An arrangement for measuring gas concentrations in a gas absorption method, wherein the arrangement includes a plurality of light sources, a measuring cell, at least one measuring receiver and an evaluation apparatus. The measuring cell has a narrow, longitudinally-extended beam path with an entrance-side opening diameter B and an absorption length L with L>B, wherein the measuring cell has a gas inlet and a gas outlet wherein a plurality of light sources of different wavelength spectra is grouped into a first light source group wherein an optical homogeniser is interposed between the first light source group and the measuring cell, wherein, in particular, the homogeniser is coupled to the light source group directly or via a common optical assembly.

A system and method for mapping metabolic data of a heart. The system has a light source directing light onto the heart, one or more lenses for focusing an image of the heart, and a fluorescent detector receiving the focused image and generating transients and/or waves to map metabolic cardiac data.

Disclosed is apparatus (1) for measuring fluorescence and absorbance of a substance in a sample, said apparatus (1) comprising: a flow cell (2) for containing a sample, a first light source (3), a first conductor (5) for transmitting light from the first light source (3) to the flow cell (2) for irradiating a sample contained therein, a second conductor (7) for transmitting light from the flow cell (2) to a sample detector (9) arranged to detect an electromagnetic radiation that has passed through said cell (2), and a processing unit (16) arranged to receive a first signal (31) from a reference detector (15) and a second signal (32) from the sample detector (9) and to determine an absorbance based on said first and second signals (31,32), said apparatus (1) further comprising a second light source (4), a third conductor (6) for transmitting light from the second light source (4) to the cell (2) and wherein the sample detector (9) is further arranged to also detect fluorescence signals in the light that has passed through the flow cell (2). The invention also relates to a method for measuring the absorbance and the fluorescence of a substance in a sample.

The invention relates to a system for determining a level of nitrate in a water sample, including: (a) an optical flow cell which is at least partially transparent and which is configured to contain a sample of water; (b) a first illuminator for illuminating the sample by light in a first wavelength, and a first photodetector for collecting the first-wavelength illumination, following the light passage through the sample; (c) a second illuminator for illuminating the sample within the cell by light in a second, fluorescence-exciting wavelength, and a second photodetector for collecting illumination in a third, fluorescence-emission wavelength from the sample; and (d) an analysis unit for determining the combined effect of nitrate+DOC within the sample on the absorbance of light, determining a concentration of DOC within the sample based on fluorescence emission from the sample, and subtracting the effect of DOC from the combined effect of nitrate+DOC on the absorbance, thereby to determine a concentration of nitrate within the sample.

The invention relates to a device (1) and a corresponding method for mid-infrared microscopy and/or analysis, the device (1) comprising at least one radiation unit (10) configured to generate radiation (11) of time-varying intensity, the radiation (11) comprising one or more wavelengths in the mid-infrared spectral range, at least one refractive and/or reflective optical unit (12) which is configured to focus and/or direct the radiation (11) to at least one region or point of interest (20) located on and/or with-in an object (2), at least one detection unit (18) configured to detect ultrasound waves (17) emitted by the object (2) at the at least one region or point of interest (20) in response to an interaction of the radiation (11) with the object (2) and to generate according detection signals, and an evaluation unit (25) configured to derive infor-mation regarding at least one property of the object (2) from the detection signals and/or to generate a spatial and/or spatio-temporal distribution of the detection sig-nals or of information derived from the detection signals obtained for the at least one region or point of interest (20) located on and/or within the object (2).

A sample classification device including a carrier, a first detection module, and a sample pipeline is provided. The first detection module includes a first light-emitting device, a second light-emitting device, and a first optical sensing device. The first light emitting device is located on the carrier and used to emit light of a first wavelength. The second light emitting device is located on the carrier and used to emit light of a second wavelength. The first wavelength is different from the second wavelength. The first optical sensing device is located on the carrier and between the first light emitting device and the second light emitting device. The sample pipeline is located above the carrier and passes above the first optical sensing device.

An apparatus and method of inline measurement of low-concentration hydrocarbons overlaps fluorescence, scatter and absorption spectroscopy devices so as to measure scatter and absorption of fluorescing oil and the excited fluorescence itself. The apparatus includes a fitting, an input port, an output port, and a sapphire tube having a hollow interior in fluid connection with the input port and the output port. Flow medium passes through the input port, the sapphire tube, and the output port. The apparatus also includes a light emitter, a first detector, and a second detector. The light emitter can include a lens, an absorption and scatter wavelength emitter, and a fluorescence wavelength emitter. An incident absorption and scatter beam and an incident fluorescence beam from the light emitter and parallel so as to determine free hydrocarbon, dissolved hydrocarbons, and solids in a sample within the sapphire tube.

Methods, apparatus, and systems provide improved identification of selected biohazard and/or biohazard signatures from complex in vivo or in vitro samples and include deep UV native fluorescence spectroscopic analysis for multiple locations of a sample wherein classification results for individual locations are combined and spatially correlated to provide a positive or negative conclusion of biohazard signature presence (e.g., for signatures for viruses, bacteria, and diseases including SARS-CoV-2 and its variants and COVID-19 and its variants). Improvements include one or more of reduced sample processing time (minutes to fractions of a minute), reduced sampling cost (dollars to fractions of a dollar), high conclusion reliability (rivaling real time RT-PCR). Some embodiments may incorporate a stage or scanning mirror system to provide movement of a sample relative to an excitation exposure location. Some embodiments may incorporate Raman or phosphorescence spectroscopic analysis as well as imaging systems.

Embodiments herein relate to water in fuel sensing systems that can be mounted on-vehicle. In an embodiment, a water in fuel sensing system is included having a light source, a light detector, and a sensor controller, wherein the sensor controller is in signal communication with the light detector and the sensor controller is configured to evaluate signals received from the light detector, identify water droplets based on the signals received from the light detector, record information regarding the classified water droplets, and generate an estimate of an amount of water in a fuel. Other embodiments are also included herein.

A sample classification device including a carrier, a first detection module, and a sample pipeline is provided. The first detection module includes a first light-emitting device, a second light-emitting device, and a first optical sensing device. The first light emitting device is located on the carrier and used to emit light of a first wavelength. The second light emitting device is located on the carrier and used to emit light of a second wavelength. The first wavelength is different from the second wavelength. The first optical sensing device is located on the carrier and between the first light emitting device and the second light emitting device. The sample pipeline is located above the carrier and passes above the first optical sensing device.