A miniature gas detection system includes a separation flow channel fabricated by semiconductor processes and a filling material disposed in the main flow channel of the separation flow channel to perform adsorption and separation on compositions of compounds contained in the gas introduced into the main flow channel. Each detection flow channel is formed with a monitoring chamber, and a micro-electromechanical systems pump is formed on the bottom portion of the monitoring chamber. In each monitoring chamber, a light emitted from the light emitting element is reflected by the two mirrors and received by the light detection element. Therefore, the light detection elements obtain and output spectra of the compositions of compounds contained in the gas according to the differences in optical adsorptions of the compositions of compounds for lights with different wavelengths, so as to analyze and determine the type of the gas contained in the compositions of compounds.

A portable sampling device includes a sampling housing at least partially enclosing an inner chamber; at least one pumping element disposed within the inner chamber and configured to facilitate airflow through the device; and at least one gas sensor disposed within the inner chamber and configured to detect and/or characterize one or more gases in the airflow.

An air sample collection apparatus and methods for operating the air sample collection apparatus are provided. The air sample apparatus comprises a plurality of air canisters comprising at least a first canister and a second canister, a multi-position valve comprising an outlet, and an inlet region, which are fluidly connected to a plurality of ports. Each respective port is fluidly connected to a canister of the plurality of air canisters, a pump operable to provide pressurized sample air to the inlet region of the multi-position valve, and a computing device operable to open and close each respective port fluidly coupled to each canister of the plurality of canisters.

One variation of a pathogen detection system includes an air sampler and a cartridge. The air sampler includes: a housing defining an inlet and an outlet; a tunnel arranged within the housing and extending between the inlet and the outlet; a charge electrode arranged within the tunnel proximal the inlet; a cartridge receptacle arranged proximal the outlet and comprising a cartridge terminal; and a power supply configured to drive a voltage between the charge electrode and the cartridge terminal. The cartridge includes: a substrate; a collector plate arranged on the substrate and configured to collect charged bioaerosols moving through the tunnel; and a connector configured to transiently engage the cartridge receptacle to locate the substrate and the collector plate within the tunnel and electrically couple the collector plate to the cartridge terminal.

A process for testing an air source by providing a bag to collect a sample of gas. Connecting the filled bag to a collector assembly that has a fraction of the interior volume of the bag. Forcing the air sample from the bag over a media dish inside the collector assembly. Removing the media for further analysis. Both the bag and the collector assembly have one way exhaust valves to prevent over-pressure and allow a limited flow through of the sample.

An air sampling actuator and associated method are disclosed. The air sampling actuator may include a housing configured to mount on a canister, a motor configured to be accommodated in the housing, and an adaptor. The motor may generate a mechanical action, in response to a control signal received by the motor. The adaptor may be coupled to the motor and configured to interface with a valve-controlling knob of the canister. In a first configuration of the air sampling actuator, the adaptor may be uncoupled from the valve-controlling knob of the canister, and the hook portion may be unengaged with the canister. In a second configuration of the air sampling actuator, the adaptor may be coupled with the valve-controlling knob of the canister, and the hook portion may be engaged with the canister.

According to an embodiment, it is a system, comprising, a specialized device comprising, a flow sub-system configured for sampling a gas sample, a gas chamber having a gas sensor array comprising a configurable sensor interface, wherein the specialized device is operable to collect an aroma signal from the gas sample, a microcontroller comprising a processor and a memory operable to digitalize the aroma signal to obtain aroma data, store and transfer an aroma data, perform an aroma analysis on the aroma data, and provide a feedback to a user, wherein the system is an aroma evaluation system operable to detect a target aroma in real-time, and wherein the system is operable to interface to at least one of a cloud platform and a smartphone.

Embodiments generally relate to a device for housing chemical vapour sampling material. The device comprises a housing comprising a barrel, the barrel being configured to hold at least one fibre of chemical vapour sampling material, the barrel having a first opening at a first end configured to deploy at least a portion of the at least one fibre of chemical vapour sampling material; an extension mechanism arranged to cause extension and retraction of the at least one fibre of chemical vapour sampling material from the housing via the first opening; the extension mechanism being operable by actuation of at least one actuator. Actuating the at least one actuator causes extension or retraction of the at least one fibre of the chemical vapour sampling material from the housing via the first opening.

A automated multiple air sampler comprising a pump connected to a manifold, the manifold branching off to a plurality of conduits, each of the conduits connected to a corresponding cassette via a corresponding valve element, each cassette comprising an inlet exposed to the ambient air, an outlet fluidly connected to the conduit, and a filter element between the inlet and the outlet and a controller configured to open and close the valve elements independently from one another. The air sampler permitting sampling ambient air by receiving a indication that the ambient air is to be sampled, the controller operating one of the valve elements, including opening the valve element and closing the valve element, receiving another indication that the ambient air is to be sampled, the controller repeating the step of operating for another one of the valve elements, and tracking the operation of the valve elements.

A particle sensing device is disclosed for sensing particles entrained in a gas, distribution of particle sizes including a first size range (e.g. PM2.5) and a second size range (e.g. PM10), larger than the first size range. A thermophoretic impulse is applied to the entrained particles. The device has a a first sensor, downstream of the thermophoretic impulse region. The thermophoretic impulse, the flow of gas and gravity combine to cause at least some of the particles to follow respective trajectories within the sampling volume. An interception unit is interposed between the thermophoretic impulse region and the first sensor, to intercept the respective trajectories of particles of the second size range but not respective trajectories of particles of the first size range. The first sensor is located to intercept and detect the respective trajectories of particles of the first size range.