[Gasification] Low Pressure sensors

english at kingston.net english at kingston.net
Tue May 8 14:05:40 CDT 2012


Here is 'swinging finger' one that we have been using for the last 
year or so.

http://www.hensortech.com/

Alex



On Tuesday 08/05/2012 at 1:20 pm, Art Krenzel  wrote:
>
>
> 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: pqcuong84 at gmail.com
> To: nsyeecs at vsnl.com; gasification at lists.bioenergylists.org
> 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 <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] 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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>
>
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