diaphragm, wherein the diaphragm is spaced from the frame by at least two slits which define a restriction that places a reference chamber in fluid communication with a surrounding environment. The diaphragm is connected to the frame at two transition areas, which transition areas are separated from one another by the slits.