Saw this on a lamp post. Could it be a pollution collector?

by aje0200

14 comments
  1. 5g dispenser mate, make sure to smoke a cigarette to suffocate all the toxins in your stomach

  2. It is a little vial who was celebrating his stag do last night

  3. I used to help put these up to get out of the office for the morning. It is a diffusion tube for air quality monitoring. There are probably a few others around where you saw this one.

  4. You won’t collect much pollution with that, a bigger one would help more surely

  5. It’s an ‘Anti-Satan Bulb’

    They work surprisingly well!

  6. It’s to see whether rain is falling upwards or not, like it does in Australia.

  7. Diffusion tube used for monitoring air quality, specifically NO2. One end is open, the other end have a small metal gauge treated with a chemical solution. The are usually replaced each month and are sent to a lab where they are analyzed.

    Every local authority have a duty to report air quality as part of the environmental act. Addition surveys might be undertaken if an air quality assessment is required for planning permission.

    The tubes are used for both reporting baseline air quality concentrations, and for verifying air quality dispersion modelling software used by air quality consultants. The software models the concentrations of NOx and compared that to the monitored concentration, a factor is applied to the final results for a robust assessment.

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