Cuong, I have been waiting for someone else to suggest bin level sensors such as you are interested in but no one has come forward yet. Have you looked into rotary bin level sensor such as this in your search? http://www.monitortech.com/product_p_rotary.shtml The paddles can be located some distance from the sensor by increasing the shaft length. The bearings can be protected from high heat by locating them farther from the body of the gasifier.
Art Krenzel, P.E. PHOENIX TECHNOLOGIES 10505 NE 285th Street Battle Ground, WA 98604 Until the pain of remaining the same is greater than the pain of change most people prefer to remain the same Date: Fri, 27 Apr 2012 15:31:05 +0700 From: [email protected] To: [email protected]; [email protected] Subject: Re: [Gasification] Low Pressure sensors Hi all! I need a sensor control level rice husk in the reactor .if you know methol usefull or sensor control level, you can help me. I am working a gasifier rice husk type updraft,feed air lock. Thanks!Cuong.pq 2012/4/27 SHIVANAND Ramachandran <[email protected]> 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] [mailto:[email protected]] On Behalf Of [email protected] Sent: Wednesday, April 25, 2012 2:18 PM To: [email protected] 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 At least it will give you a digital threshold. I have had good luck with Dwyer stuff. Stephen Abbadessa -----Original Message----- From: Pete & Sheri <[email protected]> To: Gasification <[email protected]> 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 (If I was a little farther along, I’d just buy one) and then go to: http://www.arduino.cc/ A whole ‘nother world!!! Pete Stanaitis ---------------- _______________________________________________ Gasification mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/ _______________________________________________ Gasification mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/ _______________________________________________ Gasification mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/
_______________________________________________ Gasification mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/
