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NkówáAir pollution sensor at Birmingham New Street train station.jpg
English: Two automated air pollution (carbon dioxide/nitrogen dioxide) sensors on the platforms at Birmingham New Street train station in the UK. The cage contains a carbon dioxide sensor (left) and nitrogen dioxide sensor (right), side by side. The sensors are made by Kimessa, use infrared (for CO2) and electrochemical technology (for NO2), and produce digital output.
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Please note that we "relaxed" the license on this image in September 2022 following a request that to upload it to Wikimedia Commons, so it's now licensed as Attribution-ShareAlike 2.0 Generic (CC BY-SA 2.0).**
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