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Hamamatsu Corp. - Earth Innovations LB 2/24

Tiny Bubble Is Key to Optical Measurement

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Michael D. Wheeler

Engineers at water treatment plants and other facilities that monitor biological and chemical pollutants in water are turning to optical techniques such as spectroscopy. These techniques are not without their drawbacks. Transparent cells holding the sample can become fouled by biological or chemical compounds found in the water, altering how much light is detected after scattering or absorption. This affects the reliability of optical measurements. To keep these windows clean, engineers have developed cleaning mechanisms including brushes, rigid blades and high-voltage plasma discharges....Read full article

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    Published: June 1998
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