Abstract: A pipe adapter for optical flow measurement having a fluid pipe that has a flow-through inner flow space. At least one window element transparent to a measurement optics is introduced in the fluid pipe. The fluid pipe is surrounded, at least in the region of the window element, by a pressure-resistant housing by which the window element is mounted in an inner housing space, and with the inner housing space is at least indirectly fluidically interactive and/or in fluidic communication with the inner flow space.

Abstract: A flow measurement method for optical measurement of a volume flow of a fluid in a closed cross-section, and a flow measurement device for this purpose, has at least one light source and at least one sensor unit. Particles present in the fluid are detected within a measurement plane by the sensor unit. At least one measurement plane and the particles present therein are illuminated with the light source. The sensor unit is provided with at least two or with a plurality of individual detectors with which sensor signals are outputted. A computing unit is connected downstream of the sensor unit, with which the sensor signals are processed in real time by integrating and weighting the individual signals of the individual detectors using a spatial-filtering technique and outputted as an output signal.

Abstract: A flow measurement method for optical measurement of a volume flow of a fluid in a closed cross-section, and a flow measurement device for this purpose, has at least one light source and at least one sensor unit. Particles present in the fluid are detected within a measurement plane by the sensor unit. At least one measurement plane and the particles present therein are illuminated with the light source. The sensor unit is provided with at least two or with a plurality of individual detectors with which sensor signals are outputted. A computing unit is connected downstream of the sensor unit, with which the sensor signals are processed in real time by integrating and weighting the individual signals of the individual detectors using a spatial-filtering technique and outputted as an output signal.

Abstract: A pipe adapter for optical flow measurement having a fluid pipe that has a flow-through inner flow space. At least one window element transparent to a measurement optics is introduced in the fluid pipe. The fluid pipe is surrounded, at least in the region of the window element, by a pressure-resistant housing by which the window element is mounted in an inner housing space, and with the inner housing space is at least indirectly fluidically interactive and/or in fluidic communication with the inner flow space.

Abstract: A method of referencing in optical absorption spectroscopy using broadband light sources for determining the concentration of substances in gaseous or fluid media through and to a device for measuring the concentration of substances in gaseous or fluid media within the measurement path of a measurement cell using absorption spectroscopy of light emitted from broadband light sources via light guiding optics.

Abstract: A method of referencing in optical absorption spectroscopy using broadband light sources for determining the concentration of substances in gaseous or fluid media through and to a device for measuring the concentration of substances in gaseous or fluid media within the measurement path of a measurement cell using absorption spectroscopy of light emitted from broadband light sources via light guiding optics.

Abstract: The present invention relates to a device for determining the concentration of substances in fluid media.

Abstract: The invention relates to a spatial filter measuring arrangement (1) and a spatial filter measuring device (2) comprising at least one sensor (4, 5; 41I-41IV; 51) and a spatial filter, wherein electromagnetic radiation, in particular light, that is emitted or reflected by a measurement object (13), is imaged onto the sensor (4, 5; 41I-41IV; 51, 52) by means of the spatial filter. The invention further relates to a method for spatial filter measurement. The spatial filter measuring arrangement according to the invention is further developed in that the spatial filter is designed as a micro-mirror array which has mirror elements (21-21??) which can be moved about respective angular positions.

Abstract: The invention relates to a spatial filter measuring arrangement (1) and a spatial filter measuring device (2) comprising at least one sensor (4, 5; 41I-41IV; 51) and a spatial filter, wherein electromagnetic radiation, in particular light, that is emitted or reflected by a measurement object (13), is imaged onto the sensor (4, 5; 41I-41IV; 51, 52) by means of the spatial filter. The invention further relates to a method for spatial filter measurement. The spatial filter measuring arrangement according to the invention is further developed in that the spatial filter is designed as a micro-mirror array which has mirror elements (21-21??) which can be moved about respective angular positions.

Abstract: The invention relates to a method and to a device for using partially non-stabilized broadband light sources to accurately measure partially broadband-absorbing substances using referencing measuring cells. In order to create a low-cost, high-resolution, and at the same time fast spectrographic device for measuring concentrations of substances in fluid or gaseous media that is also suitable for harsh environments, the light radiated by the broadband light sources (1) through light guiding optical systems is fed through the measuring section of the self-referencing measuring cell (20, 30, 40) or only partially through a measuring cell (10) to a measurement detector (photoreceptor 11) and partially through a reference path (optical waveguide 8) to a reference detector (photoreceptor 15), and a mode coupler (5, 9, 14) is associated with each optical waveguide (2, 4, 7, 8) in order to homogenize the radiation characteristic of the broadband light sources (1), which varies over time and space.