Technology
Particle Counter Technology Developments and Improvements
By Thomas Pietrykowski & John Mitchell
Particles Monitoring Measurements Analytics
Abstract
For approximately 4 decades, liquid optical particle counters (OPC) have been built around six main components: a single wavelength laser, beam shaping optics, a measurement region, collection optics, a photo-detector, and an analog-to-digital converter. Over the years, advancements in geometry, optics, and detector design have pushed the limits of detection down to 50 nanometers (nm). However, current instrumentation can monitor only a small percentage of real world particles at this size. A new digital particle measurement technologya uses a high density, two-dimensional array of high efficiency detector elements. This technology has detection limits down to 40 nm, and could someday reach 30 nm. There are many ind
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