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2. Air pollution measurement - Wikipedia

   en.wikipedia.org/wiki/Air_pollution_measurement

   Unlike low-cost monitors, which are carried from place to place, static monitors continuously sample and measure the air quality in a particular, urban location. Public places such as busy railroad stations sometimes have active air quality monitors permanently fixed alongside platforms to measure levels of nitrogen dioxide and other pollutants ...

3. Air Quality Egg - Wikipedia

   en.wikipedia.org/wiki/Air_Quality_Egg

   The Air Quality Egg (AQE) is an Internet of Things platform and hobbyist device for crowdsourced citizen monitoring of airborne pollutants. The device won widespread recognition when it was named one of the best projects on Kickstarter in 2012, [1] and has been featured in a variety of media outlets. [2]

4. I thought the Sensibo Elements air-quality monitor was ... - AOL

   www.aol.com/lifestyle/thought-sensibo-elements...

   The Elements is a smart-home device that measures not only overall air quality, but also things like total volatile organic compounds (TVOCs), particulate matter (i.e., dust), carbon dioxide ...

5. Diffusion tube - Wikipedia

   en.wikipedia.org/wiki/Diffusion_tube

   A diffusion tube is a scientific device that passively samples the concentration of one or more gases in the air, commonly used to monitor average air pollution levels over a period ranging from days to about a month. [1]

6. Environmental monitoring - Wikipedia

   en.wikipedia.org/wiki/Environmental_monitoring

   Passive or "diffusive" air sampling depends on meteorological conditions such as wind to diffuse air pollutants to a sorbent medium. Passive samplers, such as diffusion tubes, have the advantage of typically being small, quiet, and easy to deploy, and they are particularly useful in air quality studies that determine key areas for future continuous monitoring.

7. Particulate matter sampler - Wikipedia

   en.wikipedia.org/wiki/Particulate_matter_sampler

   The tapered element oscillating microbalance (TEOM) particulate sampler operates by drawing air through a filter attached at the tip of a glass tube. An electrical circuit places the tube into oscillation , and the resonant frequency of the tube is proportional to the square root of the mass on the filter.