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How can aerosols be detected?

Updated: 8/9/2023
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13y ago

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Most aerosols (being a finely dispersed particle within a gas) are detected by an optical instrument of some kind. When the aerosol is passed through this type of measurement device, a light beam is broken or reflected by the particle and this registers a count. Often the machines are capable of determining the concentration of particles (number per volume of gas) and size the actual particle. Different machines work slightly differently, some condense (add a liquid) the particle to make it larger before detection. The majority of particle counters or aerosol spectrophotometer typical can measure particles bigger then 0.1µm (1/10000th mm), though more typically this value is 0.3µm. Cleans rooms use this technology regularly to check the aerosol content of the air, whilst in the vacuum cleaner industry we use these instruments to determine the capability of the filters and cyclones.

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Q: How can aerosols be detected?
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