Air quality monitor. This device is being used to measure the amount of pollutants in the air. This is the ETL 3000 model. Above the monitor is an ane

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Air quality monitor. This device is being used to measure the amount of pollutants in the air. This is the ETL 3000 model. Above the monitor is an anemometer (black, upper right), a device used to measure wind speed and direction.

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Size: 3433px × 5150px
Photo credit: © STEVE PERCIVAL/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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