The device for detecting and/or determining the concentration of an analyte present in a tissue includes a sensor which is an optical fibre interferometer, and one interferometer arm being coated with an immobilised binding agent enabling selective binding of the analyte. The interferometer arm is mounted inside a guide enabling puncturing the tissue and performing an in situ measurement without the necessity to collect or prepare a sample. The guide is provided with a closed guide face, longitudinal perforations on sidewalls enabling the analyte to reach the binding agent, and an opening in the input end of the guide for introducing the interferometer with the arm into the guide. At the input end, the opening is sealed, enabling the isolation of the interior of the guide from the surroundings. The interferometer is mounted in a position in which the interferometer does not touch the inside walls of the guide.

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.

A cost-effective and limited interaction explosive detector for dangerous, illegal, and/or illicit substances such as explosives, flammable or volatile fluids, and/or other appropriate substances is described. The explosive detector may be integrated into various containers or packages, such as cardboard boxes, paper envelopes, metal shipping containers, and/or other containers or packaging. The integrated explosive detector may provide a visual indication when a subject substance is encountered. The integrated explosive detector may include a port or vent that allows for ambient flow of fluids, such as air, between an interior of the container and the outside environment.

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.

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.

A measuring method for measuring dissolved oxygen includes performing a first measurement sequence, including: emitting a first stimulation signal onto a sensor for a first period; detecting a first detection signal; determining a phase shift between the first stimulation signal and the first detection signal; and calculating a first measured value based on the determined phase shift. Performing a second measurement sequence, including a second stimulation signal onto the sensor for a second period, wherein the second stimulation signal is different than the first stimulation signal; detecting a second detection signal; determining a decay time of the second detection signal; calculating a second measured value based on the decay time. The method further includes comparing the first measured value to the second measured value and correcting the first measured value when a difference between the first measured value and the second measured value is greater than a first limit value.

Systems, methods, and apparatus are disclosed for determining quantitative hormone and chemical analyte results from qualitative test results. An image is taken of an ovulation test device. The image is analyzed to identify a color intensity ratio (T/C ratio) between a color density of a test-line to a color density of a control-line. Additionally, a quantitative substance level may be determined using the T/C ratio, by identifying the type of test device and referencing a data structure that relates quantitative substance levels to T/C ratios for the identified type of test device.

Systems, devices, and methods for detecting agrochemicals in environments associated with agricultural equipment are described. Certain agrochemicals that are formulated for being detected using the systems, devices, and methods disclosed herein are also described. The devices, systems, and methods disclosed herein are generally configured to use spectral characteristics to detect agrochemicals in an environment associated with agricultural equipment. The spectral characteristics can be analyzed in various ways to provide different types of information about the agrochemicals and/or the environment.

A light transmission structure is provided for use, in conjunction with a light source and detector, for selective detection of biomolecule interactions and/or absorption of infrared light. The light transmission structure includes a substrate having a bottom surface adapted to couple the light source and detector to the light transmission structure, a coupling and enhancing layer disposed on at least a portion of an upper surface of the substrate, a first near-critical angle anti-reflective coating (NCA-ARC) layer disposed on at least a portion of an upper surface of the coupling and enhancing layer, and a second NCA-ARC layer disposed on at least a portion of an upper surface of the first NCA-ARC layer. An upper surface of the second NCA-ARC layer is functionalized and textured so that transmitted incident light is scattered out of the light transmission structure. A difference in refractive index between adjacent NCA-ARC layers is less than about 0.01.

Methods for making nanocomposites are provided. In an embodiment, such a method comprises combining a first type of nanostructure with a bulk material in water or an aqueous solution, the first type of nanostructure functionalized with a functional group capable of undergoing van der Waals interactions with the bulk material, whereby the first type of nanostructure induces exfoliation of the bulk material to provide a second, different type of nanostructure while inducing association between the first and second types of nanostructures to form the nanocomposite.