168 results about "Air sampler" patented technology

A versatile remote slit impact air sampler controller system for the enhanced operative control of known slit impact air samplers, as well as other remote sampling devices that would benefit from an enhanced air-sampling platform. The described device will substantially enhance the functionality, versatility, and capabilities for the operation of the inventors remote slit sampling devices, adding substantial advances in data capture, maintenance, and output capabilities, user interface functionality, sampling period programmability and versatility, sample flow rate selectivity, air sampler selectivity, capture media turntable motor functionality, controller remote start capabilities, control system communication capabilities, and controller enclosure suitability.

A portable multi-tube air sampler device for capturing samples of trace elements in a suspected contaminated environment which includes a plurality of sample tubes for collecting sample trace elements, parallel inlet and outlet manifolds which minimize the length of the sample inlet path while utilizing short straight sample tubes, a hinged retainer bar mechanism which allows for easy removal and replacement of the various sample tubes, and a removably attachable controller unit which can be installed on the exterior portion of the carrying case for controlling the operation of the sampling protocol. Other embodiments include heated inlet manifold and sample intake paths to prevent contamination accumulation and carryover, a clean cycle option with a filter valved into the inlet flow path to enhance the purging cycle, and a mechanism for converting the present device to a desorbing auto sampler configuration. The present system likewise incorporates a purging cycle prior to each sampling cycle.

The invention discloses a timed passive air sampler, which comprises an air sampler main body, wherein the air sampler main body comprises a packaging barrel with an opening at the top, an adsorbent cage which is sheathed in the packaging barrel, a blocking pillar, an electromagnet and a timing driving circuit; a timing beginning sensor and a mounting bracket are arranged on the side wall of the packaging barrel; a rubber plug matched with the top of the packaging barrel is arranged at the top end of the adsorbent cage; a return spring is arranged between the bottom of the adsorbent cage and the bottom of the packaging barrel; a bayonet which can be pulled out to expose the packaging barrel and a sensing body corresponding to the timing beginning sensor are arranged on the adsorbent barrel; the blocking pillar is arranged on the mounting bracket and can move in the radial direction of the packaging barrel and be matched with the bayonet; the electromagnet is arranged on the outer wall of the bracket of the packaging barrel and can control the blocking pillar to be departed from the bayonet; and the timing driving circuit is connected with the timing beginning sensor and the electromagnet. The timed passive air sampler can implement the accurate automatic control of the sampling time, automatic packaging, and effectively improve the sampling accuracy of the passive air sampler.

A low-power gas chromatograph is provided including an optional air sampler module, an injector, an analytical column, a pulsed-flame photometric detector, and a computer system. The gas chromatograph of the present invention is designed for portable use such that the sensitive components of the system are mounted in a way that they are at least partially insulated against shock applied to the instrument. A rugged housing is provided such that the instrument can be used during field operations without destruction of sensitive components due to dropping and the like.

The invention discloses a time-sharing multiple-sample constant-temperature constant-current air sampler which comprises a single chip computer and two air paths, wherein the single chip computer is provided with a keyboard and a display; each air path comprises an air inlet, absorbing bottles, electromagnetic valves, a flow sensor, an air suction pump and an air vent which are connected sequentially. The air sampler is characterized in that each air inlet is connected with at least two absorbing bottles in parallel by a connecting pipe, wherein each absorbing bottle is connected with an electromagnetic valve in series and is communicated with a drying bottle; the absorbing bottles are arranged in a constant-temperature tank which is internally provided with a temperature sensor and a temperature controller; and the electromagnetic valves, the flow sensors, the temperature sensors, the temperature controllers and the air suction pumps are all electrically connected with the single chip computer. The sampler is connected with a plurality of absorbing bottles in parallel in one air path; the single chip computer is used for controlling the conversion of sampling branch air paths according to set conditions to finish the constant-temperature constant-current collection of multiple samples at time sharing by one air path; and the air sampler has accurate control, and saves labor force.

Air sampler with integrated airflow sensing. The air sampler according to at least some embodiments includes an air mover that is operable to move air over a sampling media. An integrated airflow sensor is in fluid communication with the air mover. The air mover operating speed can be adjusted, in example embodiments, by either a feedback control mechanism that is connected to the air mover and the integrated airflow sensor, by user input, or by a combination of the two. The feedback control mechanism adjusts the operating speed of the air mover in response to signaling from the integrated airflow sensor in order to maintain an actual airflow in accordance with a stored, target value. The feedback can, in at least some embodiments, compensate for obstructions, environmental variables, variations in the power supplied to the air mover, and the like.

The present invention discloses a low flow air sampler, which comprises a main box, a sampling pipe and the like, wherein the sampling pipe comprises a sampling cap, a cutting head, a sampling chamber and a sampling column for entrapping air particulates having the diameter of more than a preset equivalent diameter, capturing the currently-sampled air particulates, and synchronously collecting a gas-state sample, and the main box comprises a housing, a direct current power supply, a LCD display screen, a flow meter, a flow rate control device for controlling and adjusting the current sampling flow rate, and a main control circuit for controlling the flow rate control device to adjust the current sampling flow rate according to the set sampling conditions so as to control the sampling pipe to perform air sampling. According to the present invention, the air particulates and the gas-state sample can be synchronously collected, wherein the air particulate samples with different equivalent diameters can be screened and collected by controlling the flow rate, selecting the cutting heads with different pore sizes, and replacing the filtration membranes with different pore sizes while the gas-state sample is synchronously collected by using the capturing column, and the sampling functions such as wind direction setting, wind speed setting, temperature setting, humidity setting and the like are provided.

An adapter for use with a low volume PUF sampler is described. The adapter is affixed over the open end of a PUF (polyurethane foam) sample cartridge. Sample tubing is affixed to an aperture in the adapter, and the free end of the sample tubing is then positioned at a desired sample location such as within an aircraft interior. As a vacuum is applied to the PUF cartridge, the adapter allows air collected at the sample point to pass through the tubing and through the interior of the PUF cartridge while preventing air surrounding the PUF cartridge from being drawn into the PUF cartridge except through the sample tubing. In this manner the sample point of a desired air sample can be selected at a point remote from the PUF cartridge. Additionally, use of multiple PUF cartridges and adapters allows the simultaneous collection of separate air samples.

A device for capturing and concentrating volatile organic compounds (VOCs) in a sample of breath air. The device includes an intake for accepting an air sample; a disposable mouth piece; a sensor array for measuring physical parameters of the air sample; an exhaled air sampler for capturing a pre-determined volume of air; a concentrator for concentrating VOCs in the air sample; and an ionic liquid collector, the latter of which may be removed from the device. The ionic liquid collector, which may have one compartment or multiple compartments, includes at least one ionic liquid. Analysis of VOCs in the ionic liquid or liquids may identify biomarkers that can provide a medical diagnosis for a human patient based on a sample of breath air.

The invention generally provides devices and methods for sampling, detecting and/or characterizing particles, for example, via collection, growth and analysis of viable biological particles such as microorganisms. Devices and methods of the invention include particle samplers and impactors for collecting and/or analyzing biological particles in manufacturing environments requiring low levels of particles, such as cleanroom environments for electronics manufacturing and aseptic environments for manufacturing pharmaceutical and biological products, such as sterile medicinal products. Devices and methods of the invention incorporate an integrated sampler and impact surface, such as the receiving surface of a growth media, in a manner to minimize, or entirely eliminate, risks associated with user handling, such as the occurrence of false positive determinations due to contamination of the impact surface during particle sampling, growth or analysis processes.

The invention belongs to the technical field of gas detection, and discloses a GC-FID/MS-based method for detecting pollution features of VOCs in indoor air. According to the method, a Summa canisteris adopted for sampling and a GC-FID/MS coupling technique is adopted for analyzing components and concentrations of VOCs in indoor air; and a TH-3000BIV environmental air sampler is adopted for sapling and an acetylacetone spectrophotometric method is adopted for analyzing the content of formaldehyde in the indoor air. According to the method, the adopted GC-FID/MS coupling technique is capable of detecting more than 100 kinds of various VOCs via once sampling; compared with existing detection method, the method disclosed by the invention has the advantages that the data integrity and chromatographic resolution are remarkably improved ad the analysis is more comprehensive and correct; known from indoor pollution conditions, the concentrations of VOCs in indoor environments are gradually reduced along with the increase of decoration duration; and measures such as a pollution source treatment method, a ventilation method, a plant purification method, an adsorption purification method and the like are proposed to reduce the indoor air pollution.

An air sampler module is provided for use with a detection device that monitors liquids and/or solids on a surface using spectroscopy techniques. The air sampler module comprises a housing, an intake port for collecting air containing airborne threats to be analyzed by the detection device, and a port to permit communication of an optical transceiver of the detection device into the housing to permit analysis of the collected air. Thus, the capabilities of a spectroscopy detection system are expanded to include the ability to analyze airborne threats.

The invention relates to an atmospheric composition sampling system, and belongs to the technical field of atmospheric monitoring.The sampling system comprises a ground mobile power supply device, an aircraft and a sampling device, wherein the ground mobile power supply device and the aircraft are connected through a cable, and the sampling device is connected to the aircraft; a cable winding device used for cable winding and unwinding is arranged in the ground mobile power supply device, the sampling device comprises a controller, a rotary-type air collection mechanism which achieves positioning by means of a cradle head and a group of air samplers, the air samplers form a time-sharing and multi-parameter sampling mechanism to atmospheric compositions by means of control of the controller over the rotary-type air collection mechanism, and the air samplers have multiple types.When the sampling system works, multi-position and multi-item atmospheric composition sampling work can be achieved through one-time taking off, the efficiency is greatly improved, time intervals of sampling work between different positions are short, atmospheric composition data at different positions within a short time range can be provided, and the reference to research is good.

The invention discloses a PM2.5 (Particular Matter 2.5) single-grade atmosphere sampling cutter. The PM2.5 single-grade atmosphere sampling cutter is roughly cylindrical; the PM2.5 single-grade atmosphere sampling cutter comprises a cutting opening cover layer, an impacting nozzle layer, an impacting plate layer, a particular matter collecting layer, a gas organic pollutant collecting layer and a gas discharging layer, wherein the cutting opening cover layer, the impacting nozzle layer, the impacting plate layer, the particular matter collecting layer, the gas POPs (Persistent Organic Pollutants) collecting layer and the gas discharging layer are sequentially sealed and connected in series; the impacting nozzle layer comprises impacting nozzles and an impacting nozzle plate; the impacting nozzles are arrayed at an equal interval and are vertically inserted into the impacting nozzle plate to form an annular ring; the impacting nozzles are internally provided with reversed conical through holes; and the impacting plate layer is provided with an impacting plate and the impacting plate is an annular groove. With the adoption of the PM2.5 single-grade atmosphere sampling cutter disclosed by the invention, the characteristic that a previous air sampling device has middle and small flow is broken through; and a flow design standard of 300 L/min can meet the POPs sampling requirements so that the cutting grain diameter of the cutter is accurate and the target of accurately layering the target particular matters under the cutting of an inertia impacting force can be realized.

The invention discloses an electrostatic field-based air sampler and a sampling method thereof. The air sampler mainly comprises a hemispherical electrode (1), a round electrode (2) and a sampling tank (4). Microorganisms with electric charges in air in a sampling space are concentratedly deposited in a liquid medium in a relatively small area in the center of a hemisphere along the direction of an electrostatic field under the action of the electrostatic field, and an air sample is dynamically conveyed under the drive of a micro peristaltic pump simultaneously. The defects that efficiency is low, an automatic sample conveying system is not provided and the like in the prior art are overcome, and the air sample is sampled to the trace liquid medium through the electrostatic field by a novel electrostatic field sampling method, and is dynamically conveyed to a biological/chemical sensor through an inlet and outlet. The air sample is highly concentrated, and the air sampler can be integrated with the sensor and has a good application prospect in the fields of environment monitoring and the like.

The invention discloses a high altitude gradient type air sampler based on an unmanned aerial vehicle; the air sampler includes a rotor type unmanned aerial vehicle; the bottom of the rotor type unmanned aerial vehicle is provided with a sampling platform; the left end of the sampling platform is provided with a first micro motor; an output shaft of the first micro motor is fixedly connected witha central shaft, the outer periphery of the central shaft is provided with an inner cylinder and an outer cylinder which are concentric; a space between the inner cylinder and the outer cylinder is separated into fan-shaped spaces with equal size by partition boards, and each fan-shaped space is internally provided with an adsorption device; the right end of the sampling platform is also providedwith an expansion type sampling device. The problem of atmospheric sampling at different heights and different periods of time at the same height is solved.

The invention relates to the technical field of microbial air sampling, in particular to a miniature personal microbial air sampler. The invention is characterized in that the sampler mainly comprises a gas circuit part (1), a power source part (2), a signal processing part (3) and a mechanical part (4), wherein a sampling head of the gas circuit part adopts a microporous membrane filter, and a membrane is arranged in the microporous membrane filter. The invention mainly solves the problem that the current samplers are large in volume and has heavy weight arising from only using an alternating current (AC) power to carry out power supply, therefore, the current samplers are inconvenient to carry by workers, and the sampling sites and environments thereof are greatly restricted. The invention has the advantages of easy carrying, small volume, light weight, high sampling efficiency, and accurate and reliable monitoring results.