A system and method for performing UV LED-based absorption detection for capillary liquid chromatography for detecting and quantifying compounds in a liquid, wherein a simplified system eliminates the need for a beam splitter and a reference cell by using a stable UV source, and power requirements are reduced, resulting in a portable and substantially smaller system with relatively low detection limits.

A light-emission-side prism accommodates a light-emitting element and is disposed in a light-emission guide hole extending in a light-emission axis direction. A light-reception-side prism accommodates a light-receiving element and is disposed in a light-reception guide hole extending in a light-reception axis direction. The light-emission-side prism has a total-reflection surface that causes light from the light-emitting element to be directed in the light-emission axis direction and a lens surface that causes light emitted from the total-reflection surface to be condensed. The light-reception-side prism includes a lens surface that causes scattered light entering from a smoke monitoring area in the light-reception axis direction to be condensed and a total-reflection surface that causes light condensed by the lens surface to be directed toward the light-receiving element.

A toner detection unit (optical sensor) includes a first light receiving element configured to receive specular reflection light of first irradiating light, and a second light receiving element configured to receive diffused reflection light of second irradiating light, and a separation component configured to separate irradiating light emitted from an LED into the first and second irradiating light. A housing forms a first opening through which the first irradiating light and the second irradiating light pass and the diffused reflection light to be received by the second light receiving element passes, and a second opening through which the specular reflection light to be received by the first light receiving element passes.

Systems and methods are provided for a UV-VIS spectrophotometer, such as a UV-VIS detector unit included in a high-performance liquid chromatography system. In one example, a system for the UV-VIS detector unit may include a first light source, a signal detector, a flow path positioned intermediate the first light source and the signal detector, a second light source, and a reference detector. The first light source, the signal detector, and the flow path may be aligned along a first axis, and the second light source and the reference detector may be aligned along a second axis, different than the first axis.

A flow cell device including a spherical optical element is disclosed. The spherical lens can be sealed to the body of the flow cell device in a manner that provides external optical access to a fluid in an analysis region of a flow path through the flow cell device. The seal can be provided by an elastomer, a polymer, or a deformable metal. The disposition of the spherical lens to the flow path enables in situ optical analysis of the fluid. An optical analysis device can be removably connected to the flow cell device to provide the optical analysis. In some embodiments the optical analysis device is a portable Raman spectrometer. The flow cell device can provide a supplementary interrogation interface, and/or an on board sensor device(s) to enable multivariate analysis and/or advanced triggering.

A sensor that preferably senses NO2.

A transmitted light intensity measurement unit for measuring a concentration of fluid flowing through a duct comprises: a light source for supplying light into the duct from a light supply part on a surface of the duct; a light receiving element for receiving the light, which has been passed from the light supply part through the duct wall and the fluid inside the duct, at a light receiving part located on an opposite side in a diametrical direction of the duct relative to the light supply part, and outputs a signal indicating an intensity of the light; and a light-transmissive member disposed on at least one light path among a light pass between the light source and the light supply part and a light pass between the light receiving element and the light receiving part, abutting and closely contacting the duct wall by an elastic deformation of the duct wall.

A well plate cover includes a base defining a base plane, and a plurality of insertion elements. At least a portion of each of the insertion elements is transparent. Each of the insertion elements is coupled to the base, and extends, in a direction orthogonal to the base plane, from the base to a distal end surface of the insertion element. The distal end surface of each of the insertion elements includes an apex that, when the respective insertion element is inserted into a well of a well plate, extends further into the well than any other portion of the distal end surface. The apex is a point, a line, or a plane having a diameter that is less than one half of a maximum diameter of the distal end surface.

A device for optically identifying surfaces, in particular for optically identifying structured and/or pictorial surfaces, spaces and/or e.g. paintings or sculptures is simple to use independently of the location. For this purpose, the device includes a housing in which light-emitting and light-receiving elements are arranged, and the device also includes a first portion having at least one lens, a portion that follows the first portion in the longitudinal direction and has a screen, and an adjoining handle portion.

A well plate cover includes a base defining a base plane, and a plurality of insertion elements. At least a portion of each of the insertion elements is transparent. Each of the insertion elements is coupled to the base, and extends, in a direction orthogonal to the base plane, from the base to a distal end surface of the insertion element. The distal end surface of each of the insertion elements includes an apex that, when the respective insertion element is inserted into a well of a well plate, extends further into the well than any other portion of the distal end surface. The apex is a point, a line, or a plane having a diameter that is less than one half of a maximum diameter of the distal end surface.