A system for measuring the mass concentration of dust particles includes data transfer device with dust particles mass concentration meter located inside the device. The meter includes a housing of the meter, a printed circuit board with a microcontroller, at least two dust sensors and output interface of the meter connected to them. The data transfer device additionally includes a heating element and a fan, which are electrically connected to the microcontroller, at least one inlet channel connected to the dust sensors, at least one outlet channel and at least one inlet stream temperature sensor. A method for measuring the mass concentration of dust is also provided.

A detector comprising an analytical apparatus for detecting a substance of interest, and a detector inlet. The detector inlet comprises a flow passage for carrying a flow of fluid, the flow passage comprising a sampling volume, and a sampling inlet adapted to collect samples of the fluid from the sampling volume as the fluid flows past the sampling inlet, and to provide the samples to the analytical apparatus, wherein the flow of fluid carries particulates. The detector inlet also comprises a flow director arranged to vary a spatial distribution of the particulates carried by the fluid to increase a relative proportion of the particulates carried past the sampling inlet along the flow passage without entering the sampling volume.

A gas collection device is installed in a toilet including a toilet seat and a toilet bowl. The gas collection device includes a flow path connected to a predetermined tank, and an introduction portion that introduces a sample gas into the flow path. The introduction portion is located between the toilet seat and the toilet bowl, or located inside or above the toilet seat. The introduction portion does not protrude toward an inside of the toilet bowl from a rim portion of the toilet bowl when located between the toilet seat and the rim portion. The introduction portion does not protrude toward the inside of the toilet bowl from the toilet seat when located inside or above the toilet seat.

An air quality and particulate detection system comprising: an air quality and particulate detector comprising a particulate detection chamber in fluid communication via an orifice with an adjacent air quality member, the particulate detection chamber comprising a blower adjacent to a particle filter and a laser source, and the air quality member comprising a channel having substantially parallel sides for operably coupling a HEPA filter adjacent and substantially parallel to the orifice, and for operably coupling one or more ultraviolet light emitting diodes (LEDs) downstream from the HEPA filter, and an exhaust pipe for returning treated air to a protected area; one or more pipe runs fluidly connected to the particulate detection chamber, wherein each of the one or more pipe runs includes one or more sampling points configured to allow air particulate entry from the protected area, into at least one of the one or more pipe runs.

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.

A device for detecting gas and controlling volume of clean gas includes a gas detection module and a gas guider. The gas detection module includes a control circuit board, a gas detection main part and a microprocessor, wherein the gas detection main part detects a gas to generate a signal and transmits the signal to the microprocessor for calculating and processing so as to generate a gas detection data, and the microprocessor outputs a power signal and a pulse-width modulation (PWM) signal according to the gas detection data. The gas guider receives the power signal and the PWM signal outputted by the microprocessor, the gas guider is enabled or disabled, as well as a rotation speed and an output volume of clean gas of the at least one gas guider are adjusted according to the power signal and the PWM signal.

A system and methods of tracking and identifying airborne particles using sensing devices that may include a fan and a collection plate. The fan forces air through the sensing device and airborne particles onto the collection plate. An imaging device captures images of the particles on the collection plate for analysis and identification. An image processing device determines pre-identified particles in the images. The images of other particles are processed and identified by a neural network processing device. Recommendations based on particle counts are provided to a user device. The user device may automatically control one or more devices in response to the recommendations.

A device is described for collecting samples of microorganisms in the air, such as bacteria, fungi, viruses, including SARS-CoV-2; intuitive to use, portable, and does not require specific technical knowledge to handle. The device works through an air flow sucked in by a centrifugal fan, where a filter retains the microorganisms for later use in diagnostic laboratories.

Ion modification An ion mobility spectrometer (100) comprising a sample inlet (108) comprising an aperture arranged to allow a sample of gaseous fluid to flow from an ambient pressure region to a low pressure region of the ion mobility spectrometer to be ionised; a controller (200) arranged to control gas pressure in the low pressure region to be lower than ambient pressure; and an ion modifier (126, 127, 202) configured to modify ions in the low pressure region, wherein the ions are obtained from the sample of gas.

Provided are a gas sensor system, a gas sensor control device, and a control method that enable high-accuracy measurement without causing a user to wait. The gas sensor system (1) includes: a gas sensor (10) that performs concentration measurement of a measurement target gas in air; a heater (17) that heats the gas sensor; an air intake port (11) and an air discharge port (12) that are connected to the gas sensor; and a control device (20) that performs heating control of operating the heater so as to heat the gas sensor. The control device acquires temperature information for the gas sensor and temperature information for a space from which the air intake port takes in air and performs the heating control based on the temperature information for the gas sensor and the temperature information for the space from which the air intake port takes in air.