An embodiment of an analyzer is described that comprises a first conduit configured to channel an annular flow of a first gas; a second conduit positioned within the first conduit, where the outer dimension of the second conduit is separated from an inner dimension of the first conduit by a gap configured to channel an axial flow of a second gas; a reaction chamber fluidically coupled to the first conduit and the second conduit, where the reaction chamber comprises a window on a side opposite from an orifice of the first conduit into the reaction chamber; and a detector positioned adjacent to a side of the window opposite from the reaction chamber, wherein the detector is configured to receive light produced from a reaction of the first gas and the second gas in the reaction chamber.

This disclosure is directed to an improved extraction probe and method of operation for sampling combustion gases from a furnace or burner for sulfur selective detection. The extraction probe is comprised of at least one constrained reduction zone with at least one discontinuous sampling conduit made from at least one smooth refractory material. The configured assembly allows for controlled formation of species that facilitate transport of sulfur monoxide or its equivalent for enhanced detection and system performance of sulfur chemiluminescence detectors.

A component analysis system includes a gas chromatograph having a separation column, and a component detector, the component detector including an oxidation-reduction furnace that has a first flow path through which a gas including a sample component separated by the separation column flows, and oxidizes and reduces the sample component in the gas flowing through the first flow path, a reaction cell that has an inlet for the gas including the reduced sample component and generates a chemical reaction accompanied by emission of light with respect to the sample component introduced from the inlet, a photodetector that detects light generated in the reaction cell, and a holding member that holds the oxidation-reduction furnace and the reaction cell, and a downstream end of the first flow path and the inlet of the reaction cell are directly connected or connected via a second flow path.

The invention is directed to a method for chemiluminescent sulphur detection wherein the method comprises the following steps. (a) oxidation of a gaseous starting mixture comprising one or more sulphur compounds to obtain an oxidized gas mixture. (b) reduction of the oxidized gas mixture as obtained in step (a) to obtain a gaseous mixture of reduced sulphur compounds in the presence of a ceramic surface. (c) reacting the mixture of reduced sulphur compounds obtained in step (b) with ozone to obtain a sulphur compound in excited state and measuring a chemiluminescent emission of the sulphur compound in excited state to obtain a measure for the amount of sulphur compounds in the gaseous starting mixture. The ceramic surface in step (b) is a magnesium aluminium silicate comprising surface.

Plasma processing apparatus and associated methods for detecting air leak are provided. In one example implementation, the plasma processing apparatus can include a processing chamber to process a workpiece, a plasma chamber separated from the processing chamber by a separation grid, and an inductive coupling element to induce an oxygen plasma using a process gas in the plasma chamber. The plasma processing apparatus can detect afterglow emission strength from reaction between nitric oxide (NO) and oxygen radical(s) in a process space downstream to an oxygen plasma to measure nitrogen concentrations due to presence of air leak.

A cavity ring down measurement system comprising a light source in optical communication with a detector through an optical cavity wherein the detector is in electronic communication through a gating circuit with a first integrating circuit and a second integrating circuit, controlled to obtain a ring up signal simultaneous with a ring down signal of a plurality of ON-OFF cycles over a single period of time. A process to utilize the system is also disclosed.

Plasma processing apparatus and associated methods for detecting air leak are provided. In one example implementation, the plasma processing apparatus can include a processing chamber to process a workpiece, a plasma chamber separated from the processing chamber by a separation grid, and an inductive coupling element to induce an oxygen plasma using a process gas in the plasma chamber. The plasma processing apparatus can detect afterglow emission strength from reaction between nitric oxide (NO) and oxygen radical(s) in a process space downstream to an oxygen plasma to measure nitrogen concentrations due to presence of air leak.

An apparatus for receiving a chemical species is disclosed. The apparatus includes an emission block configured to receive a vapor phase chemical species that is excited by chemical reaction in the emission block to provide an excited species that emits light. The emission block has an interior portion having a surface. A coating is disposed over the surface and the coating reduces adsorption of the excited species onto the surface.

A switch cabinet for an exhaust-gas measurement installation includes a cabinet body with two side walls, a ceiling, a floor, a front side and a back wall, a door to close the front side, a measurement gas distributor arranged in the cabinet body with an outlet, a coupling element fastened to the measurement gas distributor to form the outlet, at least one measuring device arranged in the cabinet body with an inlet, and a coupling element fastened to the at least one measuring device to form the inlet. The inlet is connected to the outlet to provide a gas-tight connection. The measurement gas distributor moves relative to the cabinet body so that the coupling element fastened to the measurement gas distributor and forming the outlet can be connected by insertion to the coupling element fastened to the at least one measuring device and forming the inlet.

The present disclosure relates to a device in particular, a sensor for determining a measurand correlated with a concentration of an analyte in a measuring medium, including a housing that has a region provided for contacting the measuring medium, a fluid line arranged in the housing, an interface that is arranged within the region provided for contacting the measuring medium and has a first side which is in contact with the fluid line and a second side which is in contact with an environment of the housing in particular, with the measuring medium in contact with the housing, a first reservoir that is arranged in the housing and fluidically connected to the fluid line and which contains a reagent intended for contacting and/or interacting with the analyte, and a transport mechanism that is designed to transport reagent from the first reservoir into the fluid line.