A composition sensor for measuring composition of fluid mixtures is presented. The composition sensor includes a plurality of high-brightness emission sources having respective spectrally narrow wavelength emission bands in the infrared region. The wavelength emission bands overlap absorption wavelength bands of the composition. The wavelength emission bands are wavelength multiplexed and time multiplexed prior to emission through a fluid mixture. A single optical detector senses the emitted light. The composition sensor includes arms that can rotate to measure composition at different angular position of a pipe in a lateral section of an oil well. Rotation of the arms is provided by rotation of an element of a mobile vessel to which the arm is rigidly coupled. The rotation of the arms is provided by a rotation of a nose of the mobile vessel that rotates independently from a main body of the mobile vessel.

Provided is a liquid sensor or the like that is relatively easy to manufacture. The liquid sensor includes a light emitting element, an optical waveguide, a light receiving element, and a detection circuit. The optical waveguide includes a first pillar portion, a first metal plate, a second pillar portion, and a second metal plate. The first metal plate is embedded in the first pillar portion. The second pillar portion is provided at a position opposing the first pillar portion. The second metal plate is embedded in the second pillar portion. A space for liquid is formed between the first pillar portion and the second pillar portion. The first pillar portion includes a first end surface that faces the light emitting element. The first metal plate includes a first reflecting portion that is tilted relative to the first end surface and reflects light toward the second pillar portion. The second pillar portion includes a second end surface that faces the light receiving element. The second metal plate includes a second reflecting portion that is tilted relative to the second end surface and reflects the light from the first metal plate toward the light receiving element.

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.

The present disclosure relates to methods and systems for assessing the quality of a meat product. In certain embodiments, the present disclosure provides a method of assessing quality of a meat product, the method comprising receiving data representative of light emitted from the meat product upon application of incident light to the meat product, analysing the data to determine one or more parameters indicative of quality of the meat product, and assessing the quality of the meat product on the basis of the one or more parameters.

Provided is a urea solution sensor that can accurately measure a concentration of urea. The ammonia concentration sensor (1) includes: a light source (10) that emits measurement light toward a measurement subject, the measurement light including near-infrared light; a light reception unit (20) that receives transmitted light or reflected light from the measurement subject; and an analysis unit (30) that analyzes a concentration of urea contained in the measurement subject based on a spectrum of light which has been received by the light reception unit (20).

According to an embodiment of the disclosure, a device for measuring a turbidity of a solution containing fine particles comprises a laser module emitting a laser beam of a predetermined wavelength band, a coupler outputting the laser beam along a first laser path and a second laser path divided from each other, a probe outputting the laser beam output along the first laser path to a container containing the solution, a light receiving element receiving, through the first laser path, the laser beam reflected or scattered by the fine particles in the solution and detecting the received laser beam, and a controller calculating the turbidity based on a strength of the laser beam detected by the light receiving element.

A device for monitoring a bioreactor is configured for in-situ analysis, e.g., by NIR, without the need for withdrawing a sample into a sample cell or into an ex-situ arrangement. The device can be inserted into a port of the bioreactor and provides a sample detection region defined by an optical element such as a lens and a photodetector. The electrical signal obtained from a photodetector that is part of the device can be directed to an analyzer via a detachable electrical connection.

A device for monitoring a bioreactor is configured for in-situ analysis, e.g., by NIR, without the need for withdrawing a sample into a sample cell or into an ex-situ arrangement. The device can be inserted into a port of the bioreactor and provides a sample detection region defined by an optical element such as a lens and a photodetector. The electrical signal obtained from a photodetector that is part of the device can be directed to an analyzer via a detachable electrical connection.

A system for monitoring a composition includes: an electromagnetic source that emits a beam; one or more evanescent field sensing element inside a tubular structure, arranged in series along a flow direction of the composition, and configured to be in direct contact with the composition; a waveguide that directs at least a portion of the beam to the evanescent field sensing element as an incident beam; and a detector configured to obtain a spectral distribution of the fingerprint beam. The evanescent field sensing element provides partial or total internal reflection of the incident beam at an interface between the evanescent field sensing element and the composition, and the incident beam interacts with the composition to form a fingerprint beam.

The invention discloses a biosensor device (100) to detect the presence of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) infection in a biological sample. The device includes an optical fiber probe (104) having a curved portion (104a) with a probe region (105) immobilized with bioreceptor molecules (201) configured to bind to the target molecule V indicative of the presence of the SARS-CoV-2. The probe has a light source (102) and a detector (106) on either end. The device works on the principle of plasmonic fiberoptic absorbance biosensing. Plasmonic gold nanoparticles (120) are used as either sensor substrate over the fiber or labels conjugated with a biorecognition molecule (211). The probe is exposed to a biological sample either directly for label-free detection, or after mixing with labels to realize a sandwich assay. The target biomolecules are detected by a proportional drop in the light intensity passing through the probe.