Abstract: A thin film forming apparatus including: a first chamber configured to generate a mist of a dispersion liquid, and including an outlet; a second chamber configured to receive the generated mist from the first chamber and collect particles of the generated mist having a size greater than a predetermined value, and including an inlet provided on a top of the second chamber and connected to the outlet of the first chamber, and an outlet provided on the top of the second chamber and configured to transfer, as homogenized mist, particles of the generated mist having a size less than or equal to the predetermined value due to the effect of gravity on the particles of the mist; and a third chamber configured to receive the homogenized mist from the second chamber, and including an inlet connected to the outlet of the second chamber.

Abstract: In the case of an impactor (1) with an impact plate (7) and a classifying nozzle (2) directed at this impact plate (7), in the case of which the impact plate (7) is formed as an electronically readable resonantly oscillating, mass-sensitive element (7, 33), it is proposed to move the oscillating crystal (7, 33) held in an impact plate holder (8) in relation to the static classifying nozzle (2) by a motor (12) during the operation of the impactor (1).

Abstract: A modular pre-filtration apparatus may be beneficial to extend the life of a filter. The apparatus may include an impactor that can collect a first set of particles in the air, and a scroll filter that can collect a second set of particles in the air. A filter may follow the pre-filtration apparatus, thus causing the life of the filter to be increased.

Abstract: A new installment classifies particles by their aerodynamic size This installment produces a truly monodisperse aerosol, and can produce very narrow distributions over a wide range of sizes Particles suspended in a fluid are classified by supplying particles into suspension in a carrier flow of a fluid and providing an acceleration to the flow at an angle to the velocity of the flow to cause the particles to follow trajectories determined by the acceleration and drag on the particles caused by the fluid The particles are then classified according to their trajectories The installment has a flow channel and a source of particles to supply particles into suspension in a carrier fluid in the flow channel A drive is connected to the flow channel at an angle to the flow of fluid through the carrier flow channel, and a classification system classifies the suspended particles according to their trajectories.

Abstract: A skimmer device for concentrating an aerosol from a flowing gas stream, having an inlet with inlet aperture and inlet raceway, an outlet with virtual impact void and collector channel, and bulk flow divertors symmetrically disposed on either side of the long axis of flow, further characterized in that the downstream walls of the bulk flow divertors are concavedly curved and reverse the direction of bulk flow. In section, the four channels or passages of the “skimmer” thus form a “crossed tee” with concavedly contoured lateral arms curving back around. The lateral flow channels are for diverting the bulk flow into exhaust chimney spaces, and the chimney spaces are positioned proximate to the inlet element and anterior to the collection channel. In operation, the bulk flow streamlines are thereby folded more than 90 degrees away from the long axis of flow on the laterally disposed concave walls of the bulk flow channels.

Abstract: A skimmer device for concentrating an aerosol from a flowing gas stream, having an inlet with inlet aperture and inlet raceway, an outlet with virtual impact void and collector channel, and bulk flow divertors symmetrically disposed on either side of the long axis of flow, further characterized in that the downstream walls of the bulk flow divertors are concavedly curved and reverse the direction of bulk flow. In section, the four channels or passages of the “skimmer” thus form a “crossed tee” with concavedly contoured lateral arms curving back around. The lateral flow channels are for diverting the bulk flow into exhaust chimney spaces, and the chimney spaces are positioned proximate to the inlet element and anterior to the collection channel. In operation, the bulk flow streamlines are thereby folded more than 90 degrees away from the long axis of flow on the laterally disposed concave walls of the bulk flow channels.

Abstract: A method for determining fractions of coolants emitted into the atmosphere in processes using coolants, in particular in the metal processing industry. Here, samples of the atmosphere polluted with fractions of coolants in droplet and vapor form are fed to an evaporator. In the evaporator, the fractions of coolants in droplet form contained in the samples are evaporated and subsequently the vapor resulting from the fractions of coolants in droplet form is fed to an analysis unit, in particular a flame ionization detector, together with the fractions of coolants in vapor form contained in the samples. In the analysis unit the concentrations of the coolants contained in the samples are ascertained.

Abstract: A particle sampling device is disclosed for separating and collecting particles of at least first and second mass/size ranges from an ambient fluid (e.g. gaseous) medium in which they are present, particles of the first range being of generally larger size/mass than particles of the second range. The separator is especially designed for use in an air sampling device which is designed for rapid detection of micro-organisms such as bacteria, viruses, pathogens and the like, and is designed to be portable so that it can be readily and rapidly deployed in both civilian and military environments and can be used indoors and outdoors; it can also be designed for personal use.

Abstract: Provided is a method and apparatus which enable only pollen existing in the atmosphere to be automatically quantified. According to the method and apparatus, particles other than those substantially smaller than pollen grains, contained in a given amount of atmosphere, are separated; the separated particles are caused to flow through a flow cell in such a state that self-fluorescence from each of the particles can be measured; self-fluorescence from each of the particles passing through the flow cell is measured; and the number of particles is counted based on a measured value.