A device for detecting particles in a lubricating oil of a machine, comprising a particle separator; at least one particle detector; a bypass conduit for the particle-concentrating oil, fluidly connected to an oil outlet of the particle separator, concentrating the particles; and wherein the at least one particle detector is operatively mounted on the bypass conduit so as to be able to detect particles in the bypass conduit.

Systems and methods are described for introducing an impingement gas and an enhancement gas to an aerosolized sample within a spray chamber. A system embodiment includes, but is not limited to, a chamber body; an input port coupled to the chamber body, the input port configured to receive an aerosolized sample and direct the aerosolized sample into the chamber body; an exit port coupled to the chamber body, the exit port configured to receive at least a portion of the aerosolized sample from the chamber body; an impingement gas port coupled to the exit port and configured to introduce an impingement gas to the at least a portion of the aerosolized sample; and an enhancement gas port coupled to the exit port configured to introduce an enhancement gas to the exit port.

In a conventional fine particle detection device that vaporizes fine particles attached to the object of examination by heating, processing capability decreases as the processing time elapses due to the influence of deposition of fine particles other than the object of examination, dirt/dust, a residue of the fine particles as the object of examination, or residual matter. A fine particle detection device according to the present invention includes: a vaporization device that vaporizes the fine particles trapped by a trap device by vaporization or decomposition; a first flow passageway in which a mixture of a component vaporized by the vaporization device and another component flows; a second flow passageway branching from the first flow passageway in a direction of inertial force acting on the other component; a third flow passageway branching from the first flow passageway in a direction different from the direction of the inertial force; and an analysis device that analyzes a component introduced into the third flow passageway.

A dust sampling system including a dust sampler and a vehicle on which the dust sampler is placed. The dust sampler has a suction unit, a cyclone, a dust collection container, and an air intake conduit. The suction unit draws in air containing dust particles. The cyclone centrifugally separates the dust particles from the drawn-in air. The cyclone has an air input port, a particle discharge end, and an air output port connected to the suction unit. A dust collection container is positioned underneath the cyclone to receive the separated dust particles from the cyclone. The air intake conduit has an air inlet and an air outlet connected to the air input port of the cyclone. The suction unit draws in the air containing the dust particles into the air inlet of the air intake conduit while the vehicle moves to collect samples of fugitive dust from a road.

A system for detecting particles, including: a first device to measure concentration of particles, including an electrometer measuring device coupled to a charger and/or to an optical particle counter; a second device to measure concentration of particles, including a condensation nuclei counter; a calculation unit configured to calculate a ratio and/or a difference between a first measurement of the particle concentration in an airflow, to be performed by the first measurement device, and a second measurement of the particle concentration in an airflow, to be performed by the second measurement device, and configured to provide a comparison between the ratio and/or the difference between the first and second measurements and a threshold value to determine presence of particles of interest other than ambient air particles.

A gas component measuring device includes: a cyclone including a gas inlet; and a laser gas analyzer configured to take, in the cyclone, a measurement of a component of a subject gas that contains particulate matter and is introduced into the cyclone through the gas inlet.

An inlet or primary particle size fractionator for a direct-reading PM.sub.2.5 mass sensor described herein may remove atmospheric particles of a given size, such as particles greater than the inlet cut point (e.g., having a 10 μm AD cut point) and may transport particles less than the cut point to a mass sensing element or a secondary particle size fractionator (e.g., having a 2.5 μm AD cut point). The inlet may have a flow rate range of between 1 mL/min and 50 mL/min (or higher flow rates depending on the application). The inlet may include a virtual impactor (VI), real impactor, cyclone, or virtual cyclone (VC). A sensing element may measure particle mass below the primary particle size fractionator (e.g., 2.5 μm AD particles with a 10 μm AD cut point inlet) and/or between the size range of the primary and secondary particle size fractionators (e.g., between 2.5 μm and 10 μm AD, or coarse particles).

Disclosed herein are devices and methods 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 biosensors, 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.

Disclosed herein are devices and methods 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 biosensors, 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.

A system for collecting a biological sample from a passenger cabin includes a collector for collecting particulate samples positioned within at least one of an outlet flow path or a recirculation flow path. The system includes at least one of an outflow valve positioned in the outlet flow path downstream from the collector or a HEPA (high efficiency particulate air) filter positioned in the recirculation flow path downstream from the collector. A method for collecting particulates from cabin air includes capturing particulates in at least one of an outlet flow path or a recirculation flow path with a collector for a period of time, removing the collector from at least one of the outlet flow path or the recirculation flow path for testing, and inserting a clean collector into at least one of the outlet flow path or the recirculation flow path for use during another period of time.