Asked 11th May, 2013

Can you help me understand why Palmes Diffusion Tubes are not widely used in USA?

Palmes diffusion tubes are a useful tool for assessing NO2 pollution in both urban and remote regions. They are widely used in Europe and Asia. It seems as if there are very few researchers using them in the US, most studies rely on sophisticated electronic instruments. I could not find a supplier for them in this country and had to make them myself.

All Answers (1)

12th May, 2013
Lance A Wallace
Lance Wallace Consultant Santa Rosa California USA
Palmes tubes are excellent cheap devices for collecting NO2 passively. However, Yanagisawa badges were developed in the 1980s that were about an order of magnitude more sensitive. At some later time, Ogawa badges (perhaps related to the Yanagisawa badge, perhaps not) became the most widely used passive devices for measuring NO2 integrated over hours or days.

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