[Stoves] Bottom of the line smoke detector

[Crispin Pemberton-Pigott]

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

 

 

 

 

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