[Gasification] Low Pressure sensors

Fri Apr 27 03:31:05 CDT 2012

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 <nsyeecs at vsnl.com>

> **
>
>
>
> 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:* gasification-bounces at lists.bioenergylists.org [mailto:
> gasification-bounces at lists.bioenergylists.org] *On Behalf Of *SHIVANAND
> Ramachandran
> *Sent:* Thursday, April 26, 2012 3:33 AM
> *To:* gasification at lists.bioenergylists.org
> *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:* gasification-bounces at lists.bioenergylists.org [
> mailto:gasification-bounces at lists.bioenergylists.org<gasification-bounces at lists.bioenergylists.org>]
> *On Behalf Of *sabbadess at aol.com
> *Sent:* Wednesday, April 25, 2012 2:18 PM
> *To:* gasification at lists.bioenergylists.org
> *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 <spaco at baldwin-telecom.net>
> To: Gasification <Gasification at bioenergylists.org>
> 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
>
> ----------------
>
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