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Paul</div>
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Thanks for raising the profile and maintaining enthusiasm. Small and not very accurate smoke detectors are better than nothing at all. </div>
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<span style="font-size: initial; text-align: initial; line-height: initial;">I will include a description of how to 'make a plan' in the discussion of PM methods. </span></div>
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<span style="font-size: initial; text-align: initial; line-height: initial;">It has worried me that so much of the development work is done with no measuring at all. We get a lot of stoves for testing that can immediately be improved with a single test on the
bench showing real time measurements. </span></div>
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<span style="font-size: initial; text-align: initial; line-height: initial;">I just finished a training session in Yogyakarta optimising several aspects of a very simple stove (looks like a bucket) using only the water heating rate and a calculator. We were
optimising the excess air level using the pot-stove gap as a control. The improved version of the stove is about 30% efficient compared with a lab tested 16% for the original. It wholesales for about 30 cents (!) and looks exactly like the original at a glance. </span></div>
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<span style="font-size: initial; text-align: initial; line-height: initial;">I have one lab test in hand and will pass it along if it is interesting. The point is if you are shown what to look for, you can do a lot with a little. </span></div>
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<span style="font-size: initial; text-align: initial; line-height: initial;">Can anyone produce a working, calibrated oxygen sensor from car parts? They are everywhere and good enough to inform the engine management computer. </span></div>
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<span style="font-size: initial; text-align: initial; line-height: initial;">Regards </span></div>
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<span style="font-size: initial; text-align: initial; line-height: initial;">Crispin in sunny, humid Jakarta</span></div>
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<div style="background-color:#FFFFFF">Stovers,<br>
<br>
WONDERFUL!!! Now this Listserv is really working together!! So summary of comments and thoughts thus far:<br>
<br>
1. MOST of us were almost unaware of the existence of Speck, and we find out (thanks Christina) that there are many such types of units.<br>
<br>
2. But being inexpensive, they have issues of quality of the data. Evidently not of sufficient quality for the HEALTH STUDIES requirements of Kirk Smith and his crew.<br>
<br>
3. But for those of us in the "trenches" trying to understand how to improve the stoves, these small detectors of PM could be of great assistance. If only to be able to detect whether the emissions are improving or worsening would be useful for a stove designer
to make comparisons between one stove with two different variations.<br>
<br>
4. These smaller PM measurement devices have not yet entered into the activities of Aprovecho (as developer of high precision instruments) and therefore have not been part of Aprovecho activities for Stove Camps where the inexpensive instruments might be of
great interest. <br>
<br>
5. Will these PM sensors be part of Stove Camps? Or when? I do not have any such sensors, and I am not intending to attend the Aprovecho Stove Camp in July (27 to 31, I believe). Dean and crew or some attendee might arrange to have the PM sensors by
then.<br>
<br>
But there is another Stove Camp early next month (9 - 10 July) in Ontario, Canada, headed by Crispin PP and Julien Winter and hosting assistance by Alex English. The focus will be on the RELATIVELY LOW COST emissions testing equipment (and procedures) that
Crispin knows so well. If you are not familiar with such equipment or want further information and hands-on experience, consider attending. Information about this Stove Camp about Testing is available from Julien, who I ask to re-post to the Stoves Listserv
the contact information and details / agenda (with a new Subject line). So, perhaps further discussion about the inexpensive PM measurement devices will be included at that event.<br>
<br>
Paul<br>
<pre class="x_moz-signature" cols="72">Doc / Dr TLUD / Prof. Paul S. Anderson, PhD
Email: <a class="x_moz-txt-link-abbreviated" href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a>
Skype: paultlud Phone: +1-309-452-7072
Website: <a class="x_moz-txt-link-abbreviated" href="http://www.drtlud.com">www.drtlud.com</a></pre>
<div class="x_moz-cite-prefix">On 6/10/2015 6:09 PM, Christina Espinosa wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">I asked Kirk Smith if he had used this one before and here is his response regarding these type of PM devices for the home from tests they have run:<br>
<br>
<span style="color:rgb(0,0,255)">"There a number of PM devices on the market now designed for general consumers -- at least a dozen in China alone. plus some here. We have evaluated several and are doing another batch here soon at our lab in Richmond. So
far, none has the combination we want of <br>
<br>
-- precise and stable enough readings<br>
--small and light enough for personal monitoring<br>
--ease in zeroing and calibrating<br>
--high enough upper limit -- they typically stop at 1 mg/me or lower<br>
--ease in cleaning -- necessary for our environments or even in dirty Asian cities<br>
--reasonable battery life<br>
--easy datalogging, downloading, etc<br>
<br>
Our UCB-PATs+ does meet these criteria and is now undergoing field trials. (We are also flying it on our aerial particle monitor (drone) in India.) Would not expect it to be commercially available (from BA) until early next year, however."</span><br>
<br>
<br>
<div class="x_gmail_extra"><br>
<div class="x_gmail_quote">On Wed, Jun 10, 2015 at 4:22 PM, Roberto Poehlmann <span dir="ltr">
<<a href="mailto:roberto.poehlmann@gmail.com" target="_blank">roberto.poehlmann@gmail.com</a>></span> wrote:<br>
<blockquote class="x_gmail_quote" style="margin:0 0 0
.8ex; border-left:1px #ccc solid; padding-left:1ex">
<div dir="ltr">
<div>Paul,</div>
<div><br>
</div>
<div>i found this links about specksensor, with experiments results:</div>
<div><br>
</div>
<div><a href="http://publiclab.org/notes/chrisbartley/04-15-2014/speck-particle-monitor" target="_blank">http://publiclab.org/notes/chrisbartley/04-15-2014/speck-particle-monitor</a><br>
</div>
<div><br>
</div>
<div>This is another monitor of PM:<br>
</div>
<div><a href="http://www.dylosproducts.com/ornodcairqum.html" target="_blank">http://www.dylosproducts.com/ornodcairqum.html</a><br>
</div>
<div><br>
</div>
<div>..and another:</div>
<div><a href="http://aircasting.org/" target="_blank">http://aircasting.org/</a><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>Arduino:</div>
<div><br>
</div>
<div>In the world of Arduino, you can DIY your own PM device, like this (Dustduino):</div>
<div><a href="http://publiclab.org/notes/Schroyer/11-23-2013/measure-coarse-and-fine-air-particulates-with-a-dustduino" target="_blank">http://publiclab.org/notes/Schroyer/11-23-2013/measure-coarse-and-fine-air-particulates-with-a-dustduino</a><br>
</div>
<div><br>
</div>
<div>It uses the sensor Shinyei PPD-42 Dust Sensor (<a href="http://www.seeedstudio.com/depot/grove-dust-sensor-p-1050.html" target="_blank">http://www.seeedstudio.com/depot/grove-dust-sensor-p-1050.html</a>)</div>
<div><br>
</div>
<div>This is a experiment to compare this Japan sensor with a similar Korean Sensor,
<a href="http://aqicn.org/sensor/shinyei/" target="_blank">http://aqicn.org/sensor/shinyei/</a></div>
<div><br>
</div>
<div>It says that "There are many affordable and low-cost air particule sensor. The most famous one is definitely the Japanese Shinyei sensor, with a cost of around 75 CNY (12 USD)"</div>
<div><br>
</div>
<div><br>
</div>
<div>This is another DIY monitor with arduino:<br>
</div>
<div><a href="http://www.instructables.com/id/Make-one-PM25-monitor-with-Arduino-UNO/" target="_blank">http://www.instructables.com/id/Make-one-PM25-monitor-with-Arduino-UNO/</a><br>
</div>
<div><br>
</div>
<div>It uses the sensor SDS011 (link <a href="http://inovafitness.com/product-35.html" target="_blank">
http://inovafitness.com/product-35.html</a>).</div>
<div><br>
</div>
<div><br>
</div>
<div>Finally, i found this document, that describe various sensors and describe how it works.</div>
<div><a href="http://www.teco.edu/%7Ebudde/publications/inss2012_budde.pdf" target="_blank">http://www.teco.edu/~budde/publications/inss2012_budde.pdf</a><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>I have now two Arduinos, and i will make (some day) my own datalogger (temp, PM, CO, oxygen, etc.). The sensors for Arduino's are not to expensive, and in Internet exists a lot of examples of this type of devices.</div>
<div><br>
</div>
<div>This is, for example, a dalalogger made with Arduino:</div>
<div><br>
</div>
<div><a href="http://www.instructables.com/id/Arduino-Temp-Logger/" target="_blank">http://www.instructables.com/id/Arduino-Temp-Logger/</a><br>
</div>
<div><a href="https://blog.adafruit.com/2010/09/07/a-thermocouple-datalogger-based-on-the-arduino-platform/" target="_blank">https://blog.adafruit.com/2010/09/07/a-thermocouple-datalogger-based-on-the-arduino-platform/</a><br>
</div>
<div><br>
</div>
<div>
<div>Cheers<span class="x_HOEnZb"><font color="#888888"><br>
Roberto</font></span></div>
</div>
</div>
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<br clear="all">
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-- <br>
<div class="x_gmail_signature">Christina Espinosa<br>
University of the Pacific '10<br>
School of International Studies<br>
<a href="mailto:c_espinosa1@u.pacific.edu" target="_blank">c_espinosa1@u.pacific.edu</a><br>
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