Abstract: An optochemical sensor for measuring luminescing analytes in a measurement medium includes a sensor housing, a light source, a functional element, a photodetector and a control unit, wherein the sensor housing includes a window suitable for coming into contact with the measurement medium, wherein the light source is configured to emit a stimulation signal in such a way that the stimulation signal is partially emitted onto the functional element and the stimulation signal is partially emitted through the window into the measurement medium as to stimulate a first analyte present in the measurement medium, wherein the functional element includes a reference dye that includes an inorganic material and is suitable for emitting a first luminescence signal upon stimulation with the first stimulation signal.

Abstract: The present disclosure relates to an optochemical sensor element, comprising: a substrate layer having a first substrate side facing toward a measuring medium and a second substrate side opposite the first substrate side; a functional layer arranged on the first substrate side and is subdivided into functional segments separate from one another, wherein a first functional segment has a second reference dye and a second functional segment has an indicator dye, wherein the second reference dye comprises an organic material and is insensitive to oxygen, and is suitable to emit a second luminescence signal upon stimulation with a first stimulation signal, wherein the indicator dye comprises an organic material and is sensitive to oxygen, and is suitable to emit a third luminescence signal upon stimulation with the first stimulation signal, wherein the substrate layer is transparent to the stimulation signal and to the second and third luminescence signals.

Abstract: An optochemical sensor for determining a measurement signal, which correlates with a concentration of an analyte of a measuring fluid, comprises: a sensor cap including a sensor spot, wherein the sensor spot contains at least one analyte-sensitive indicator dye and a state description indicator which reflects the aging state of the sensor spot; a radiation source to radiate excitation radiation onto the sensor spot and to excite a luminescence of the indicator dye; a radiation receiver to receive reception radiation emitted by the sensor spot; and a sensor circuit electrically connected to the radiation source and the radiation receiver and configured to control the radiation source and to generate, based on an intensity of luminescence and/or a phase angle of luminescence, a measurement signal representing the concentration of the analyte in the measuring fluid in contact with the sensor spot.

Abstract: A sensor element for an optochemical sensor includes: a luminescence indicator, whose luminescence can be quenched with oxygen; and scavenger units to deactivate singlet oxygen, forming a chemical reaction product by reacting with singlet oxygen, wherein the scavenger units are selected to be recovered by a decomposition reaction induced thermally, photochemically or by a pressure increase of the chemical reaction product formed by the reaction with singlet oxygen.

Abstract: The present disclosure relates to an electrochemical sensor for determining a measurand correlating with a concentration of an analyte in a measuring fluid, comprising: a sensor membrane designed to be in contact with the measuring fluid for detecting measured values of the measurand; a probe housing which has at least one immersion region designed for immersion into the measuring fluid, wherein the sensor membrane is arranged in the immersion region of the probe housing; and a measurement circuit which is at least partially contained in the probe housing and is designed to generate and output a measurement signal dependent on the measurand, wherein the sensor membrane contains an optically detectable substance for marking the sensor membrane.

Abstract: An optochemical sensor for determining a measurement signal, which correlates with a concentration of an analyte of a measuring fluid, comprises: a sensor cap including a sensor spot, wherein the sensor spot contains at least one analyte-sensitive indicator dye and a state description indicator which reflects the aging state of the sensor spot; a radiation source to radiate excitation radiation onto the sensor spot and to excite a luminescence of the indicator dye; a radiation receiver to receive reception radiation emitted by the sensor spot; and a sensor circuit electrically connected to the radiation source and the radiation receiver and configured to control the radiation source and to generate, based on an intensity of luminescence and/or a phase angle of luminescence, a measurement signal representing the concentration of the analyte in the measuring fluid in contact with the sensor spot.

Abstract: The present disclosure relates to a method for manufacturing a sensor cap with at least one main body and a membrane for an optochemical or electrochemical sensor for determining and/or monitoring the concentration of an analyte in a measuring medium, a corresponding sensor cap, and a corresponding sensor. In one aspect of the present disclosure, a permeable membrane is provided with a surface for contacting the measuring medium, as well as a main body with at least one sector for connecting to the membrane. At least part of the membrane and main body are welded, wherein the membrane is at least partially applied to the at least one sector of the main body and a connection between the main body and membrane is sealed against the measuring medium.

Abstract: The present disclosure relates to an optical measurement probe for the detection of measurement values correlating with a measurand of a measuring medium, including a probe housing having at least one immersion region structured to be immersed in the measuring medium, a radiation source arranged in the probe housing, a radiation receiver arranged in the probe housing, and an indicator chamber formed in the probe housing and sealed via a membrane arranged in the immersion region of the probe housing, wherein an indicator is contained in the indicator chamber, the indicator including an AIE-active substance dissolved in an indicator solution or in an indicator gel, which AIE-active substance is a substance formed from species, molecules, complexes or clusters whose luminescence efficiency is increased via formation of aggregates containing the species.

Abstract: An optochemical sensor unit including: an optical waveguide; a transmitting unit for emitting a first transmission signal for exciting a luminophore; a receiving unit for receiving a received signal comprising a signal component emitted by the excited luminophore; a measuring chamber for receiving a fluid, wherein the fluid includes magnetic microspheres; a membrane arranged between the measuring chamber and a measuring medium for exchanging an analyte between the measuring medium and the fluid in the measuring chamber, wherein the measuring diaphragm is impermeable to the magnetic microspheres; and an electromagnet for attracting magnetic microspheres to a sensor membrane with a fluid-contacting surface and/or to a fluid-contacting surface of the optical waveguide, or to a surface of a transparent substrate layer of the optical sensor unit that is connected to the optical waveguide.

Abstract: A sensor for measuring a pH value of a measuring liquid includes: a sensor element including a surface adapted to the measuring liquid; a radiation source configured to emit electromagnetic transmission radiation to the sensor element, wherein at least a portion of the transmission radiation is converted into measurement radiation by reflection and/or scattering in a region of the surface; a radiation receiver configured to receive the measurement radiation and convert it into electrical signals; and a measuring circuit configured to determine the pH value from signals, wherein a wavelength of at least a portion of the transmission radiation generates charge carriers in at least a surface region or a near-surface region of the surface of the sensor element as to effect a photoelectrochemical reaction with formation of hydrogen at the surface.

Abstract: A sensor for measuring a pH value of a measuring liquid includes: a sensor element comprising a surface adapted to contact the measuring liquid; a radiation source configured to emit electromagnetic transmission radiation reaching the sensor element, wherein at least a portion of the transmission radiation is converted into measuring radiation by reflection and/or scattering in the region of the surface; a radiation receiver configured to receive the measuring radiation and convert it into electrical signals; and a measuring circuit connected to the radiation receiver and configured to determine a measured value representing the pH value of the measuring liquid from signals of the radiation receiver, wherein the surface adapted to contact the measuring liquid includes a pH-sensitive component and a SERS-active component.

Abstract: The present disclosure relates to an electrochemical sensor for determining a measurand correlating with a concentration of an analyte in a measuring fluid, comprising: a sensor membrane designed to be in contact with the measuring fluid for detecting measured values of the measurand; a probe housing which has at least one immersion region designed for immersion into the measuring fluid, wherein the sensor membrane is arranged in the immersion region of the probe housing; and a measurement circuit which is at least partially contained in the probe housing and is designed to generate and output a measurement signal dependent on the measurand, wherein the sensor membrane contains an optically detectable substance for marking the sensor membrane.

Abstract: The present disclosure discloses an optochemical sensor for determining a measurand correlating with a concentration of an analyte in a measuring fluid, comprising: a housing having an immersion region configured for immersing in the measuring fluid; a removable cap having a sensor spot, the removable cap removably arranged at the immersion region of the housing, wherein the sensor spot is disposed on a circumferential face; a radiation source disposed in the housing for radiating excitation radiation into the removable cap, wherein a deflection module is disposed in the removable cap as to deflect excitation radiation radiated into the removable cap; a radiation receiver disposed in the housing for receiving received radiation emitted by the sensor spot; and a sensor circuit disposed in the housing and configured to control the radiation source, receive signals of the radiation receiver, and generate output signals based on the signals of the radiation receiver.

Abstract: The present disclosure relates to a measuring arrangement for measuring an ozone content in a measured medium, including: a first sensor surface and a second sensor surface; a first cover element adjacent the first sensor surface and including an ozone binder that binds ozone without releasing oxygen or any species further reacting to form oxygen; a second cover element adjacent the second sensor surface and including an ozone converter that reacts with ozone to form oxygen; a measuring sensor configured to generate a first measurement signal dependent on the oxygen concentration at the first sensor surface and a second measurement signal dependent on the oxygen concentration at the second sensor surface; and an electronic evaluation unit configured to determine the ozone content in the measured medium based on the first and the second measurement signals.

Abstract: The present disclosure relates to an electrochemical sensor for determining a measurand correlating with a concentration of an analyte in a measuring fluid, comprising: a sensor membrane designed to be in contact with the measuring fluid for detecting measured values of the measurand; a probe housing which has at least one immersion region designed for immersion into the measuring fluid, wherein the sensor membrane is arranged in the immersion region of the probe housing; and a measurement circuit which is at least partially contained in the probe housing and is designed to generate and output a measurement signal dependent on the measurand, wherein the sensor membrane contains an optically detectable substance for marking the sensor membrane.

Abstract: A sensor membrane for an optical sensor, wherein the outer layer in contact with the medium and/or a layer adjacent thereto has a graft copolymer to form an omniphobic surface in contact with the medium, as well as a sensor cap and/or an optical sensor and a method for manufacturing the sensor membrane.

Abstract: The present disclosure relates to an optochemical sensor element comprising: a substrate layer having a first substrate side facing toward a measurement medium and an opposite second substrate side; a functional layer, on the first substrate side and having a first reference dye, an indicator dye, and a second reference dye, wherein the first reference dye comprises an inorganic material, is insensitive to pH, and is suitable to emit a first luminescence signal upon stimulation, wherein the indicator dye comprises an organic material and is sensitive to pH, and is suitable to emit a third luminescence signal upon stimulation, wherein the second reference dye comprises an organic material, is insensitive to pH, and has a passivated functional group, and is suitable to emit a second luminescence signal upon stimulation, wherein the substrate layer is transparent to the stimulation signal and the luminescence signals.

Abstract: The present disclosure relates to an optochemical sensor element, comprising: a substrate layer having a first substrate side facing toward a measuring medium and a second substrate side opposite the first substrate side; a functional layer arranged on the first substrate side and is subdivided into functional segments separate from one another, wherein a first functional segment has a second reference dye and a second functional segment has an indicator dye, wherein the second reference dye comprises an organic material and is insensitive to oxygen, and is suitable to emit a second luminescence signal upon stimulation with a first stimulation signal, wherein the indicator dye comprises an organic material and is sensitive to oxygen, and is suitable to emit a third luminescence signal upon stimulation with the first stimulation signal, wherein the substrate layer is transparent to the stimulation signal and to the second and third luminescence signals.

Abstract: An electrochemical half-cell includes an electrical terminal lead in contact with a solid electrolyte, wherein the solid electrolyte includes a doped high-entropy oxide. The electrochemical half-cell can be used as either a reference half-cell or a measuring half-cell. Methods of manufacturing the solid electrolyte and the electrochemical half-cell are further disclosed.

Abstract: A sensor system comprises a first mobile sensor unit and a stationary sensor unit. The first mobile sensor unit has a first sensor for acquiring a first measured value and a first wireless communication unit for receiving a calibration value and for transmitting the first measured value. The stationary sensor unit has a second sensor for acquiring a second measured value and a second wireless communication unit for transmitting the calibration value and for receiving the first measured value.