Pete,
We use MPXV7002 & MPXV5004, whose DP span is lesser ( but sufficient for our gasifiers) but the the output voltage span is more. Which is important, considering that the least count when measured using Arduino is around 5 mV (5 V/1024). So, if you use MPXV12 , which has an output span of 60 mV for a dP of 1020 mmWC, you will effectively get a least count of (1020/ (60/5))= 85 mmWC, which is of little use, unless you amplify the output of the transducer. Regards Shivanand Ramachandran Infinite Energy (P) Ltd New Delhi On 26-04-2012, Pete & Sheri wrote: > Thank you, Shivanand. > > I have found the 10 Kpa range sensors. The MPX12DP, case 344. Is that what you use? > > Is there a better choice? > > Pete Stanaitis > > ---------------- > > FROM: [email protected] [mailto:[email protected]] ON BEHALF OF SHIVANAND Ramachandran > SENT: Thursday, April 26, 2012 3:33 AM > TO: [email protected] > SUBJECT: Re: [Gasification] Low Pressure sensors > > Hi Pete, > > We use arduino microcontrollers for our gasifiers. > > 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. > > I believe Allpowerlabs also use similar transducers (atleast look the same) > > Regards > > Shivanand Ramachandran > > Infinite Energy Private Limited > First Floor, Baba House > 149-A, Kilokri > New Delhi - 110014 > Phone 011-65191937, 65273819 > Fax : 011 - 26348472 > > On 26-04-2012, Pete & Sheri wrote: > >> Hello Stephen. >> >> The link you supplied to Dwyer was for a Switch, not a sensor. I didn't make myself clear. >> >> 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. >> >> Sorry for my poor quality communication, >> >> Pete Stanaitis >> >> --------------- >> >> FROM: [email protected] [1] [mailto:[email protected] [2]] ON BEHALF OF [email protected] [3] >> SENT: Wednesday, April 25, 2012 2:18 PM >> TO: [email protected] [4] >> SUBJECT: Re: [Gasification] Process controllers for gasifier/engine control and datalogging, Are there any Arduino users out there? >> >> Pete, >> >> Try this: >> >> http://www.sustainablesupply.com/Dwyer-Instruments-ADPS-06-2-N-Pressure-Switch-Dif-p/w228350.htm?gclid=COu_36jb0K8CFcfb4AodKQxUHA&CAWELAID=1307461896&cagpspn=pla [5] >> >> At least it will give you a digital threshold. I have had good luck with Dwyer stuff. >> >> Stephen Abbadessa >> >> -----Original Message----- >> From: Pete & Sheri >> To: Gasification >> Sent: Wed, Apr 25, 2012 2:46 pm >> Subject: [Gasification] Process controllers for gasifier/engine control and datalogging, Are there any Arduino users out there? >> >> 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. >> >> The reason for this post: >> >> Is anyone else out there using the Arduino as a process controller? >> >> 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. >> >> If you don't know what I am talking about, go to: >> >> http://wiki.gekgasifier.com/w/page/6123727/Gasifier-Control-Unit [8] >> >> (If I was a little farther along, I'd just buy one) >> >> and then go to: >> >> http://www.arduino.cc/ [9] >> >> A whole 'nother world!!! >> >> Pete Stanaitis >> >> ---------------- >> >> _______________________________________________ >> >> Gasification mailing list >> >> to Send a Message to the list, use the email address >> >> [email protected] [10] >> >> to UNSUBSCRIBE or Change your List Settings use the web page >> >> http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org [11] >> >> for more Gasifiers, News and Information see our web site: >> >> http://gasifiers.bioenergylists.org/ [12] Links: ------ [1] mailto:[email protected] [2] mailto:[email protected] [3] mailto:[email protected] [4] mailto:[email protected] [5] http://www.sustainablesupply.com/Dwyer-Instruments-ADPS-06-2-N-Pressure-Switch-Dif-p/w228350.htm?gclid=COu_36jb0K8CFcfb4AodKQxUHA|+|amp|+|CAWELAID=1307461896|+|amp|+|cagpspn=pla [6] mailto:[email protected] [7] mailto:[email protected] [8] http://wiki.gekgasifier.com/w/page/6123727/Gasifier-Control-Unit [9] http://www.arduino.cc/ [10] mailto:[email protected] [11] http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org [12] http://gasifiers.bioenergylists.org/
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