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.

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.

According to an example aspect of the present invention, there is provided an apparatus comprising a volume for receiving a gas sample; and an ultrasonic transducer; wherein the ultrasonic transducer is caused to generate a standing wave to the volume, said standing wave comprising at least one particle trapping zone for trapping particles carried by the gas sample, and to release particles trapped to the at least particle trapping zone by decreasing power of the standing wave to at least one lower power level and/or switching off the standing wave.

According to an example aspect of the present invention, there is provided an apparatus comprising a volume for receiving a gas sample; and an ultrasonic transducer; wherein the ultrasonic transducer is caused to generate a standing wave to the volume, said standing wave comprising at least one particle trapping zone for trapping particles carried by the gas sample, and to release particles trapped to the at least particle trapping zone by decreasing power of the standing wave to at least one lower power level and/or switching off the standing wave.

Filter assemblies and components therefor, are described. In an example arrangement, the crankcase ventilation filter assembly is configured to be serviced from either the top or the bottom. A rotational indexing arrangement is to ensure appropriate orientation of an internally received filter cartridge, and other components of the arrangement are provided. Methods of assembly, servicing and use are described.

A single disposable cartridge for performing a process on a particle, such as particle sorting, encapsulates all fluid contact surfaces in the cartridge for use with microfluidic particle processing technology. The cartridge interfaces with an operating system for effecting particle processing. The encapsulation of the fluid contact surfaces insures, improves or promotes operator isolation and/or product isolation. The cartridge may employ any suitable technique for processing particles.

A gas fixture safety cover comprising: a plurality of walls, and a plurality of nozzle slots located in the walls, and plurality of handle slots located in the walls, the walls and slots configured to allow the gas fixture safety cover to slide over a gas fixture and abut a countertop if all of the gas valve handles are in an off position, and further configured to prevent the gas fixture safety cover from sliding over a gas fixture and abutting a counter top if any of the gas valve handles are in a turned on position.

A sulfur chemiluminescence detector 200 includes: a heating furnace including a gas passage having first and second supply ports, and a heater configured to heat the gas passage; an oxidation-reduction gas supply unit configured to supply, to the gas passage, an oxidizing-agent gas through the first supply port and a reducing-agent gas through the second supply port; a reaction cell configured to make a sample gas that has passed through the gas passage react with ozone; an ozone supply unit configured to supply the ozone into the reaction cell; a vacuum pump connected to the reaction cell; a photodetector configured to detect light generated inside the reaction cell; a signal receiving unit configured to receive a shutdown signal; and a shutdown functioning unit configured to control each unit to automatically stop supplying the reducing-agent gas and the oxidizing-agent gas by the oxidation-reduction gas supply unit, heating the gas passage by the heater, supplying the ozone by the ozone supply unit, and evacuating by the vacuum pump, upon the shutdown signal being received by the signal receiving unit.

A sulfur chemiluminescence detector 200 includes: a heating furnace including a gas passage having first and second supply ports, and a heater configured to heat the gas passage; an oxidation-reduction gas supply unit configured to supply, to the gas passage, an oxidizing-agent gas through the first supply port and a reducing-agent gas through the second supply port; a reaction cell configured to make a sample gas that has passed through the gas passage react with ozone; an ozone supply unit configured to supply the ozone into the reaction cell; a vacuum pump connected to the reaction cell; a photodetector configured to detect light generated inside the reaction cell; a signal receiving unit configured to receive a shutdown signal; and a shutdown functioning unit configured to control each unit to automatically stop supplying the reducing-agent gas and the oxidizing-agent gas by the oxidation-reduction gas supply unit, heating the gas passage by the heater, supplying the ozone by the ozone supply unit, and evacuating by the vacuum pump, upon the shutdown signal being received by the signal receiving unit.

Build material handling unit (2) for a powder module (3) for an apparatus for additively manufacturing three-dimensional objects, which apparatus is adapted to successively layerwise selectively irradiate and consolidate layers of a build material (4) which can be consolidated by means of an energy source, wherein the build material handling unit (2) is coupled or can be coupled with a powder module (3), wherein the build material handling unit (2) is adapted to level and/or compact a volume of build material (4) arranged inside a powder chamber (5) of the powder module (3) by controlling the gas pressure inside the powder chamber (5).