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<p>Hi Pete,</p>
<p>We use arduino microcontrollers for our gasifiers.</p>
<p>You get low cost pressure transducers from Freescale semiconductors. They synch pretty well with the arduino hardware ( matching supply voltage and output range). They cost about $10 each and are very reliable and reasonably accurate if you take care of the electronics. You can easily get them on any online electronics store like digikey, mouser, etc.</p>
<p>I believe Allpowerlabs also use similar transducers (atleast look the same)</p>
<p><br />Regards</p>
<p> </p>
<p><br />Shivanand Ramachandran</p>
<p><span style="color: #000000;"> Infinite Energy Private Limited<br /> First Floor, Baba House<br /> 149-A, Kilokri<br /> New Delhi - 110014<br /> Phone 011-65191937, 65273819<br /> Fax : 011 - 26348472</span></p>
<p> </p>
<p><br />On 26-04-2012, Pete & Sheri wrote:</p>
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<p class="MsoNormal"><span style="font-size: 11.0pt; color: #1f497d;">Hello Stephen.<!-- o ignored --></span></p>
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<p class="MsoNormal"><span style="font-size: 11.0pt; color: #1f497d;"> The link you supplied to Dwyer was for a Switch, not a sensor. I didn’t make myself clear.<!-- o ignored --></span></p>
<p class="MsoNormal"><span style="font-size: 11.0pt; color: #1f497d;">I am looking for a sensor in the range of minus 20 inches WC to plus 20 inches WC that will give me an electrical output in proportion to the pressure being sensed, so I can graph the quantity and use its magnitude to control the system.<!-- o ignored --></span></p>
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<p class="MsoNormal"><span style="font-size: 11.0pt; color: #1f497d;">Sorry for my poor quality communication,<!-- o ignored --></span></p>
<p class="MsoNormal"><span style="font-size: 11.0pt; color: #1f497d;">Pete Stanaitis<!-- o ignored --></span></p>
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<p class="MsoNormal"><strong><span style="font-size: 10.0pt;">From:</span></strong><span style="font-size: 10.0pt;"> gasification-bounces@lists.bioenergylists.org [mailto:gasification-bounces@lists.bioenergylists.org] <strong>On Behalf Of </strong>sabbadess@aol.com<br /><strong>Sent:</strong> Wednesday, April 25, 2012 2:18 PM<br /><strong>To:</strong> gasification@lists.bioenergylists.org<br /><strong>Subject:</strong> Re: [Gasification] Process controllers for gasifier/engine control and datalogging, Are there any Arduino users out there?<!-- o ignored --></span></p>
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<p class="MsoNormal"><span style="font-size: 10.0pt; color: black;">Pete,<!-- o ignored --></span></p>
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<p class="MsoNormal"><span style="font-size: 10.0pt; color: black;">Try this:<!-- o ignored --></span></p>
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<p class="MsoNormal"><span style="font-size: 10.0pt; color: black;"><a href="http://www.sustainablesupply.com/Dwyer-Instruments-ADPS-06-2-N-Pressure-Switch-Dif-p/w228350.htm?gclid=COu_36jb0K8CFcfb4AodKQxUHA&CAWELAID=1307461896&cagpspn=pla"><span style="color: windowtext;">http://www.sustainablesupply.com/Dwyer-Instruments-ADPS-06-2-N-Pressure-Switch-Dif-p/w228350.htm?gclid=COu_36jb0K8CFcfb4AodKQxUHA&CAWELAID=1307461896&cagpspn=pla</span></a><!-- o ignored --></span></p>
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<p class="MsoNormal"><span style="font-size: 10.0pt; color: black;">At least it will give you a digital threshold. I have had good luck with Dwyer stuff.<!-- o ignored --></span></p>
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<p class="MsoNormal"><span style="font-size: 10.0pt; color: black;">Stephen Abbadessa<!-- o ignored --></span></p>
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<p class="MsoNormal" style="margin-bottom: 12.0pt;"><span style="font-size: 10.0pt; color: black;">-----Original Message-----<br />From: Pete & Sheri <<a href="mailto:spaco@baldwin-telecom.net"><span style="color: windowtext;">spaco@baldwin-telecom.net</span></a>><br />To: Gasification <<a href="mailto:Gasification@bioenergylists.org"><span style="color: windowtext;">Gasification@bioenergylists.org</span></a>><br />Sent: Wed, Apr 25, 2012 2:46 pm<br />Subject: [Gasification] Process controllers for gasifier/engine control and datalogging, Are there any Arduino users out there?<!-- o ignored --></span></p>
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<p class="MsoNormal"><span style="font-size: 10.0pt; color: black;">I have been interested in Jim Mason (and company)’s approach to process control and datalogging using an Arduino based microcontroller since he first announced its existence. I have done a little googling about Arduino in general, and now I am sorta fascinated with it. I already have a fair amount of electronic hobby stuff around here, so I bought an Arduino ATMega2560 last week ($60) and am starting to get familiar with it.<!-- o ignored --></span></p>
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<p class="MsoNormal"><span style="font-size: 10.0pt; color: black;"> The reason for this post:<!-- o ignored --></span></p>
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<p class="MsoNormal"><span style="font-size: 10.0pt; color: black;"> Is anyone else out there using the Arduino as a process controller?<!-- o ignored --></span></p>
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<p class="MsoNormal"><span style="font-size: 10.0pt; color: black;">And, has anyone found inexpensive low pressure sensors? I can’t seem to find any in the +/- 20 inches WC range that are cheaper than about $40 in a 1 to 3 quantity.<!-- o ignored --></span></p>
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<p class="MsoNormal"><span style="font-size: 10.0pt; color: black;">If you don’t know what I am talking about, go to:<!-- o ignored --></span></p>
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<p class="MsoNormal"><span style="font-size: 10.0pt; color: black;"><a href="http://wiki.gekgasifier.com/w/page/6123727/Gasifier-Control-Unit"><span style="text-decoration: underline;"><span style="color: blue;">http://wiki.gekgasifier.com/w/page/6123727/Gasifier-Control-Unit</span></span></a><!-- o ignored --></span></p>
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<p class="MsoNormal"><span style="font-size: 10.0pt; color: black;">(If I was a little farther along, I’d just buy one)<!-- o ignored --></span></p>
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<p class="MsoNormal"><span style="font-size: 10.0pt; color: black;">and then go to:<!-- o ignored --></span></p>
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<p class="MsoNormal"><span style="font-size: 10.0pt; color: black;"><a href="http://www.arduino.cc/"><span style="text-decoration: underline;"><span style="color: blue;">http://www.arduino.cc/</span></span></a><!-- o ignored --></span></p>
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<p class="MsoNormal"><span style="font-size: 10.0pt; color: black;">A whole ‘nother world!!!<!-- o ignored --></span></p>
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<p class="MsoNormal"><span style="font-size: 10.0pt; color: black;">Pete Stanaitis<!-- o ignored --></span></p>
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<pre style="background: white;"><tt><span style="color: black;">_______________________________________________<!-- o ignored --></span></tt></pre>
<pre style="background: white;"><tt><span style="color: black;">Gasification mailing list<!-- o ignored --></span></tt></pre>
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<pre style="background: white;"><tt><span style="color: black;">to Send a Message to the list, use the email address<!-- o ignored --></span></tt></pre>
<pre style="background: white;"><tt><span style="color: black;"><a href="mailto:Gasification@bioenergylists.org"><span style="text-decoration: underline;"><span style="color: blue;">Gasification@bioenergylists.org</span></span></a><!-- o ignored --></span></tt></pre>
<pre style="background: white;"><tt><span style="color: black;"><!-- o ignored --> </span></tt></pre>
<pre style="background: white;"><tt><span style="color: black;">to UNSUBSCRIBE or Change your List Settings use the web page<!-- o ignored --></span></tt></pre>
<pre style="background: white;"><tt><span style="color: black;"><a href="http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org"><span style="text-decoration: underline;"><span style="color: blue;">http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org</span></span></a><!-- o ignored --></span></tt></pre>
<pre style="background: white;"><tt><span style="color: black;"><!-- o ignored --> </span></tt></pre>
<pre style="background: white;"><tt><span style="color: black;">for more Gasifiers, News and Information see our web site:<!-- o ignored --></span></tt></pre>
<pre style="background: white;"><tt><span style="color: black;"><a href="http://gasifiers.bioenergylists.org/"><span style="text-decoration: underline;"><span style="color: blue;">http://gasifiers.bioenergylists.org/</span></span></a><!-- o ignored --></span></tt></pre>
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