Profile: Pixe International, Inc. is a manufacturer and seller of precision air particulate samplers. Our products include PIXE streakers™ and PIXE Cascade Impactors™. Our PIXE streaker™ is a time-sequenced air-particulate sampler designed to produce one or two aerosol size fractions especially suited for ion beam and light absorption analysis. The sampler is versatile and discrete sampling times from 1 second to 99 hours are switch selectable. Total sampling times can range from minutes to months or longer. The spacing between samples is switch selectable in 0.25 degrees per step with a total sample range of 315 degrees. Our PIXE cascade impactor™ is an air particulate sampler that uses inertial impaction to collect aerodynamically fractionated particulate samples. The particulate matter can be separated in up to ten diameter ranges: >16, 16-8, 8-4, 4-2, 2-1, 1.0-0.5, 0.5-0.25, 0.25-0.12, 0.12-0.06, and <0.06 m. These ten intervals provide adequate resolution to characterize aerosols in a region of great environmental interest. These impactors are molded of electrically-conductive high-quality plastic with o-ring seals, and are designed for modest pumping requirements of 1.0 liter/minute.