Dear Sarbagya
The device is only accurate (OK, reasonably good guess) for indoor air because unless you know the dilution of the gas sample, you don't really know how much PM was generated. If you wanted to measure the PM from a stove by pulling a sample (10 pumps I think on the handle) from the gap between a stove body and pot you can get some idea of the difference between two similar stoves, however as you are not measuring the excess air so you don't know how diluted it is. What it is really good for is giving an indication of indoor air quality at a very low cost. I have used them in the past to do that. It was really clear, for example, that the PM in indoor air in kitchens in the eastern lowveld Swaziland varied a great deal, in two identifiable clusters. There were low PM ones and really high PM ones. Looking at the data it became clear that all the high PM kitchens were in homesteads occupied by Mozambiquean immigrants who build a very different structures from ethnic Swazis. As always, when you have nothing, half a loaf is better than no bread. Regards Crispin Hi Crispin, Would this Bacharach Smoke Detector work for measuring the PM emissions from a stove similar to using a PM gravimetric system ? Not possible to obtain real time data from it, I assume. Cheers Sarbagya On 27/05/2013, at 10:13 PM, Crispin Pemberton-Pigott wrote: Dear Friends If you want to have a very simple PM detector the Bacharach Smoke Detector is one that may suit your budget. It uses a vacuum cylinder with hand pump and you compare the darkness of the spots on a filter paper with a chart. It turns out the blackness of the spot is a pretty good indicator of the clack carbon content. This is being studied by Berkeley, actually, using photos of filters. <http://www.uno.co.jp/seihin_info/catalogue/11_environmental/0479.pdf> http://www.uno.co.jp/seihin_info/catalogue/11_environmental/0479.pdf That is the place. Look down on the left side. Regards Crispin _______________________________________________ Stoves mailing list to Send a Message to the list, use the email address <mailto:[email protected]> [email protected] to UNSUBSCRIBE or Change your List Settings use the web page <http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylist s.org> http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists .org for more Biomass Cooking Stoves, News and Information see our web site: <http://stoves.bioenergylists.org/> http://stoves.bioenergylists.org/
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