A biological material measuring instrument is described. The biological material measuring instrument includes a rotating body and a main body. The rotating body includes one or more cartridge holders having cuvettes in which a reagent and an analyte in a sample react. The main body includes a pair of light-emitting parts and light-receiving parts to optically measure the analyte in the sample. The rotating body further includes a light-emitting optical waveguide for guiding the light of the light-emitting parts to the cuvette and a light-receiving optical waveguide for guiding.

A measuring apparatus for measuring a spectrum of a gaseous sample includes a tunable laser light source to provide an illuminating light beam, a sample cell with an inner surface to provide scrambled light that is transmitted through the gaseous sample, a detector to detect intensity of transmitted scrambled light and a pressure control system to maintain an absolute pressure of the gaseous sample smaller than 50 kPa inside the sample cell to reduce spectral widths of spectral features of the gaseous sample. The measuring apparatus measures spectral transmittance values of the sample by modulating the spectral position of the illuminating light, and detecting the intensity of the transmitted light at different spectral positions. The divergence of the illuminating light beam in a transverse direction is greater than 20° to cause multiple consecutive reflections of the scrambled light from the inner surface.

A biological material measuring instrument is described. The biological material measuring instrument includes a rotating body and a main body. The rotating body includes one or more cartridge holders having cuvettes in which a reagent and an analyte in a sample react. The main body includes a pair of light-emitting parts and light-receiving parts to optically measure the analyte in the sample. The rotating body further includes a light-emitting optical waveguide for guiding the light of the light-emitting parts to the cuvette, and a light-receiving optical waveguide for guiding.

The present disclosure describes an apparatus, method, system, and computer program product of identifying a cuvette for measuring light scattering of a sample. In an exemplary embodiment, the apparatus includes at least one sensor configured to detect at least one shape feature of a cuvette, and an insulating block configured to maintain a temperature of the at least one sensor within an operating temperature range of the at least one sensor. In an exemplary embodiment, the method, system, and computer program product include receiving a first set of signals from a first sensor directed to a cuvette, receiving a second set of signals from a second sensor directed to the cuvette, and executing a set of logical operations detecting a shape feature of the cuvette.

Fluid processing tube for use in optical analysis comprising at least one first portion being made from a first material suitable for optical analysis and being configured to include two optical paths of different lengths, and at least one second portion connected to said first portion and being made from a second material different from said first material.

A microfluidic apparatus has a microchannel that includes at least one vertically oriented segment with a top section having a relatively wide opening and a bottom section having a relatively narrow opening. The top section is larger in volume relative to the bottom sections, and the middle sections taper down in at least one dimension from the top section to the bottom section. One or tens or hundreds of vertically-oriented segments may be provided, and they are fluidly coupled to each other. Each segment acts as a pressure-volume-temperature (PVT) cell, and the microchannel apparatus may be used to determine a parameter of a fluid containing hydrocarbons such as the dew point of the fluid or the liquid drop-out as a function of pressure.

An analysis tool for use mounted to an analysis device that automatically analyzes a specified component contained in a sample. The analysis tool includes a light measurement well to hold a measurement solution as a measurement subject, and to measure the measurement solution. The light measurement well includes an opening to dispense the measurement solution through, a measurement solution holder to hold the measurement solution dispensed through the opening, and an emission section that emits measurement light caused to be emitted from the measurement solution held in the measurement solution holder in a light receiving direction of the analysis device. The measurement light is fluorescent light or chemiluminescent light. The measurement solution holder has a flattened profile that is flattened in the light receiving direction.

A solution for evaluating a sample gas for a presence of a trace gas, such as ozone, is provided. The solution uses an ultraviolet source and an ultraviolet detector mounted in a chamber. The chamber can include reflecting walls and/or structures configured to guide ultraviolet light. A computer system can operate the ultraviolet source in a high power pulse mode and acquire data corresponding to an intensity of the ultraviolet radiation detected by the ultraviolet detector while a sample gas is present in the chamber. Using the data, the computer system can determine a presence and/or an amount of the trace gas in the sample gas.

A capillary cell is described along with an arrangement and a method for receiving, positioning and examining a microscopic specimen, in particular a cleared fluorescent specimen with the help of a single-plane fluorescence microscope. The capillary cell is suitable for being positioned in a chamber volume and contains a capillary section, which comprises a wall. The wall encloses a specimen volume and is planar and transparent in at least some sections. In addition, the capillary cell includes an upper and a lower closure section, which are connected to the capillary section and which seal the capillary section. The specimen volume is separated from the chamber volume by the capillary section, the upper closure section and the lower closure section.

The invention relates to a flow cell for absorption detection, in which a tube through which flow is to pass is held at its opposite ends in a supporting flange in each case and is suspended in a substantially cantilevered manner, the two supporting flanges being connected rigidly to each other in order to avoid stresses accidentally introduced into the tube.