in search of a low-cost air quality sensor

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particlenumber [09-03-2018 12:26]
admin [Sensors]
particlenumber [09-03-2018 12:34] (current)
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 ====== Particle Number Concentration ====== ====== Particle Number Concentration ======
 +Most low-cost particle counters use the light scattering principle:
 +Particles in the air flow can scatter the laser or LED light. This is detected by a photodiode which looks at the light beam under a rectangular angle. The scattered light is thus transformed into electrical signals which are amplified and processed. The number and diameter of the particles can be obtained by analysis because the signal waveform has certain relations with the particles diameter.
 ==== Sensors ==== ==== Sensors ====
particlenumber.txt ยท Last modified: 09-03-2018 12:34 by admin