An air sampling device and method of sampling air. The device has a housing body and a retaining assembly for a sampling device. A plenum has a top end coupled to the housing body about an opening such that the plenum is in flow communication with the opening and receives air flow generally from the top end to the bottom end generally along the longitudinal length thereof. A flow connection is coupled to the bottom end of the plenum. A mass flow meter has an input coupled to the flow connection and is in flow communication with the plenum via the flow connection. A blower is configured to draw air past the sampling device, through the opening, and through the plenum, such that a measuring portion of the air flows through the flow connection and through the mass flow meter, which measured the flow rate of the measuring portion.

An air sampling system is disclosed. The air sampling system includes: an air inflow channel having an air inlet portion at a top end, the air inflow channel being oriented substantially vertically; a fan configured to cause air in a sampling environment to flow into the air inflow channel via the inlet portion; a cooling unit for cooling air in the air inflow channel, the cooling unit disposed downstream of the inlet portion; a collection chamber for collecting liquid water condensed from air in the air inflow channel, the collection chamber being fluidly connected to the air inflow channel; and a sensing unit for determining a volume of liquid in the collection chamber, wherein the cooling unit is controlled in response to signals generated by the sensing unit.

The following is an apparatus and a method that enables the automated collection and identification of airborne particulate matter comprising dust, pollen grains, mold spores, bacterial cells, and soot from a gaseous medium comprising the ambient air. Once ambient air is inducted into the apparatus, aerosol particulates are acquired and imaged under a novel lighting environment that is used to highlight diagnostic features of the acquired airborne particulate matter. Identity determinations of acquired airborne particulate matter are made based on captured images. Abundance quantifications can be made using identity classifications. Raw and summary information are communicated across a data network for review or further analysis by a user. Other than routine maintenance or subsequent analyses, the basic operations of the apparatus may use, but do not require the active participation of a human operator.

Disclosed is a dynamic demonstration method for water-soluble ion concentration and components of an aerosol. The method comprises: obtaining concentration data of each ion in an atmospheric aerosol of a target city in a preset time period and filling the concentration data in a data table; obtaining vertex coordinates of each ion in a Maucha graph according to equivalent concentration data of each ion; drawing an aerosol ion Maucha graph of the target city in each preset time period according to the vertex coordinates; and finally making a dynamic picture according to a temporal graph of aerosol ion concentration in various time periods.

A device for detecting a content of critical gas in a mining chamber of a tunnel boring machine includes a separation module by which a fluid fed in via an extraction line connection is cleaned of solid and liquid components. A gas line arrangement arranged downstream of the separation module in the flow direction of the fluid carries the fluid, including substantially only gaseous components, through a pressure reducer and through a flow control valve of a metering module by which the gas to be analyzed can be delivered in a controlled manner assisted by a double diaphragm pump and a pressure stabilizer to a gas analysis unit even at high pressures in the cavity.

A method of analysis using mass spectrometry and/or ion mobility spectrometry is disclosed. The method comprises: using a first device to generate smoke, aerosol or vapour from a target comprising or consisting of a microbial population; mass analysing and/or ion mobility analysing said smoke, aerosol or vapour, or ions derived therefrom, in order to obtain spectrometric data; and analysing said spectrometric data in order to analyse said microbial population.

A sampling device is constructed having an airflow path from a size-selective inlet to a device outlet, without using any tubing. The size-selective inlet includes at least one of an impactor, a filter, a cyclone, and an inhalable inlet. The device includes a sampling assembly configured to be removably coupled directly to a sampling device housing (e.g., without using tubing), and an airflow assembly that may be constructed without using tubing.

A real-time measuring device of oxygen concentration in a droplet environment, comprising: a measurement pipeline, a gas-liquid separation structure installed inside a side of the gas inlet of the measurement pipeline, a pressure sensor, a zirconia oxygen concentration sensor with a builtin thermal resistor, a digital signal converter, a signal amplifier and a signal processing unit sequentially installed at the gas outlet of the measurement pipeline, wherein the pressure sensor, the thermal resistor and the zirconia oxygen concentration sensor are connected to the digital signal converter and the signal amplifier, respectively, and the signal processing unit obtains the amplified and AD converted zirconia oxygen concentration sensing signal, pressure sensing signal and the temperature sensing signal and calculates real-time oxygen concentration.

The invention relates to a method and a system for analyzing rare gases present in a gaseous fluid (1). According to the invention, initially, the rare gases are extracted from the gaseous fluid by trapping by means of a getterizing substrate (5), then superconcentration of the rare gases is produced before injection (8) into the measuring instruments (9). By virtue of the invention, it is possible to increase the partial pressure of the rare gases in the gases to be analyzed before their injection into the analysis instruments.

A method for collecting and analysing airborne particles, including a step of eluting particles precipitated on a collecting surface, a step of analysing the airborne particles collected in the reaction chamber, the eluting step being carried out by heating a first reservoir containing the elution liquid to a first temperature value, the analysing step being carried out by heating the reaction chamber to a second temperature value higher than the first temperature value, so as to: activate a detection reaction in the reaction chamber, isolate the reaction chamber during the detection reaction, initiate a device for sealing the reaction chamber, a step of sealing the reaction chamber.