The invention relates to a filtration assembly (5) comprising an annular support (12) which comprises an annular step (13) having an apex on which a filter membrane (11) rests, and a cover (20) covering the annular support in order to hold a periphery of the membrane between the cover and the annular support. The cover comprises a ring (21) which fits around the step to trap the periphery of the membrane between the ring and the annular support, the ring being extended by a skirt (22) which extends as a projection from the ring to cover an external peripheral wall of the annular support and to exhibit an end face (23) which extends in continuity with a bearing face (24) of the annular support. The invention also relates to a removable cassette for an apparatus for sampling nanoparticles comprising such a filtration assembly.

To provide a method with which it is possible to ascertain a gas concentration in a furnace rapidly, and to charge an amount of fuel and/or oxygen corresponding to the state within the furnace, and with which it is possible to reduce the device maintenance load. In order to solve the abovementioned problem, this method for analyzing components contained in flue exhaust gas of a furnace includes: a sampling step of collecting a portion of the flue exhaust gas from a flue; a dust removal step of using a centrifugal dust collecting device to separate out dust in the flue exhaust gas collected in the sampling step, to yield an analysis gas; a measuring step of measuring components in the analysis gas to obtain the concentration of carbon monoxide in the analysis gas; and an analysis gas discharging step of causing the analysis gas to be sucked by an ejector.

A combustion analyzer system includes an analyzer unit, a primary analysis probe and one or more remote probes. The analyzer unit includes a condensation removal unit and two or more electrochemical sensors to detect at least oxygen and carbon monoxide. The analyzer unit or the primary analysis probe include a means for condensing and eliminating liquid in the combustion gas to be analyzed.

Provided is a continuous isokinetic sampling device of a stack gas having a suction nozzle to which a cross-sectional area control device is attached, and a continuous automatic measurement system of fine dusts in the stack gas combined with the same, the device and system being configured to continuously separate and automatically measure the suspended particles into PM10 (Particulate Matter Less than 10 m) and PM2.5 (Particulate Matter Less than 2.5 m) by introducing a suction gas into a particle size separation device (cascade Impactor) at a constant flow rate of 16.67 l/min, simultaneously with removing an measurement error caused due to inertia force of the suspended particles by automatically adjusting the cross-sectional area of the suction nozzle to suck the sample at the same flow rate as that of the stack gas in the stationary source emissions.

The invention provides a device for extracting a vaporizable analyte from a sample gas containing the analyte and unwanted aerosol particles; the device comprising a vapour extraction chamber (2), first (3) and second (4) inlets, and first (5) and second (6) outlets; the vapour extraction chamber (2) being provided with or being linked to a heat source for heating the vapour extraction chamber (2) to a desired temperature to facilitate vaporization of analyte present in the sample gas; the first (3) and second (4) inlets being linked to an upstream end of the vapour extraction chamber (2) and the first (5) and second (6) outlets being linked to a downstream end of the extraction chamber (2); the first inlet (3) allowing a sample of gas containing the analyte and unwanted aerosol particles to be introduced into the vapour extraction chamber (2); the second inlet (4) being connected or connectable to a clean gas supply that does not contain the analyte or unwanted aerosol particles; the device being configured such that, in use, a sample gas flow (7) is established through the vapour extraction chamber between the first inlet (3) and the first outlet (5), and a clean gas flow (8) is established through the vapour extraction chamber between the second inlet (4) and the second outlet (6); whereby analyte in vapour form present in the sample gas flow (7) diffuses into the clean gas flow (8), but the clean gas flow (8) reaching the second outlet is substantially free of the said unwanted aerosol particles; the first outlet (5) serving as a waste outlet for the sample gas flow, and the second outlet (6) being connected or connectable to an instrument for analysing analyte that has diffused into the clean gas flow.

A sampler apparatus is disclosed. The sampler apparatus comprises an impactor assembly comprising a nozzle plate, an impaction plate, and a filter unit. The nozzle plate comprises a plurality of nozzles for channelling an air stream through the sampler apparatus. The impaction plate is adapted to collect particulate matter having size equal to or greater than a threshold size. The filter unit is adapted to collect particulate matter having size less than or equal to the threshold size. The sampler apparatus further comprises a control assembly coupled with the impactor assembly. The control assembly comprises one or more flow control devices to maintain a predetermined air-flow rate of the air stream within the sampler apparatus.

The present invention relates to an apparatus (1) and process for measuring characteristics of a particle flow. The measuring is done with two different cut-off diameters of a particle trap (13) of which one cut-off diameter is adjusted based on the measured particle characteristics.

The present application discloses a gas sampling device, in particular, a fractionation gas sampling device comprising a heat exchanger, and the heat exchanger comprises one or more groups of tubes, wherein, a guide plate is disposed in the tubes. The fractionation gas sampling device further comprises a coke cleaning mechanism having a decoking head, and the decoking head has a circular arc guide. The fractionation gas sampling device has a large heat exchange area, a high heat exchange efficiency, and overcomes the surface tension between liquids so as to avoid generating liquid columns; moreover, by combining with the coke cleaning mechanism, the fractionation gas sampling device not only achieves excellent technical effects relevant to decoking, but also effectively prevents from a blocking phenomenon of the decoking head, thereby realizing an automatic cleaning.

A mold sensor is configured with an enclosed chamber in which a nutrient-treated substrate is positioned. The mold sensor includes a sensing system that is configured to measure properties of pressure waves within the enclosed chamber. A controller operates the sensing system and is programmed to detect a presence of mold growing in the chamber based on the characteristics of the pressure wave response within the chamber.

A mold sensor include a housing that defines an enclosed chamber in which a nutrient-treated substrate is positioned. The mold sensor includes a substrate advancement mechanism that is configured to selectively move the substrate to expose a surface of the substrate within the chamber. The mold sensor includes a sensor configured to detect mold growth on the substrate within the chamber.