The present invention brings an actual concentration of a process gas closer to an ideal concentration, and a gas analysis device that is used in a fluid control system that controls a process gas obtained by vaporizing a liquid material or a solid material, the gas analysis device including: a first concentration calculation unit that calculates a concentration of the process gas; a second concentration calculation unit that calculates a concentration of a by-product gas at least generated in a side reaction that is a reaction different from a main reaction for generating the process gas; a comparison unit that compares a first actual concentration that is the concentration of the process gas calculated by the first concentration calculation unit with a first ideal concentration, and compares a second actual concentration that is the concentration of the by-product gas calculated by the second concentration calculation unit with a second ideal concentration.

The present invention brings an actual concentration of a process gas closer to an ideal concentration, and a gas analysis device that is used in a fluid control system that controls a process gas obtained by vaporizing a liquid material or a solid material, the gas analysis device including: a first concentration calculation unit that calculates a concentration of the process gas; a second concentration calculation unit that calculates a concentration of a by-product gas at least generated in a side reaction that is a reaction different from a main reaction for generating the process gas; a comparison unit that compares a first actual concentration that is the concentration of the process gas calculated by the first concentration calculation unit with a first ideal concentration, and compares a second actual concentration that is the concentration of the by-product gas calculated by the second concentration calculation unit with a second ideal concentration.

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.

Build material handling unit for a powder module 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 which can be consolidated by means of an energy source, wherein the build material handling unit is coupled or can be coupled with a powder module, wherein the build material handling unit is adapted to level and/or compact a volume of build material arranged inside a powder chamber of the powder module by controlling the gas pressure inside the powder chamber.

Build material handling unit for a powder module 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 which can be consolidated by means of an energy source, wherein the build material handling unit is coupled or can be coupled with a powder module, wherein the build material handling unit is adapted to level and/or compact a volume of build material arranged inside a powder chamber of the powder module by controlling the gas pressure inside the powder chamber.

The invention provides a device and method for the real-time detection of aeropathogens. The device includes an aerosampler having an air inlet and at least one collector tube, a microfluidic system which includes a container, piping, a micro pump for flowing a liquid and a viral detection chamber. The viral detection chamber has an electrode which may be equipped with functionalized bio sensors, a counter electrode, an electronic detection system connectable to the electrodes of the viral detection chamber, and an embedded electronic processing system for processing data from the electronic detection system.

The invention provides a device and method for the real-time detection of aeropathogens. The device includes an aerosampler having an air inlet and at least one collector tube, a microfluidic system which includes a container, piping, a micro pump for flowing a liquid and a viral detection chamber. The viral detection chamber has an electrode which may be equipped with functionalized bio sensors, a counter electrode, an electronic detection system connectable to the electrodes of the viral detection chamber, and an embedded electronic processing system for processing data from the electronic detection system.

The present invention discloses a device for measuring adsorption/desorption of contaminants onto surface bed sediments and a method of using the device. The measurement device includes a sediment sample disc, a sample holder, a reaction cylinder, a liquid collection cylinder, and a liquid circulating member from inside to outside, the liquid circulating member consisting of rubber pipes and a peristaltic pump. According to the method of using the device for measuring the adsorption/desorption of contaminants onto surface bed sediments, the full contact of bed sediments with pore water and the full exchange of overlying water with pore water are realized through liquid circulation without changing the arrangement modes of the bed sediments; any thickness of bed sediments can be performed on experiments, particularly for thin-layer bed sediments; and natural permeation and accelerated permeation of pore water through bed sediments can be switched simply by adjusting the flow rates of the peristaltic pump and by opening/closing of vent holes. Adsorption characteristic parameters obtained through the device and the method provide, for water quality models, data support which conforms to the natural existing condition of bed sediments and is more scientific and reasonable, and the device and the method achieve significant environmental benefits.

The present invention discloses a device for measuring adsorption/desorption of contaminants onto surface bed sediments and a method of using the device. The measurement device includes a sediment sample disc, a sample holder, a reaction cylinder, a liquid collection cylinder, and a liquid circulating member from inside to outside, the liquid circulating member consisting of rubber pipes and a peristaltic pump. According to the method of using the device for measuring the adsorption/desorption of contaminants onto surface bed sediments, the full contact of bed sediments with pore water and the full exchange of overlying water with pore water are realized through liquid circulation without changing the arrangement modes of the bed sediments; any thickness of bed sediments can be performed on experiments, particularly for thin-layer bed sediments; and natural permeation and accelerated permeation of pore water through bed sediments can be switched simply by adjusting the flow rates of the peristaltic pump and by opening/closing of vent holes. Adsorption characteristic parameters obtained through the device and the method provide, for water quality models, data support which conforms to the natural existing condition of bed sediments and is more scientific and reasonable, and the device and the method achieve significant environmental benefits.