Diffusion Tubes
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You can buy this tool from Different local labs. The anticipated price range is Less than $20.
| Description |
Passive NO2 Palmer diffusion tubes - these are "small plastic tubes containing a chemical reagent to absorb the pollutant to be measured directly from the air. In the case of Palmes-type nitrogen dioxide diffusion tubes, the absorbent used is triethanolamine (TEA). Stainless-steel mesh grids at the closed end of the tube are coated with a water-based or acetone-based solution of this absorbent. Specific pollutants This tool is recommended for lending libraries. |
|---|---|
| Used by these projects | Community air quality monitoring |
| Ideal Age Group |
Elementary school (6 - 10 years), Middle school (11 - 13 years), High school (14 - 17 years), College, Graduate students, Adults, Families, Seniors
(All you need to do is to have a ladder to install this on a lamppost or a balcony) |
| Training | Learning materials are available online. |
| Use considerations | Assembly is required. Callibration is required. This tool relies on lab processing. This tool require consumable materials (e.g. batteries, light bulbs, etc.). |
| Size & weight |
Small: This tool would fit in a 6 inch cube. Less than 13oz (a full soda can weighs a little less than 13oz) |
| Expected lifetime | Should last a few weeks |
| Topics | Ecology & Environment, Geography |
| Activities | At home, At school |
| Tool updated | Feb. 12, 2017, 1:26 p.m. |
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