Abstract: A device for measuring superfine particle masses including a quartz oscillator and an exposure system having at least two measuring chambers. Each of the at least two measuring chambers has a same geometry, a deposition surface for particles, and an aerosol feed directed at the respective disposition surface configured to feed an aerosol onto the respective deposition surface. At least one of the respective deposition surfaces is disposed on the quartz oscillator.

Abstract: A device for measuring superfine particle masses including a quartz oscillator and an exposure system having at least two measuring chambers. Each of the at least two measuring chambers has a same geometry, a deposition surface for particles, and an aerosol feed directed at the respective disposition surface configured to feed an aerosol onto the respective deposition surface. At least one of the respective deposition surfaces is disposed on the quartz oscillator.

Abstract: A wet electrostatic ionization stage in an electrostatic separation device for purifying a flowing aerosal including finely dispersed particles entrained in a gas. The wet electrostatic ionization stage includes a plate disposed across a cross section of a flow channel and connected to a ground potential or reference counterpotential. The plate includes substantially identical openings through which the gas flows. The wet electrostatic ionization stage also includes a high-voltage grid disposed across the cross section of the flow channel either upstream or downstream from the plate and electrically isolated from a wall of the flow channel. The high voltage grid is coupled to a high voltage potential via a bushing disposed in the wall of the flow channel. For each opening in the plate, a rod-shaped high-voltage electrode coupled at one end to the high-voltage grid has a free end projecting centrically into the one opening.

Abstract: A wet electrostatic ionization stage in an electrostatic separation device for purifying a flowing aerosal including finely dispersed particles entrained in a gas. The wet electrostatic ionization stage includes a plate disposed across a cross section of a flow channel and connected to a ground potential or reference counterpotential. The plate includes substantially identical openings through which the gas flows. The wet electrostatic ionization stage also includes a high-voltage grid disposed across the cross section of the flow channel either upstream or downstream from the plate and electrically isolated from a wall of the flow channel. The high voltage grid is coupled to a high voltage potential via a bushing disposed in the wall of the flow channel. For each opening in the plate, a rod-shaped high-voltage electrode coupled at one end to the high-voltage grid has a free end projecting centrically into the one opening.